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Setup time, sleep delay, wake/cold-start time, and client RTT are not included. + +| workload | category | size | server_ms | get_pages | fetched_pages | cache_hits | cache_misses | rows/ops | pages | +| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | +| small-rowid-point | canary | 0.25 MiB | 255.3 | 20 | 244 | 0 | 20 | 50 | 166 | +| small-schema-read | canary | 0.25 MiB | 5.3 | 4 | 4 | 0 | 4 | 128 | 166 | +| small-range-scan | canary | 0.25 MiB | 880.8 | 133 | 2051 | 0 | 133 | 128 | 166 | +| rowid-range-forward | read | 2.00 MiB | 10817.3 | 1035 | 17179 | 0 | 1035 | 1024 | 1231 | +| rowid-range-backward | read | 2.00 MiB | 4523.6 | 1035 | 1035 | 0 | 1035 | 1024 | 1231 | +| secondary-index-covering-range | read | 2.00 MiB | 21.3 | 11 | 11 | 0 | 11 | 1024 | 1063 | +| secondary-index-scattered-table | read | 2.00 MiB | 7778.9 | 1038 | 3241 | 0 | 1038 | 1024 | 1063 | +| aggregate-status | read | 2.00 MiB | 14175.7 | 1037 | 16733 | 0 | 1037 | 1024 | 1231 | +| aggregate-time-bucket | read | 2.00 MiB | 10989.9 | 1030 | 17172 | 0 | 1030 | 1024 | 1231 | +| aggregate-tenant-time-range | read | 1.00 MiB | 226.4 | 39 | 111 | 0 | 39 | 16 | 623 | +| feed-order-by-limit | read | 1.00 MiB | 2656.3 | 519 | 519 | 0 | 519 | 512 | 623 | +| feed-pagination-adjacent | read | 1.00 MiB | 263.4 | 106 | 106 | 0 | 106 | 100 | 623 | +| join-order-items | read | 2.00 MiB | 80.9 | 32 | 38 | 0 | 32 | 2048 | 1231 | +| random-point-lookups | read | 2.00 MiB | 7718.5 | 1011 | 3304 | 0 | 1011 | 1000 | 1231 | +| hot-index-cold-table | read | 2.00 MiB | 41.3 | 16 | 26 | 0 | 16 | 8 | 1063 | +| ledger-without-rowid-range | read | 2.00 MiB | 458.6 | 94 | 176 | 0 | 94 | 564 | 176 | +| write-batch-after-wake | write | 1.00 MiB | 402.4 | 15 | 17 | 0 | 15 | 1000 | 1642 | +| update-hot-partition | write | 1.00 MiB | 6902.0 | 516 | 8498 | 0 | 516 | 64 | 623 | +| delete-churn-range-read | write | 1.00 MiB | 7040.2 | 526 | 8398 | 0 | 526 | 448 | 623 | +| 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"actorKey": [ + "sqlite-realworld-bench", + "sqlite-realworld-1777457369713-0f3d5eb3", + "write-batch-after-wake" + ], + "actorId": "hcgp09mjwyt8ihqs9gwoxbrogeal00", + "setup": { + "rows": 512, + "targetBytes": 1048576, + "rowBytes": 2048, + "setupMs": 270.18651500000124, + "pageCount": 622 + }, + "main": { + "ms": 358.1510600000038, + "workload": "write-batch-after-wake", + "rows": 1000, + "pageCount": 1642 + }, + "vfsMetrics": { + "resolvePagesTotal": 12, + "resolvePagesRequestedTotal": 12, + "resolvePagesCacheHitsTotal": 0, + "resolvePagesCacheMissesTotal": 12, + "getPagesTotal": 12, + "pagesFetchedTotal": 14, + "prefetchPagesTotal": 2, + "bytesFetchedTotal": 57344, + "prefetchBytesTotal": 8192, + "getPagesDurationSecondsSum": 0.021715727000000004, + "getPagesDurationSecondsCount": 12 + } + } + ] +} diff --git a/.agent/benchmarks/sqlite-realworld-smoke/latest/summary.md b/.agent/benchmarks/sqlite-realworld-smoke/latest/summary.md new file mode 100644 index 0000000000..52e4fc4cef --- /dev/null +++ b/.agent/benchmarks/sqlite-realworld-smoke/latest/summary.md @@ -0,0 +1,23 @@ +SQLite real-world benchmark + +Server SQLite time only. Setup time, sleep delay, wake/cold-start time, and client RTT are not included. + +| workload | category | size | server_ms | get_pages | fetched_pages | cache_hits | cache_misses | rows/ops | pages | +| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | +| small-rowid-point | canary | 0.25 MiB | 36.0 | 4 | 67 | 13 | 4 | 50 | 166 | +| small-schema-read | canary | 0.25 MiB | 5.1 | 1 | 1 | 0 | 1 | 128 | 166 | +| small-range-scan | canary | 0.25 MiB | 60.0 | 6 | 152 | 124 | 6 | 128 | 166 | +| rowid-range-forward | read | 2.00 MiB | 334.6 | 15 | 1223 | 1017 | 15 | 1024 | 1231 | +| rowid-range-backward | read | 2.00 MiB | 356.4 | 18 | 1230 | 1014 | 18 | 1024 | 1231 | +| secondary-index-covering-range | read | 2.00 MiB | 17.9 | 8 | 8 | 0 | 8 | 1024 | 1063 | +| secondary-index-scattered-table | read | 2.00 MiB | 2003.8 | 539 | 1935 | 496 | 539 | 1024 | 1063 | +| aggregate-status | read | 2.00 MiB | 584.5 | 24 | 2132 | 1010 | 24 | 1024 | 1231 | +| aggregate-time-bucket | read | 2.00 MiB | 331.5 | 10 | 1216 | 1017 | 10 | 1024 | 1231 | +| aggregate-tenant-time-range | read | 1.00 MiB | 101.5 | 32 | 127 | 4 | 32 | 16 | 623 | +| feed-order-by-limit | read | 1.00 MiB | 183.1 | 9 | 621 | 507 | 9 | 512 | 623 | +| feed-pagination-adjacent | read | 1.00 MiB | 49.5 | 7 | 135 | 96 | 7 | 100 | 623 | +| join-order-items | read | 2.00 MiB | 50.8 | 29 | 35 | 0 | 29 | 2048 | 1231 | +| random-point-lookups | read | 2.00 MiB | 2616.4 | 592 | 1981 | 416 | 592 | 1000 | 1231 | +| hot-index-cold-table | read | 2.00 MiB | 29.9 | 11 | 17 | 2 | 11 | 8 | 1063 | +| ledger-without-rowid-range | read | 2.00 MiB | 232.6 | 44 | 139 | 47 | 44 | 564 | 176 | +| write-batch-after-wake | write | 1.00 MiB | 358.2 | 12 | 14 | 0 | 12 | 1000 | 1642 | diff --git a/.agent/specs/sqlite-read-connection-pool.md b/.agent/specs/sqlite-read-connection-pool.md new file mode 100644 index 0000000000..d63605ec5a --- /dev/null +++ b/.agent/specs/sqlite-read-connection-pool.md @@ -0,0 +1,293 @@ +# SQLite Read Connection Pool + +## Goal + +Allow independent read-only SQLite statements inside one Rivet Actor to run in parallel so VFS round trips can overlap. Keep writes, migrations, explicit transactions, sleep cleanup, and SQLite connection state deterministic. + +This targets workloads like multiple expensive aggregates issued concurrently: + +```ts +await Promise.all([ + c.db.execute("SELECT count(*) FROM events WHERE kind = ?", "click"), + c.db.execute("SELECT avg(duration) FROM events WHERE kind = ?", "job"), + c.db.execute("SELECT max(created_at) FROM events"), +]); +``` + +Today these calls serialize through the TypeScript database mutex and through the single native SQLite handle in `rivetkit-core`. + +## Current Shape + +- `rivetkit-typescript/packages/rivetkit/src/common/database/mod.ts` serializes public `c.db.execute(...)` calls with `AsyncMutex`. +- `rivetkit-typescript/packages/rivetkit/src/common/database/native-database.ts` serializes lower-level `exec/query/run` calls with `AsyncMutex`. +- `rivetkit-typescript/packages/rivetkit/src/db/drizzle.ts` also serializes Drizzle callback execution and raw `execute(...)` calls with `AsyncMutex`. +- `rivetkit-core/src/actor/sqlite.rs` stores one `NativeDatabaseHandle` behind `Arc>>`. +- `rivetkit-sqlite/src/database.rs::open_database_from_envoy` registers one VFS named `envoy-sqlite-{actor_id}` and opens one `sqlite3*`. +- `rivetkit-sqlite/src/vfs.rs` owns VFS state: generation, head txid, page cache, protected cache, write buffer, recent page hints, aux files, and dead/fence state. +- `open_database(...)` configures `PRAGMA locking_mode = EXCLUSIVE`. That is compatible with a single writable connection, but not with any design that keeps readers open beside a writer. + +## Design + +Introduce one actor-local SQLite connection manager with two mutually exclusive modes: + +```text +SqliteDb + SqliteConnectionManager + read mode: N read-only connections, single-statement reads + write mode: exactly one read/write connection + shared VFS registration/context/cache + mode gate +``` + +Connection modes: + +- **Read mode**: one or more read-only connections may be open. Only single prepared statements verified by SQLite as read-only run here. +- **Write mode**: exactly one writable connection is open. All mutations, migrations, explicit transactions, multi-statement `exec`, and fallback queries run here. No reader connection may be open while the writable connection is open. +- **Shared VFS**: all connections for one actor use the same registered VFS and same `VfsContext`, so page cache, read-ahead predictor, preload hints, aux files, generation fencing, and dead state stay actor-global. + +The pool is implemented in Rust/core. TypeScript and NAPI call into one authoritative native routing layer instead of maintaining parallel SQL routing logic. + +## Routing Rules + +- `run(...)` always enters write mode. +- `exec(...)` enters write mode in v1. Multi-statement read-only routing can come later. +- single-statement `execute(...)` prepares/classifies once without stepping, then routes. Read-only statements use read mode. Non-read-only statements use write mode. +- `query(...)` and `run(...)` become compatibility wrappers around native `execute(...)` where possible. They must not be the policy boundary. +- Explicit transaction APIs, once exposed, hold write mode for the whole transaction. +- Raw transaction-control statements are write-mode only. They are never allowed on readers, even if SQLite reports them as read-only. +- Before entering write mode, the manager stops admitting new reads, waits for active readers to finish, closes all reader connections, then opens exactly one writable connection. +- While `sqlite3_get_autocommit(writer) == 0`, the manager remains in write mode. All DB operations route to the writable connection until autocommit becomes true again. +- After write-mode work completes and autocommit is true, close the writable connection before admitting read-mode work again. +- Migration mode routes all DB calls through write mode and prevents reader creation. This includes Drizzle's migration reads such as `SELECT created_at FROM __drizzle_migrations`. +- After migration mode or schema-changing writer work, the next read-mode connections must be fresh. +- Inspector database reads can use the read path. Inspector execute uses native `execute(...)` and must not bypass gates. + +## Read-Only Enforcement + +Do not classify SQL with string parsing. + +Use SQLite enforcement in `rivetkit-sqlite`: + +- prepare/classify without stepping +- reject non-whitespace tail text from `sqlite3_prepare_v2` for reader routing +- use `sqlite3_stmt_readonly(stmt)` as one check before reader routing +- use an authorizer during classification to collect transaction, attach, temp, schema, function, and write actions +- open reader connections with `SQLITE_OPEN_READONLY` against the shared VFS +- never use SQLite URI `immutable=1` +- set `PRAGMA query_only = ON` on reader connections +- install a mandatory SQLite authorizer on reader connections + +The reader authorizer must deny: + +- transaction control: `BEGIN`, `COMMIT`, `ROLLBACK`, `SAVEPOINT`, `RELEASE`, `ROLLBACK TO` +- `ATTACH` and `DETACH` +- schema writes and temp schema writes +- non-whitelisted `PRAGMA` statements +- non-whitelisted function calls if user-defined functions are ever exposed +- all write opcodes + +For v1, if a statement cannot be confidently prepared and verified as one read-only statement, route it to the writer before stepping. Error only when the statement is explicitly disallowed, malformed, multi-statement where unsupported, denied by shutdown, or denied by fence state. + +The classification path must be explicit. A viable v1 approach is: + +1. Acquire a short classifier mutex. +2. Prepare on a classifier or temporary writable connection without stepping. +3. Check tail text, authorizer action log, transaction-control actions, and `sqlite3_stmt_readonly`. +4. Finalize the classifier statement. +5. Acquire the read or write permit. +6. Prepare and step on the selected execution connection. + +## Scheduling + +Use a writer-preferential mode gate in core: + +- read-only query acquires a shared read-mode permit +- writer work requests write mode +- once a writer is waiting, new reads wait behind it so writes do not starve +- active reads are allowed to finish before the writer starts +- write-mode transition closes all readers before opening the writable connection +- the writable connection stays open only for the full writer statement, `exec`, migration phase, or explicit transaction API + +The gate belongs in `rivetkit-core`, not TypeScript, so Rust, NAPI, inspector, and future runtimes share the same semantics. + +TypeScript should remove or narrow the DB-level `AsyncMutex` only after native routing is authoritative. TS may still serialize conversion and close bookkeeping, but it must not serialize all read queries once the pool is active. + +Manual raw transactions are a compatibility mode, not a new isolation guarantee. If user code starts `BEGIN` and then yields, the manager stays in write mode with exactly one writable connection until `COMMIT` or `ROLLBACK`. No reader connections may open during that window. + +## Pool Sizing + +Default policy: + +- `max_readers = 4` +- `min_readers = 0` +- open readers lazily when concurrent read demand exists +- keep idle readers warm for 60 seconds +- close idle readers only, never active readers +- close all readers on actor sleep, destroy, actor lost-fence, and final database close +- close all readers before opening a writable connection +- close the writable connection before opening or reusing readers + +Config lives in the central SQLite optimization flag/config path with these logical knobs: + +- `sqlite_read_pool_enabled` +- `sqlite_read_pool_max_readers` +- `sqlite_read_pool_idle_ttl_ms` + +## VFS Refactor + +The current `NativeDatabase` owns both one `sqlite3*` and one `SqliteVfs`. That does not work for a pool because each extra connection would try to register the same VFS name or create duplicate VFS state. + +Refactor to separate: + +- `NativeVfsHandle`: owns VFS registration and shared `VfsContext` +- `NativeConnection`: owns one `sqlite3*` +- `NativeConnectionManager`: owns one `NativeVfsHandle`, either one writable `NativeConnection` or lazy reader `NativeConnection`s, and the mode gate + +The VFS name should include the SQLite generation or another unique pool generation, not only actor id. This makes stale actor cleanup/name reuse failures fail visibly instead of colliding with the next actor generation. + +Opening a connection uses the manager's registered VFS name. Dropping a connection closes only its `sqlite3*`. Dropping the manager first closes all SQLite connections, then unregisters the VFS. + +The VFS must support read-only opens and role-aware file handles: + +- store connection/file role on `VfsFile` and `AuxFileHandle` +- set `pOutFlags` accurately from open flags +- reject `xWrite`, `xTruncate`, `xDelete`, dirty-page sync, and atomic-write file controls from reader-owned handles +- deny reader aux-file creation in v1 unless a specific read-only SQLite path is proven safe +- deny `ATTACH`, temp tables, temp schema writes, and reader journal creation through authorizer and VFS role checks + +The shared VFS state must distinguish committed state from writer-local state. Reader file handles read only committed pages for their statement. Writer dirty buffers, journal-like aux state, and atomic-write state are writer-owned until commit publishes them. + +`PRAGMA locking_mode = EXCLUSIVE` may remain for write mode because the writable connection is the only open connection. Read mode should not set exclusive locking on reader connections. + +Pooled mode must implement enough intra-actor SQLite lock state for multiple connections: + +- concurrent SHARED reader locks are allowed +- writable RESERVED/PENDING/EXCLUSIVE locks are granted only in write mode after all readers are closed +- `xCheckReservedLock` reports real reserved-writer state +- VFS callbacks assert that write-only operations hold the write-mode permit + +If a first implementation keeps SQLite locks as no-ops, the feature must remain disabled behind a test-only flag until VFS role assertions prove every SQLite entrypoint is gated correctly. + +## Snapshot Semantics + +Target v1 semantics: + +- Parallel readers observe a stable SQLite snapshot for each statement. +- Write mode waits for active readers to finish and closes all readers before opening the writable connection. +- New readers wait behind a pending write-mode request. +- Readers are allowed to observe either the state before a waiting writer or the state after that writer completes. They must not observe a partially committed write. + +Because write mode cannot start while reads run, the VFS `head_txid`, `db_size_pages`, write buffer, and page cache are stable for active readers. The writable connection updates VFS meta and cache only while holding the write-mode permit. + +Schema changes are broader than migrations. Because readers are closed before every write mode, any read connections after schema-changing work are fresh. + +Future optimization can allow reads to continue during writes by pinning per-reader head txids, but v1 should not attempt that. + +## TypeScript And Migration Integration + +The TypeScript work is required for the feature to have any effect. + +- `common/database/mod.ts` raw `db().execute(...)` must stop using a per-query mutex once native routing is authoritative. +- `common/database/native-database.ts::wrapJsNativeDatabase` must stop serializing all `query(...)` calls. +- `db/drizzle.ts` must stop serializing all Drizzle callback reads and raw `execute(...)` calls. +- These wrappers should keep closed-state checks with an in-flight counter or close gate. `close()` stops admission and waits for in-flight native calls before closing. +- Drizzle and raw DB migration hooks run in native migration mode, which routes every DB call through write mode and prevents reader creation. +- TS string heuristics such as `sqlReturnsRows(...)` and `hasMultipleStatements(...)` should be reduced to compatibility fallbacks. Add a native `execute(...)` API that returns `{ columns, rows, changes, routedAs }` for single statements so TS does not decide read/write behavior by string. +- Core and TS inspector database execute endpoints should both use the native `execute(...)` path. + +## Error Behavior + +- If classification finds a statement is not read-only, route through write mode before stepping. Do not step it on a reader. +- If a reader authorizer or VFS role check rejects a statement that should have used write mode, treat that as a routing bug, fail closed, and increment a metric. +- If any connection sees `SqliteFenceMismatch`, mark the shared VFS dead and close all idle readers. Future operations fail closed. +- If close/sleep/destroy begins, enter manager closing state, stop admitting new work, wait for active connection jobs to finish or observe the existing shutdown cancellation path, close SQLite handles, then unregister/free the VFS. +- The VFS context must be refcounted so active `VfsFile`s keep it alive until `xClose`. +- If a reader idle close fails, log with tracing and mark the connection unusable. + +## Metrics + +Add core Prometheus metrics for pool internals: + +- active reader count +- idle reader count +- read pool wait duration +- write-mode wait duration +- routed read-only queries +- write-mode fallback queries +- manual transaction mode count/duration +- reader open/close counts +- reader rejected mutation count +- read-to-write mode transition count/duration +- write-to-read mode transition count/duration + +Existing VFS metrics should continue to aggregate at the shared VFS level. + +TS `trackSql(...)` remains query-duration logging and should not duplicate pool internals. + +## Implementation Plan + +1. Add `sqlite3_stmt_readonly` support in `rivetkit-sqlite::query`. +2. Add single-statement prepare-tail validation and classification authorizer support. +3. Split `NativeDatabase` into VFS ownership and connection ownership. +4. Add VFS role-aware file handles and reader write rejection. +5. Replace exclusive locking with pooled-mode lock behavior. +6. Add `NativeConnectionManager` with read/write modes, lazy reader connections, idle TTL, closing state, and close ordering. +7. Replace `SqliteDb.db: Arc>>` with the pool handle. +8. Implement writer-preferential async gate in core. Avoid holding sync locks across awaits. +9. Implement manual transaction mode based on `sqlite3_get_autocommit(writer)`. +10. Route native `execute(...)` read-only statements to reader pool. Keep `run` and `exec` write-mode only in v1 compatibility paths. +11. Update raw TS DB, Drizzle, native wrapper, and inspector execute to use native routing without serializing all reads. +12. Add metrics and config flags. Default the feature off until stress tests pass, then default on. + +## Test Plan + +Rust unit and integration tests: + +- `sqlite3_stmt_readonly` classification for `SELECT`, read-only `PRAGMA`, mutating `PRAGMA`, `INSERT ... RETURNING`, CTE writes, `VACUUM`, `ATTACH`, and multi-statement SQL. +- prepare-tail rejection for `SELECT 1; INSERT ...` on the reader path. +- transaction-control statements never route to readers: `BEGIN`, `COMMIT`, `ROLLBACK`, `SAVEPOINT`, `RELEASE`, and `ROLLBACK TO`. +- reader authorizer denies attach, detach, temp writes, schema writes, unsafe pragmas, and unsafe functions. +- reader VFS handles reject `xWrite`, `xTruncate`, `xDelete`, dirty-page sync, and atomic-write controls. +- VFS lock transitions allow concurrent SHARED readers and protect write-mode RESERVED/EXCLUSIVE locks. +- Multiple concurrent read queries use multiple reader connections and complete faster than serialized reads with an artificial VFS delay. +- Write mode waits for active readers and new readers wait behind a pending write-mode request. +- Manual `BEGIN` puts the manager in write mode. All later operations route to the writable connection until autocommit is restored. +- Migrations run in write mode. Reader schema cache is refreshed after migration. +- DDL runs with no reader connections open. Later reads use fresh reader connections. +- Reader pool closes idle readers after TTL and never closes active readers. +- Sleep/destroy closes readers or the writable connection in deterministic order. +- Fence mismatch from any reader kills the shared VFS state. +- VFS page cache is shared across read mode and write mode. +- Active VFS files keep the context alive until close even during pool shutdown. + +TypeScript driver tests: + +- `Promise.all` of read-only `c.db.execute(...)` calls overlaps in wall time with an injected VFS delay. +- Drizzle parallel read callbacks overlap in wall time with an injected VFS delay. +- Concurrent read and write preserves write ordering and does not throw random busy errors. +- Explicit `BEGIN` / `COMMIT` sequences remain exclusive on the writer. +- `onMigrate` and Drizzle migrations do not open readers before migration completes. +- Inspector execute handles `SELECT`, `INSERT RETURNING`, plain `INSERT`, mutating `PRAGMA`, and rejected multi-statement SQL through native routing. +- Background timers using `c.db` after close still get the existing closed database error. + +Stress tests: + +- concurrent read aggregates while queued writes run +- concurrent inspector reads while user reads and writes run +- actor sleep/wake churn with active readers +- lost-fence / actor replacement during active reads + +## Non-Goals + +- Parallel writes. +- Parallel stepping on one SQLite connection. +- Multi-statement read-only routing in v1. +- Read/write overlap with pinned historical snapshots in v1. +- SQL string parsing as the authority for read-only classification. +- Solving cross-action interleaving inside user-managed raw transactions beyond preserving today's single-writer behavior. + +## Open Questions + +- Should `max_readers` default to 2 instead of 4 for actor density? +- Do reader connections need a smaller SQLite pager cache because the VFS cache is shared underneath? +- Should the classifier use a dedicated temporary connection, a selected reader, or a lightweight parser plus reader prepare with distinguishable authorizer failures? diff --git a/CLAUDE.md b/CLAUDE.md index 475bace6b4..318949b4f9 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -106,6 +106,10 @@ docker-compose up -d - RivetKit SQLite is native-only: VFS and query execution live in `rivetkit-rust/packages/rivetkit-sqlite/`, core owns lifecycle, and NAPI only marshals JS types. - Actor2 workflows and envoy actors always use the SQLite v2 storage format; only old actor v1 workflows and pegboard runners use the v1 storage format. ("v2" here refers to the on-disk storage format, not envoy-protocol v2.) - Native SQLite VFS recent-page preload hints are actor-side Rust state surfaced by `NativeDatabase::snapshot_preload_hints()`; persist and consume them through runtime/envoy wiring, not JS APIs. +- SQLite VFS file handles must enforce their reader or writer role; reader-owned handles fail closed on mutating callbacks. +- Native SQLite single-statement work should route through the native execute path; keep `exec` as the multi-statement compatibility path. +- Native SQLite manual transactions keep an idle writer open until autocommit returns; route subsequent work through the writer instead of reader classification. +- Native SQLite read mode may hold multiple read-only connections, while write mode must hold exactly one writable connection and no readers; TypeScript must not be the routing policy boundary. - For NAPI bridge wiring (TSF callback layout, cancellation tokens, `#[napi(object)]` rules), see `docs-internal/engine/napi-bridge.md`. ## Agent Working Directory diff --git a/docs-internal/engine/SQLITE_OPTIMIZATIONS.md b/docs-internal/engine/SQLITE_OPTIMIZATIONS.md index adacb5b18c..f79fabb8da 100644 --- a/docs-internal/engine/SQLITE_OPTIMIZATIONS.md +++ b/docs-internal/engine/SQLITE_OPTIMIZATIONS.md @@ -11,15 +11,16 @@ Range page-read protocol details live in `.agent/specs/sqlite-range-page-read-pr ## Existing Optimizations - Actor startup can preload SQLite VFS pages through `OpenConfig.preload_pgnos`, `OpenConfig.preload_ranges`, and persisted `/PRELOAD_HINTS`; first pages, hint mechanisms, and the preload byte budget are configured through central SQLite optimization flags. -- The VFS keeps an in-memory page cache seeded from `sqlite_startup_data.preloaded_pages`; capacity, fetched/prefetched/startup cache classes, and scan-resistant protected-cache budget are configured through central SQLite optimization flags. -- The VFS has speculative read-ahead via `prefetch_depth` and `max_prefetch_bytes`; the default forward-scan budget is 64 pages, which reduced the cold-read benchmark from 1,249 to 368 VFS `get_pages` calls. +- The VFS keeps an in-memory page cache seeded from `sqlite_startup_data.preloaded_pages`; cache behavior is selected with `RIVETKIT_SQLITE_OPT_VFS_PAGE_CACHE_MODE=off|target|startup|prefetch|all`, with capacity and protected-cache budget configured separately. +- The VFS has speculative read-ahead selected with `RIVETKIT_SQLITE_OPT_READ_AHEAD_MODE=off|bounded|adaptive`; the default bounded budget is 64 pages, which reduced the cold-read benchmark from 1,249 to 368 VFS `get_pages` calls. - The VFS tracks bounded recent page hints as hot pages plus coalesced scan ranges; `NativeDatabase::snapshot_preload_hints()` exposes the in-memory plan for future flush wiring. - Actor Prometheus metrics expose VFS read counters, fetched bytes, cache hits/misses, and `get_pages` duration at `/gateway//metrics`. - `sqlite-storage` keeps an in-memory PIDX cache and decodes each unique DELTA/SHARD blob once per `get_pages(...)` call. - `sqlite-storage` exposes `get_page_range(...)` for bounded contiguous reads; it reuses `get_pages(...)` source resolution and currently caps ranges at 256 pages / 1 MiB. -- `sqlite-storage` reassembles large chunked logical values with one bounded chunk-prefix range read by default, with `RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS=false` preserving the serial 10 KB chunk-get path. +- `sqlite-storage` reassembles large chunked logical values with one bounded chunk-prefix range read by default; `RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS=false` selects serial 10 KB chunk gets for comparison runs. - `sqlite-storage` caches decoded DELTA/SHARD LTX blobs across repeated reads by default, with `RIVETKIT_SQLITE_OPT_DECODED_LTX_CACHE=false` preserving per-read decode behavior. - `sqlite-storage` compaction folds DELTA pages into SHARD blobs for steadier read behavior. +- The native read-mode/write-mode SQLite connection manager routes read-only statements to pooled read-only connections and routes writes, transactions, and fallbacks through exclusive write mode. Read-pool v1 closes readers before writes and does not pin per-reader head txids. ## Recommended Optimizations diff --git a/docs-internal/engine/sqlite-vfs.md b/docs-internal/engine/sqlite-vfs.md index 9896029856..2a864e1825 100644 --- a/docs-internal/engine/sqlite-vfs.md +++ b/docs-internal/engine/sqlite-vfs.md @@ -31,3 +31,10 @@ The native VFS uses the same 4 KiB chunk layout and KV key encoding as the WASM - SQLite VFS aux-file create/open paths mutate `BTreeMap` state under one write lock with `entry(...).or_insert_with(...)`. Avoid read-then-write upgrade patterns. - SQLite VFS v2 storage keys use literal ASCII path segments under the `0x02` subspace prefix with big-endian numeric suffixes so `scan_prefix` and `BTreeMap` ordering stay numerically correct. - SQLite v2 slow-path staging writes encoded LTX bytes directly under DELTA chunk keys. Do not expect `/STAGE` keys or a fixed one-chunk-per-page mapping in tests or recovery code. + +## Read-mode/write-mode connection manager + +- The native connection manager is the SQLite read/write routing policy boundary. TypeScript and NAPI wrappers forward calls to native execution and must not decide routing from SQL text. +- Read mode may hold multiple read-only SQLite connections against one shared VFS context. Write mode must hold exactly one writable SQLite connection and no reader connections. +- Entering write mode stops admitting new readers, waits for active readers to release, closes idle readers, then opens or reuses the single writable connection. +- Read-pool v1 intentionally does not let readers continue during writes and does not pin per-reader head txids or snapshots. Any future design that overlaps readers with writers must add explicit snapshot fencing. diff --git a/engine/packages/pegboard-envoy/src/ws_to_tunnel_task.rs b/engine/packages/pegboard-envoy/src/ws_to_tunnel_task.rs index e5a1104104..575f417efd 100644 --- a/engine/packages/pegboard-envoy/src/ws_to_tunnel_task.rs +++ b/engine/packages/pegboard-envoy/src/ws_to_tunnel_task.rs @@ -751,7 +751,7 @@ async fn handle_sqlite_get_pages( .get_pages(&request.actor_id, request.generation, request.pgnos.clone()) .await { - Ok(result) => Ok(sqlite_get_pages_ok(conn, &request.actor_id, result).await?), + Ok(result) => Ok(sqlite_get_pages_ok(result)), Err(err) => match sqlite_storage_error(&err) { Some(SqliteStorageError::FenceMismatch { reason }) => { Ok(protocol::SqliteGetPagesResponse::SqliteFenceMismatch( @@ -799,29 +799,19 @@ async fn handle_sqlite_get_page_range( } } -async fn sqlite_get_pages_ok( - conn: &Conn, - actor_id: &str, +fn sqlite_get_pages_ok( result: sqlite_storage::types::GetPagesResult, -) -> Result { - let meta = if sqlite_storage::optimization_flags::sqlite_optimization_flags() - .dedup_get_pages_meta - { - result.meta - } else { - conn.sqlite_engine.load_meta(actor_id).await? - }; - - Ok(protocol::SqliteGetPagesResponse::SqliteGetPagesOk( +) -> protocol::SqliteGetPagesResponse { + protocol::SqliteGetPagesResponse::SqliteGetPagesOk( protocol::SqliteGetPagesOk { pages: result .pages .into_iter() .map(sqlite_runtime::protocol_sqlite_fetched_page) .collect(), - meta: sqlite_runtime::protocol_sqlite_meta(meta), + meta: sqlite_runtime::protocol_sqlite_meta(result.meta), }, - )) + ) } fn sqlite_get_page_range_ok( diff --git a/engine/packages/sqlite-storage/CLAUDE.md b/engine/packages/sqlite-storage/CLAUDE.md index 622ba91daf..047601324c 100644 --- a/engine/packages/sqlite-storage/CLAUDE.md +++ b/engine/packages/sqlite-storage/CLAUDE.md @@ -5,7 +5,8 @@ - `SqliteEngine::get_pages` returns `GetPagesResult` with pages and transaction-read meta; reuse that meta for successful responses instead of issuing a second META read. - `SqliteEngine::get_page_range` shares `get_pages` source resolution through `read_pages`; use it for contiguous range reads and keep its 256-page / 1 MiB hard cap aligned with the range protocol. - SQLite startup preload policy is configured in `optimization_flags.rs`; keep first pages, persisted hint mechanisms, and byte budget there instead of hardcoding open-time preload behavior. -- Native VFS page cache policy is configured in `optimization_flags.rs`; keep capacity, cache-class toggles, and scan-resistant protected-cache budgets there. -- Large chunked logical values are reassembled with a bounded chunk-prefix range read by default; `RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS=false` preserves the serial 10 KB chunk-get fallback. +- SQLite read-pool rollout knobs are configured in `optimization_flags.rs`; build `NativeConnectionManagerConfig` from those shared flags instead of hardcoding reader counts or TTLs. +- Native VFS page cache policy is configured as `off|target|startup|prefetch|all` in `optimization_flags.rs`; keep capacity and protected-cache budgets there. +- Large chunked logical values are reassembled with a bounded chunk-prefix range read by default; `RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS=false` selects serial 10 KB chunk gets for comparison runs. - Repeated DELTA/SHARD LTX decodes are cached inside `SqliteEngine`; `RIVETKIT_SQLITE_OPT_DECODED_LTX_CACHE=false` preserves per-read decode behavior. -- LTX decoding validates header, page frames, and page index structure, and accepts both trailer and legacy no-trailer blobs. +- LTX decoding validates header, page frames, page index structure, and a zeroed checksum trailer. diff --git a/engine/packages/sqlite-storage/src/commit.rs b/engine/packages/sqlite-storage/src/commit.rs index c780da93e7..b84b38ebbc 100644 --- a/engine/packages/sqlite-storage/src/commit.rs +++ b/engine/packages/sqlite-storage/src/commit.rs @@ -1264,7 +1264,7 @@ mod tests { assert_eq!(stored_head.db_size_pages, 1); clear_op_count(&engine); - let pages = engine.get_pages(TEST_ACTOR, 4, vec![1]).await?; + let pages = engine.get_pages(TEST_ACTOR, 4, vec![1]).await?.pages; assert_eq!( pages, vec![FetchedPage { @@ -1286,7 +1286,7 @@ mod tests { let result = engine.commit(TEST_ACTOR, request(4, 0)).await?; assert_eq!(result.txid, 1); assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![1]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![1]).await?.pages, vec![FetchedPage { pgno: 1, bytes: Some(page(0x55)), @@ -1307,7 +1307,7 @@ mod tests { .await?; let requested_pages = (1..=100).collect::>(); - let fetched_pages = engine.get_pages(TEST_ACTOR, 4, requested_pages).await?; + let fetched_pages = engine.get_pages(TEST_ACTOR, 4, requested_pages).await?.pages; assert_eq!(fetched_pages.len(), 100); assert!( fetched_pages @@ -1342,7 +1342,7 @@ mod tests { .await?; assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![1]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![1]).await?.pages, vec![FetchedPage { pgno: 1, bytes: Some(page(0xaa)), @@ -1361,7 +1361,7 @@ mod tests { engine.commit(TEST_ACTOR, request(4, 0)).await?; assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![2]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![2]).await?.pages, vec![FetchedPage { pgno: 2, bytes: None, @@ -1410,14 +1410,14 @@ mod tests { .await?; assert_eq!( - engine.get_pages("actor-a", 4, vec![1]).await?, + engine.get_pages("actor-a", 4, vec![1]).await?.pages, vec![FetchedPage { pgno: 1, bytes: Some(page(0x1a)), }] ); assert_eq!( - engine.get_pages("actor-b", 4, vec![1]).await?, + engine.get_pages("actor-b", 4, vec![1]).await?.pages, vec![FetchedPage { pgno: 1, bytes: Some(page(0x2b)), @@ -1456,7 +1456,7 @@ mod tests { )?; assert_eq!(stored_head.db_size_pages, 100); assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![100]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![100]).await?.pages, vec![FetchedPage { pgno: 100, bytes: Some(page(0x64)), @@ -1861,7 +1861,7 @@ mod tests { assert_eq!(stored_head.db_size_pages, 70); clear_op_count(&engine); - let pages = engine.get_pages(TEST_ACTOR, 4, vec![1, 2, 70]).await?; + let pages = engine.get_pages(TEST_ACTOR, 4, vec![1, 2, 70]).await?.pages; assert_eq!( pages, vec![ @@ -2070,7 +2070,7 @@ mod tests { assert_eq!(txid, 1); assert_eq!(compaction_rx.recv().await, Some(TEST_ACTOR.to_string())); assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![1, 1025, 3072]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![1, 1025, 3072]).await?.pages, vec![ FetchedPage { pgno: 1, diff --git a/engine/packages/sqlite-storage/src/compaction/shard.rs b/engine/packages/sqlite-storage/src/compaction/shard.rs index 775508092f..1f36b71e02 100644 --- a/engine/packages/sqlite-storage/src/compaction/shard.rs +++ b/engine/packages/sqlite-storage/src/compaction/shard.rs @@ -709,7 +709,7 @@ mod tests { .expect("meta should exist after compaction"), )?; assert_eq!(stored_head.materialized_txid, 5); - let pages = engine.get_pages(TEST_ACTOR, 4, vec![1, 2, 3, 4, 5]).await?; + let pages = engine.get_pages(TEST_ACTOR, 4, vec![1, 2, 3, 4, 5]).await?.pages; assert_eq!( pages, vec![ @@ -783,7 +783,7 @@ mod tests { .is_none() ); - let pages = engine.get_pages(TEST_ACTOR, 4, vec![1, 2]).await?; + let pages = engine.get_pages(TEST_ACTOR, 4, vec![1, 2]).await?.pages; assert_eq!( pages, vec![ @@ -1016,7 +1016,7 @@ mod tests { assert!(engine.compact_shard(FAIL_ACTOR, 0).await?); assert_eq!( - engine.get_pages(FAIL_ACTOR, 4, vec![1, 2]).await?, + engine.get_pages(FAIL_ACTOR, 4, vec![1, 2]).await?.pages, vec![ FetchedPage { pgno: 1, @@ -1165,7 +1165,8 @@ mod tests { assert_eq!( engine .get_pages(TEST_ACTOR, head.generation, vec![1, 2]) - .await?, + .await? + .pages, vec![ FetchedPage { pgno: 1, @@ -1309,7 +1310,7 @@ mod tests { .is_empty() ); assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![1, 65, 129]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![1, 65, 129]).await?.pages, vec![ FetchedPage { pgno: 1, @@ -1359,7 +1360,7 @@ mod tests { assert_eq!(engine.compact_worker(TEST_ACTOR, 8).await?, 1); assert_eq!(engine.compact_worker(TEST_ACTOR, 8).await?, 0); assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![1, 2]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![1, 2]).await?.pages, vec![ FetchedPage { pgno: 1, diff --git a/engine/packages/sqlite-storage/src/ltx.rs b/engine/packages/sqlite-storage/src/ltx.rs index 5cc18b85b4..9c0f14e586 100644 --- a/engine/packages/sqlite-storage/src/ltx.rs +++ b/engine/packages/sqlite-storage/src/ltx.rs @@ -228,25 +228,26 @@ impl<'a> LtxDecoder<'a> { } pub fn decode(&self) -> Result { - self.decode_with_footer(self.bytes.len().saturating_sub(LTX_TRAILER_SIZE + 8)) - .or_else(|_| self.decode_with_footer(self.bytes.len().saturating_sub(8))) - } - - fn decode_with_footer(&self, footer_start: usize) -> Result { ensure!( - self.bytes.len() >= LTX_HEADER_SIZE + LTX_PAGE_HEADER_SIZE + std::mem::size_of::(), + self.bytes.len() + >= LTX_HEADER_SIZE + + LTX_PAGE_HEADER_SIZE + + std::mem::size_of::() + + LTX_TRAILER_SIZE, "ltx blob too small: {} bytes", self.bytes.len() ); let header = LtxHeader::decode(&self.bytes[..LTX_HEADER_SIZE])?; + let trailer_start = self.bytes.len() - LTX_TRAILER_SIZE; + let footer_start = trailer_start - std::mem::size_of::(); ensure!( - footer_start + std::mem::size_of::() <= self.bytes.len(), - "ltx footer starts outside blob" + self.bytes[trailer_start..].iter().all(|byte| *byte == 0), + "ltx trailer checksums must be zeroed" ); let index_size = u64::from_be_bytes( - self.bytes[footer_start..footer_start + std::mem::size_of::()] + self.bytes[footer_start..trailer_start] .try_into() .expect("ltx page index footer should be 8 bytes"), ) as usize; @@ -810,46 +811,18 @@ mod tests { } #[test] - fn decodes_legacy_blob_without_trailer() { + fn rejects_corrupt_trailer_or_index() { let encoded = LtxEncoder::new(sample_header()) .encode_with_index(&[DirtyPage { pgno: 7, bytes: repeated_page(0x77), }]) .expect("ltx should encode"); - let legacy_len = encoded.bytes.len() - LTX_TRAILER_SIZE; - let decoded = decode_ltx_v3(&encoded.bytes[..legacy_len]).expect("ltx should decode"); - assert_eq!(decoded.page_index, encoded.page_index); - assert_eq!(decoded.get_page(7), Some(repeated_page(0x77).as_slice())); - } - - #[test] - fn decodes_nonzero_trailer_bytes() { - let encoded = LtxEncoder::new(sample_header()) - .encode_with_index(&[DirtyPage { - pgno: 7, - bytes: repeated_page(0x77), - }]) - .expect("ltx should encode"); - - let mut checksum_trailer = encoded.bytes.clone(); - let trailer_idx = checksum_trailer.len() - 1; - checksum_trailer[trailer_idx] = 0x01; - - let decoded = decode_ltx_v3(&checksum_trailer).expect("ltx should decode"); - assert_eq!(decoded.page_index, encoded.page_index); - assert_eq!(decoded.get_page(7), Some(repeated_page(0x77).as_slice())); - } - - #[test] - fn rejects_corrupt_index() { - let encoded = LtxEncoder::new(sample_header()) - .encode_with_index(&[DirtyPage { - pgno: 7, - bytes: repeated_page(0x77), - }]) - .expect("ltx should encode"); + let mut bad_trailer = encoded.bytes.clone(); + let trailer_idx = bad_trailer.len() - 1; + bad_trailer[trailer_idx] = 0x01; + assert!(decode_ltx_v3(&bad_trailer).is_err()); let mut bad_index = encoded.bytes.clone(); let first_page_offset = encoded.page_index[0].offset as usize; diff --git a/engine/packages/sqlite-storage/src/optimization_flags.rs b/engine/packages/sqlite-storage/src/optimization_flags.rs index e0c4af00f0..f1cf589fa6 100644 --- a/engine/packages/sqlite-storage/src/optimization_flags.rs +++ b/engine/packages/sqlite-storage/src/optimization_flags.rs @@ -2,11 +2,8 @@ use std::{env, sync::OnceLock}; -pub const READ_AHEAD_ENV: &str = "RIVETKIT_SQLITE_OPT_READ_AHEAD"; -pub const CACHE_HIT_PREDICTOR_TRAINING_ENV: &str = - "RIVETKIT_SQLITE_OPT_CACHE_HIT_PREDICTOR_TRAINING"; +pub const READ_AHEAD_MODE_ENV: &str = "RIVETKIT_SQLITE_OPT_READ_AHEAD_MODE"; pub const RECENT_PAGE_HINTS_ENV: &str = "RIVETKIT_SQLITE_OPT_RECENT_PAGE_HINTS"; -pub const ADAPTIVE_READ_AHEAD_ENV: &str = "RIVETKIT_SQLITE_OPT_ADAPTIVE_READ_AHEAD"; pub const PRELOAD_HINT_FLUSH_ENV: &str = "RIVETKIT_SQLITE_OPT_PRELOAD_HINT_FLUSH"; pub const STARTUP_PRELOAD_MAX_BYTES_ENV: &str = "RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_MAX_BYTES"; pub const STARTUP_PRELOAD_FIRST_PAGES_ENV: &str = @@ -17,19 +14,17 @@ pub const PRELOAD_HINTS_ON_OPEN_ENV: &str = "RIVETKIT_SQLITE_OPT_PRELOAD_HINTS_O pub const PRELOAD_HINT_HOT_PAGES_ENV: &str = "RIVETKIT_SQLITE_OPT_PRELOAD_HINT_HOT_PAGES"; pub const PRELOAD_HINT_EARLY_PAGES_ENV: &str = "RIVETKIT_SQLITE_OPT_PRELOAD_HINT_EARLY_PAGES"; pub const PRELOAD_HINT_SCAN_RANGES_ENV: &str = "RIVETKIT_SQLITE_OPT_PRELOAD_HINT_SCAN_RANGES"; -pub const DEDUP_GET_PAGES_META_ENV: &str = "RIVETKIT_SQLITE_OPT_DEDUP_GET_PAGES_META"; pub const CACHE_GET_PAGES_VALIDATION_ENV: &str = "RIVETKIT_SQLITE_OPT_CACHE_GET_PAGES_VALIDATION"; pub const RANGE_READS_ENV: &str = "RIVETKIT_SQLITE_OPT_RANGE_READS"; pub const BATCH_CHUNK_READS_ENV: &str = "RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS"; pub const DECODED_LTX_CACHE_ENV: &str = "RIVETKIT_SQLITE_OPT_DECODED_LTX_CACHE"; +pub const VFS_PAGE_CACHE_MODE_ENV: &str = "RIVETKIT_SQLITE_OPT_VFS_PAGE_CACHE_MODE"; pub const VFS_PAGE_CACHE_CAPACITY_PAGES_ENV: &str = "RIVETKIT_SQLITE_OPT_VFS_PAGE_CACHE_CAPACITY_PAGES"; -pub const VFS_CACHE_FETCHED_PAGES_ENV: &str = "RIVETKIT_SQLITE_OPT_VFS_CACHE_FETCHED_PAGES"; -pub const VFS_CACHE_PREFETCHED_PAGES_ENV: &str = "RIVETKIT_SQLITE_OPT_VFS_CACHE_PREFETCHED_PAGES"; -pub const VFS_CACHE_STARTUP_PRELOADED_PAGES_ENV: &str = - "RIVETKIT_SQLITE_OPT_VFS_CACHE_STARTUP_PRELOADED_PAGES"; -pub const VFS_SCAN_RESISTANT_CACHE_ENV: &str = "RIVETKIT_SQLITE_OPT_VFS_SCAN_RESISTANT_CACHE"; pub const VFS_PROTECTED_CACHE_PAGES_ENV: &str = "RIVETKIT_SQLITE_OPT_VFS_PROTECTED_CACHE_PAGES"; +pub const SQLITE_READ_POOL_ENABLED_ENV: &str = "RIVETKIT_SQLITE_OPT_READ_POOL_ENABLED"; +pub const SQLITE_READ_POOL_MAX_READERS_ENV: &str = "RIVETKIT_SQLITE_OPT_READ_POOL_MAX_READERS"; +pub const SQLITE_READ_POOL_IDLE_TTL_MS_ENV: &str = "RIVETKIT_SQLITE_OPT_READ_POOL_IDLE_TTL_MS"; pub const DEFAULT_STARTUP_PRELOAD_MAX_BYTES: usize = 1024 * 1024; pub const MAX_STARTUP_PRELOAD_MAX_BYTES: usize = 8 * 1024 * 1024; @@ -39,13 +34,59 @@ pub const DEFAULT_VFS_PAGE_CACHE_CAPACITY_PAGES: u64 = 50_000; pub const MAX_VFS_PAGE_CACHE_CAPACITY_PAGES: u64 = 500_000; pub const DEFAULT_VFS_PROTECTED_CACHE_PAGES: usize = 512; pub const MAX_VFS_PROTECTED_CACHE_PAGES: usize = 8_192; +pub const DEFAULT_SQLITE_READ_POOL_MAX_READERS: usize = 4; +pub const MAX_SQLITE_READ_POOL_MAX_READERS: usize = 64; +pub const DEFAULT_SQLITE_READ_POOL_IDLE_TTL_MS: u64 = 60_000; +pub const MAX_SQLITE_READ_POOL_IDLE_TTL_MS: u64 = 3_600_000; + +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum SqliteReadAheadMode { + Off, + Bounded, + Adaptive, +} + +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum SqliteVfsPageCacheMode { + Off, + Target, + Startup, + Prefetch, + All, +} + +impl SqliteReadAheadMode { + pub fn uses_bounded_prefetch(self) -> bool { + matches!(self, Self::Bounded | Self::Adaptive) + } + + pub fn uses_adaptive_prefetch(self) -> bool { + matches!(self, Self::Adaptive) + } +} + +impl SqliteVfsPageCacheMode { + pub fn caches_any_pages(self) -> bool { + !matches!(self, Self::Off) + } + + pub fn caches_target_pages(self) -> bool { + matches!(self, Self::Target | Self::Startup | Self::Prefetch | Self::All) + } + + pub fn caches_prefetched_pages(self) -> bool { + matches!(self, Self::Prefetch | Self::All) + } + + pub fn caches_startup_preloaded_pages(self) -> bool { + matches!(self, Self::Startup | Self::All) + } +} #[derive(Debug, Clone, Copy, PartialEq, Eq)] pub struct SqliteOptimizationFlags { - pub read_ahead: bool, - pub cache_hit_predictor_training: bool, + pub read_ahead_mode: SqliteReadAheadMode, pub recent_page_hints: bool, - pub adaptive_read_ahead: bool, pub preload_hint_flush: bool, pub startup_preload_max_bytes: usize, pub startup_preload_first_pages: bool, @@ -54,26 +95,23 @@ pub struct SqliteOptimizationFlags { pub preload_hint_hot_pages: bool, pub preload_hint_early_pages: bool, pub preload_hint_scan_ranges: bool, - pub dedup_get_pages_meta: bool, pub cache_get_pages_validation: bool, pub range_reads: bool, pub batch_chunk_reads: bool, pub decoded_ltx_cache: bool, + pub vfs_page_cache_mode: SqliteVfsPageCacheMode, pub vfs_page_cache_capacity_pages: u64, - pub vfs_cache_fetched_pages: bool, - pub vfs_cache_prefetched_pages: bool, - pub vfs_cache_startup_preloaded_pages: bool, - pub vfs_scan_resistant_cache: bool, pub vfs_protected_cache_pages: usize, + pub sqlite_read_pool_enabled: bool, + pub sqlite_read_pool_max_readers: usize, + pub sqlite_read_pool_idle_ttl_ms: u64, } impl Default for SqliteOptimizationFlags { fn default() -> Self { Self { - read_ahead: true, - cache_hit_predictor_training: true, + read_ahead_mode: SqliteReadAheadMode::Adaptive, recent_page_hints: true, - adaptive_read_ahead: true, preload_hint_flush: true, startup_preload_max_bytes: DEFAULT_STARTUP_PRELOAD_MAX_BYTES, startup_preload_first_pages: true, @@ -82,17 +120,16 @@ impl Default for SqliteOptimizationFlags { preload_hint_hot_pages: true, preload_hint_early_pages: true, preload_hint_scan_ranges: true, - dedup_get_pages_meta: true, cache_get_pages_validation: true, range_reads: true, batch_chunk_reads: true, decoded_ltx_cache: true, + vfs_page_cache_mode: SqliteVfsPageCacheMode::All, vfs_page_cache_capacity_pages: DEFAULT_VFS_PAGE_CACHE_CAPACITY_PAGES, - vfs_cache_fetched_pages: true, - vfs_cache_prefetched_pages: true, - vfs_cache_startup_preloaded_pages: true, - vfs_scan_resistant_cache: true, vfs_protected_cache_pages: DEFAULT_VFS_PROTECTED_CACHE_PAGES, + sqlite_read_pool_enabled: true, + sqlite_read_pool_max_readers: DEFAULT_SQLITE_READ_POOL_MAX_READERS, + sqlite_read_pool_idle_ttl_ms: DEFAULT_SQLITE_READ_POOL_IDLE_TTL_MS, } } } @@ -104,12 +141,11 @@ impl SqliteOptimizationFlags { pub fn from_env_reader(mut read_env: impl FnMut(&str) -> Option) -> Self { Self { - read_ahead: enabled_by_default(read_env(READ_AHEAD_ENV).as_deref()), - cache_hit_predictor_training: enabled_by_default( - read_env(CACHE_HIT_PREDICTOR_TRAINING_ENV).as_deref(), + read_ahead_mode: read_ahead_mode_by_default( + read_env(READ_AHEAD_MODE_ENV).as_deref(), + SqliteReadAheadMode::Adaptive, ), recent_page_hints: enabled_by_default(read_env(RECENT_PAGE_HINTS_ENV).as_deref()), - adaptive_read_ahead: enabled_by_default(read_env(ADAPTIVE_READ_AHEAD_ENV).as_deref()), preload_hint_flush: enabled_by_default(read_env(PRELOAD_HINT_FLUSH_ENV).as_deref()), startup_preload_max_bytes: usize_bounded_by_default( read_env(STARTUP_PRELOAD_MAX_BYTES_ENV).as_deref(), @@ -134,35 +170,39 @@ impl SqliteOptimizationFlags { preload_hint_scan_ranges: enabled_by_default( read_env(PRELOAD_HINT_SCAN_RANGES_ENV).as_deref(), ), - dedup_get_pages_meta: enabled_by_default(read_env(DEDUP_GET_PAGES_META_ENV).as_deref()), cache_get_pages_validation: enabled_by_default( read_env(CACHE_GET_PAGES_VALIDATION_ENV).as_deref(), ), range_reads: enabled_by_default(read_env(RANGE_READS_ENV).as_deref()), batch_chunk_reads: enabled_by_default(read_env(BATCH_CHUNK_READS_ENV).as_deref()), decoded_ltx_cache: enabled_by_default(read_env(DECODED_LTX_CACHE_ENV).as_deref()), + vfs_page_cache_mode: vfs_page_cache_mode_by_default( + read_env(VFS_PAGE_CACHE_MODE_ENV).as_deref(), + SqliteVfsPageCacheMode::All, + ), vfs_page_cache_capacity_pages: u64_bounded_by_default( read_env(VFS_PAGE_CACHE_CAPACITY_PAGES_ENV).as_deref(), DEFAULT_VFS_PAGE_CACHE_CAPACITY_PAGES, MAX_VFS_PAGE_CACHE_CAPACITY_PAGES, ), - vfs_cache_fetched_pages: enabled_by_default( - read_env(VFS_CACHE_FETCHED_PAGES_ENV).as_deref(), - ), - vfs_cache_prefetched_pages: enabled_by_default( - read_env(VFS_CACHE_PREFETCHED_PAGES_ENV).as_deref(), - ), - vfs_cache_startup_preloaded_pages: enabled_by_default( - read_env(VFS_CACHE_STARTUP_PRELOADED_PAGES_ENV).as_deref(), - ), - vfs_scan_resistant_cache: enabled_by_default( - read_env(VFS_SCAN_RESISTANT_CACHE_ENV).as_deref(), - ), vfs_protected_cache_pages: usize_bounded_by_default( read_env(VFS_PROTECTED_CACHE_PAGES_ENV).as_deref(), DEFAULT_VFS_PROTECTED_CACHE_PAGES, MAX_VFS_PROTECTED_CACHE_PAGES, ), + sqlite_read_pool_enabled: enabled_by_default( + read_env(SQLITE_READ_POOL_ENABLED_ENV).as_deref(), + ), + sqlite_read_pool_max_readers: usize_bounded_by_default( + read_env(SQLITE_READ_POOL_MAX_READERS_ENV).as_deref(), + DEFAULT_SQLITE_READ_POOL_MAX_READERS, + MAX_SQLITE_READ_POOL_MAX_READERS, + ), + sqlite_read_pool_idle_ttl_ms: u64_bounded_by_default( + read_env(SQLITE_READ_POOL_IDLE_TTL_MS_ENV).as_deref(), + DEFAULT_SQLITE_READ_POOL_IDLE_TTL_MS, + MAX_SQLITE_READ_POOL_IDLE_TTL_MS, + ), } } } @@ -207,6 +247,50 @@ fn u32_bounded_by_default(value: Option<&str>, default: u32, max: u32) -> u32 { .min(max) } +fn read_ahead_mode_by_default( + value: Option<&str>, + default: SqliteReadAheadMode, +) -> SqliteReadAheadMode { + match value.map(|value| value.trim().to_ascii_lowercase()) { + Some(value) + if matches!( + value.as_str(), + "off" | "0" | "false" | "no" | "disabled" | "disable" + ) => + { + SqliteReadAheadMode::Off + } + Some(value) if value == "bounded" => SqliteReadAheadMode::Bounded, + Some(value) if value == "adaptive" || value == "on" || value == "true" || value == "1" => { + SqliteReadAheadMode::Adaptive + } + _ => default, + } +} + +fn vfs_page_cache_mode_by_default( + value: Option<&str>, + default: SqliteVfsPageCacheMode, +) -> SqliteVfsPageCacheMode { + match value.map(|value| value.trim().to_ascii_lowercase()) { + Some(value) + if matches!( + value.as_str(), + "off" | "0" | "false" | "no" | "disabled" | "disable" + ) => + { + SqliteVfsPageCacheMode::Off + } + Some(value) if value == "target" => SqliteVfsPageCacheMode::Target, + Some(value) if value == "startup" => SqliteVfsPageCacheMode::Startup, + Some(value) if value == "prefetch" => SqliteVfsPageCacheMode::Prefetch, + Some(value) if value == "all" || value == "on" || value == "true" || value == "1" => { + SqliteVfsPageCacheMode::All + } + _ => default, + } +} + #[cfg(test)] mod tests { use super::*; @@ -214,43 +298,49 @@ mod tests { #[test] fn flags_default_enabled_and_explicitly_disableable() { let flags = SqliteOptimizationFlags::from_env_reader(|key| match key { - READ_AHEAD_ENV => Some("false".to_string()), + READ_AHEAD_MODE_ENV => Some("off".to_string()), RECENT_PAGE_HINTS_ENV => Some("0".to_string()), - STARTUP_PRELOAD_MAX_BYTES_ENV => Some("2048".to_string()), + PRELOAD_HINT_FLUSH_ENV => Some("false".to_string()), + STARTUP_PRELOAD_MAX_BYTES_ENV => Some("0".to_string()), STARTUP_PRELOAD_FIRST_PAGES_ENV => Some("false".to_string()), - STARTUP_PRELOAD_FIRST_PAGE_COUNT_ENV => Some("2".to_string()), + STARTUP_PRELOAD_FIRST_PAGE_COUNT_ENV => Some("0".to_string()), + PRELOAD_HINTS_ON_OPEN_ENV => Some("false".to_string()), + PRELOAD_HINT_HOT_PAGES_ENV => Some("false".to_string()), + PRELOAD_HINT_EARLY_PAGES_ENV => Some("false".to_string()), PRELOAD_HINT_SCAN_RANGES_ENV => Some("disabled".to_string()), CACHE_GET_PAGES_VALIDATION_ENV => Some("off".to_string()), + RANGE_READS_ENV => Some("false".to_string()), BATCH_CHUNK_READS_ENV => Some("no".to_string()), DECODED_LTX_CACHE_ENV => Some("disable".to_string()), - VFS_PAGE_CACHE_CAPACITY_PAGES_ENV => Some("128".to_string()), - VFS_CACHE_FETCHED_PAGES_ENV => Some("false".to_string()), - VFS_CACHE_PREFETCHED_PAGES_ENV => Some("false".to_string()), - VFS_CACHE_STARTUP_PRELOADED_PAGES_ENV => Some("false".to_string()), - VFS_SCAN_RESISTANT_CACHE_ENV => Some("false".to_string()), - VFS_PROTECTED_CACHE_PAGES_ENV => Some("16".to_string()), + VFS_PAGE_CACHE_MODE_ENV => Some("off".to_string()), + VFS_PAGE_CACHE_CAPACITY_PAGES_ENV => Some("0".to_string()), + VFS_PROTECTED_CACHE_PAGES_ENV => Some("0".to_string()), + SQLITE_READ_POOL_ENABLED_ENV => Some("false".to_string()), + SQLITE_READ_POOL_MAX_READERS_ENV => Some("0".to_string()), + SQLITE_READ_POOL_IDLE_TTL_MS_ENV => Some("0".to_string()), _ => None, }); - assert!(!flags.read_ahead); - assert!(flags.cache_hit_predictor_training); + assert_eq!(flags.read_ahead_mode, SqliteReadAheadMode::Off); assert!(!flags.recent_page_hints); - assert_eq!(flags.startup_preload_max_bytes, 2048); + assert!(!flags.preload_hint_flush); + assert_eq!(flags.startup_preload_max_bytes, 0); assert!(!flags.startup_preload_first_pages); - assert_eq!(flags.startup_preload_first_page_count, 2); - assert!(flags.preload_hint_hot_pages); - assert!(flags.preload_hint_early_pages); + assert_eq!(flags.startup_preload_first_page_count, 0); + assert!(!flags.preload_hints_on_open); + assert!(!flags.preload_hint_hot_pages); + assert!(!flags.preload_hint_early_pages); assert!(!flags.preload_hint_scan_ranges); assert!(!flags.cache_get_pages_validation); - assert!(flags.range_reads); + assert!(!flags.range_reads); assert!(!flags.batch_chunk_reads); assert!(!flags.decoded_ltx_cache); - assert_eq!(flags.vfs_page_cache_capacity_pages, 128); - assert!(!flags.vfs_cache_fetched_pages); - assert!(!flags.vfs_cache_prefetched_pages); - assert!(!flags.vfs_cache_startup_preloaded_pages); - assert!(!flags.vfs_scan_resistant_cache); - assert_eq!(flags.vfs_protected_cache_pages, 16); + assert_eq!(flags.vfs_page_cache_mode, SqliteVfsPageCacheMode::Off); + assert_eq!(flags.vfs_page_cache_capacity_pages, 0); + assert_eq!(flags.vfs_protected_cache_pages, 0); + assert!(!flags.sqlite_read_pool_enabled); + assert_eq!(flags.sqlite_read_pool_max_readers, 0); + assert_eq!(flags.sqlite_read_pool_idle_ttl_ms, 0); } #[test] @@ -260,6 +350,8 @@ mod tests { STARTUP_PRELOAD_FIRST_PAGE_COUNT_ENV => Some("nope".to_string()), VFS_PAGE_CACHE_CAPACITY_PAGES_ENV => Some("invalid".to_string()), VFS_PROTECTED_CACHE_PAGES_ENV => Some("invalid".to_string()), + SQLITE_READ_POOL_MAX_READERS_ENV => Some("invalid".to_string()), + SQLITE_READ_POOL_IDLE_TTL_MS_ENV => Some("invalid".to_string()), _ => None, }); assert_eq!( @@ -278,6 +370,15 @@ mod tests { invalid.vfs_protected_cache_pages, DEFAULT_VFS_PROTECTED_CACHE_PAGES ); + assert!(invalid.sqlite_read_pool_enabled); + assert_eq!( + invalid.sqlite_read_pool_max_readers, + DEFAULT_SQLITE_READ_POOL_MAX_READERS + ); + assert_eq!( + invalid.sqlite_read_pool_idle_ttl_ms, + DEFAULT_SQLITE_READ_POOL_IDLE_TTL_MS + ); let clamped = SqliteOptimizationFlags::from_env_reader(|key| match key { STARTUP_PRELOAD_MAX_BYTES_ENV => Some((MAX_STARTUP_PRELOAD_MAX_BYTES + 1).to_string()), @@ -288,6 +389,12 @@ mod tests { Some((MAX_VFS_PAGE_CACHE_CAPACITY_PAGES + 1).to_string()) } VFS_PROTECTED_CACHE_PAGES_ENV => Some((MAX_VFS_PROTECTED_CACHE_PAGES + 1).to_string()), + SQLITE_READ_POOL_MAX_READERS_ENV => { + Some((MAX_SQLITE_READ_POOL_MAX_READERS + 1).to_string()) + } + SQLITE_READ_POOL_IDLE_TTL_MS_ENV => { + Some((MAX_SQLITE_READ_POOL_IDLE_TTL_MS + 1).to_string()) + } _ => None, }); assert_eq!( @@ -306,5 +413,13 @@ mod tests { clamped.vfs_protected_cache_pages, MAX_VFS_PROTECTED_CACHE_PAGES ); + assert_eq!( + clamped.sqlite_read_pool_max_readers, + MAX_SQLITE_READ_POOL_MAX_READERS + ); + assert_eq!( + clamped.sqlite_read_pool_idle_ttl_ms, + MAX_SQLITE_READ_POOL_IDLE_TTL_MS + ); } } diff --git a/engine/packages/sqlite-storage/src/read.rs b/engine/packages/sqlite-storage/src/read.rs index 92ece6130d..1287a8d4cb 100644 --- a/engine/packages/sqlite-storage/src/read.rs +++ b/engine/packages/sqlite-storage/src/read.rs @@ -721,7 +721,7 @@ mod tests { .await?; engine.open(TEST_ACTOR, OpenConfig::new(0)).await?; clear_op_count(&engine); - let pages = engine.get_pages(TEST_ACTOR, 4, vec![1, 2, 4]).await?; + let pages = engine.get_pages(TEST_ACTOR, 4, vec![1, 2, 4]).await?.pages; assert_eq!( pages, @@ -946,7 +946,7 @@ mod tests { .await?; engine.open(TEST_ACTOR, OpenConfig::new(0)).await?; clear_op_count(&engine); - let pages = engine.get_pages(TEST_ACTOR, 4, vec![2, 65]).await?; + let pages = engine.get_pages(TEST_ACTOR, 4, vec![2, 65]).await?.pages; assert_eq!( pages, @@ -993,9 +993,9 @@ mod tests { engine.open(TEST_ACTOR, OpenConfig::new(0)).await?; engine.reset_ltx_decode_count(); - let pages = engine.get_pages(TEST_ACTOR, 4, vec![2, 65]).await?; + let pages = engine.get_pages(TEST_ACTOR, 4, vec![2, 65]).await?.pages; assert_eq!( - pages.pages, + pages, vec![ FetchedPage { pgno: 2, @@ -1010,9 +1010,9 @@ mod tests { assert_eq!(engine.ltx_decode_count(), 2); engine.reset_ltx_decode_count(); - let pages = engine.get_pages(TEST_ACTOR, 4, vec![2, 65]).await?; + let pages = engine.get_pages(TEST_ACTOR, 4, vec![2, 65]).await?.pages; assert_eq!( - pages.pages, + pages, vec![ FetchedPage { pgno: 2, @@ -1060,7 +1060,7 @@ mod tests { engine.reset_ltx_decode_count(); assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![2]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![2]).await?.pages, vec![FetchedPage { pgno: 2, bytes: Some(page(0x24)), @@ -1070,7 +1070,7 @@ mod tests { engine.reset_ltx_decode_count(); assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![2]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![2]).await?.pages, vec![FetchedPage { pgno: 2, bytes: Some(page(0x24)), @@ -1104,7 +1104,7 @@ mod tests { ) .await?; engine.open(TEST_ACTOR, OpenConfig::new(0)).await?; - let warmed_pages = engine.get_pages(TEST_ACTOR, 4, vec![3]).await?; + let warmed_pages = engine.get_pages(TEST_ACTOR, 4, vec![3]).await?.pages; assert_eq!( warmed_pages, vec![FetchedPage { @@ -1115,7 +1115,7 @@ mod tests { clear_op_count(&engine); - let pages = engine.get_pages(TEST_ACTOR, 4, vec![3]).await?; + let pages = engine.get_pages(TEST_ACTOR, 4, vec![3]).await?.pages; assert_eq!( pages, vec![FetchedPage { @@ -1154,7 +1154,7 @@ mod tests { .await?; engine.open(TEST_ACTOR, OpenConfig::new(0)).await?; assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![3]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![3]).await?.pages, vec![FetchedPage { pgno: 3, bytes: Some(page(0x33)), @@ -1175,7 +1175,7 @@ mod tests { clear_op_count(&engine); assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![3]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![3]).await?.pages, vec![FetchedPage { pgno: 3, bytes: Some(page(0x44)), @@ -1211,7 +1211,7 @@ mod tests { .await?; engine.open(TEST_ACTOR, OpenConfig::new(0)).await?; assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![3]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![3]).await?.pages, vec![FetchedPage { pgno: 3, bytes: Some(page(0x33)), @@ -1234,7 +1234,7 @@ mod tests { clear_op_count(&engine); assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![3]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![3]).await?.pages, vec![FetchedPage { pgno: 3, bytes: Some(page(0x44)), @@ -1243,7 +1243,7 @@ mod tests { clear_op_count(&engine); assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![3]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![3]).await?.pages, vec![FetchedPage { pgno: 3, bytes: Some(page(0x44)), @@ -1276,7 +1276,7 @@ mod tests { engine.open(TEST_ACTOR, OpenConfig::new(0)).await?; assert_eq!( - engine.get_pages(TEST_ACTOR, 4, vec![3]).await?, + engine.get_pages(TEST_ACTOR, 4, vec![3]).await?.pages, vec![FetchedPage { pgno: 3, bytes: Some(vec![0; SQLITE_PAGE_SIZE as usize]), diff --git a/engine/packages/sqlite-storage/src/types.rs b/engine/packages/sqlite-storage/src/types.rs index 08e9ded48e..8db3f76481 100644 --- a/engine/packages/sqlite-storage/src/types.rs +++ b/engine/packages/sqlite-storage/src/types.rs @@ -7,7 +7,6 @@ use anyhow::Result; use serde::{Deserialize, Serialize}; -use std::ops::Deref; pub use rivet_sqlite_storage_protocol::{DBHead, PreloadHintRange, PreloadHints, SqliteOrigin}; use rivet_sqlite_storage_protocol::versioned; @@ -62,35 +61,6 @@ pub struct GetPagesResult { pub meta: SqliteMeta, } -impl Deref for GetPagesResult { - type Target = [FetchedPage]; - - fn deref(&self) -> &Self::Target { - &self.pages - } -} - -impl IntoIterator for GetPagesResult { - type Item = FetchedPage; - type IntoIter = std::vec::IntoIter; - - fn into_iter(self) -> Self::IntoIter { - self.pages.into_iter() - } -} - -impl PartialEq> for GetPagesResult { - fn eq(&self, other: &Vec) -> bool { - &self.pages == other - } -} - -impl PartialEq for Vec { - fn eq(&self, other: &GetPagesResult) -> bool { - self == &other.pages - } -} - #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)] pub struct SqliteMeta { pub schema_version: u32, diff --git a/engine/packages/sqlite-storage/src/udb.rs b/engine/packages/sqlite-storage/src/udb.rs index b99e3a2e9f..66c9c84122 100644 --- a/engine/packages/sqlite-storage/src/udb.rs +++ b/engine/packages/sqlite-storage/src/udb.rs @@ -501,9 +501,9 @@ mod tests { } #[tokio::test] - async fn disabled_batch_chunk_reads_use_compatible_serial_chunks() -> Result<()> { + async fn disabled_batch_chunk_reads_use_serial_chunks() -> Result<()> { let (db, subspace, op_counter) = setup_db().await?; - let key = b"legacy-large-source-blob".to_vec(); + let key = b"serial-large-source-blob".to_vec(); let value = vec![0x42; INLINE_VALUE_LIMIT + VALUE_CHUNK_SIZE * 2 + 1]; let chunk_count = value.len().div_ceil(VALUE_CHUNK_SIZE); let flags = SqliteOptimizationFlags { diff --git a/engine/packages/sqlite-storage/tests/concurrency.rs b/engine/packages/sqlite-storage/tests/concurrency.rs index 7256cb80ae..05f2a5027d 100644 --- a/engine/packages/sqlite-storage/tests/concurrency.rs +++ b/engine/packages/sqlite-storage/tests/concurrency.rs @@ -74,7 +74,7 @@ async fn concurrent_commits_to_different_actors_preserve_isolation() -> Result<( while let Some(result) = commits.join_next().await { let (actor_id, generation, fill) = result??; - let pages = engine.get_pages(&actor_id, generation, vec![1]).await?; + let pages = engine.get_pages(&actor_id, generation, vec![1]).await?.pages; assert_eq!(pages[0].bytes, Some(page(fill))); } @@ -102,7 +102,8 @@ async fn interleaved_commit_compaction_read_keeps_latest_page_visible() -> Resul let after_compaction = engine .get_pages(actor_id, open.generation, vec![1, 2]) - .await?; + .await? + .pages; assert_eq!(after_compaction[0].bytes, Some(page(0x11))); assert_eq!(after_compaction[1].bytes, Some(page(0x11))); @@ -121,7 +122,8 @@ async fn interleaved_commit_compaction_read_keeps_latest_page_visible() -> Resul let latest = engine .get_pages(actor_id, open.generation, vec![1, 2, 3]) - .await?; + .await? + .pages; assert_eq!(latest[0].bytes, Some(page(0x44))); assert_eq!(latest[1].bytes, Some(page(0x44))); assert_eq!(latest[2].bytes, Some(page(0x11))); @@ -160,7 +162,8 @@ async fn concurrent_reads_during_compaction_keep_returning_expected_pages() -> R generation, vec![1, 2, 65, 66, 129, 130, 193, 194], ) - .await?; + .await? + .pages; assert_eq!(warmup[0].bytes, Some(page(0x10))); assert_eq!(warmup[2].bytes, Some(page(0x20))); assert_eq!(warmup[4].bytes, Some(page(0x30))); @@ -193,7 +196,8 @@ async fn concurrent_reads_during_compaction_keep_returning_expected_pages() -> R generation, vec![1, 2, 65, 66, 129, 130, 193, 194], ) - .await?; + .await? + .pages; assert_eq!(pages[0].bytes, Some(page(0x10))); assert_eq!(pages[1].bytes, Some(page(0x10))); assert_eq!(pages[2].bytes, Some(page(0x20))); @@ -215,7 +219,8 @@ async fn concurrent_reads_during_compaction_keep_returning_expected_pages() -> R let final_pages = engine .get_pages(&actor_id, generation, vec![1, 65, 129, 193]) - .await?; + .await? + .pages; assert_eq!(final_pages[0].bytes, Some(page(0x10))); assert_eq!(final_pages[1].bytes, Some(page(0x20))); assert_eq!(final_pages[2].bytes, Some(page(0x30))); diff --git a/engine/packages/sqlite-storage/tests/latency.rs b/engine/packages/sqlite-storage/tests/latency.rs index 03fda73c29..20a35fdd9c 100644 --- a/engine/packages/sqlite-storage/tests/latency.rs +++ b/engine/packages/sqlite-storage/tests/latency.rs @@ -103,7 +103,7 @@ async fn latency_paths_use_single_rtt_under_simulated_udb_latency() -> Result<() assert_eq!(pages.meta.generation, open.generation); assert_eq!(pages.meta.head_txid, commit.txid); assert_eq!(pages.meta.db_size_pages, 10); - assert!(pages.iter().all(|page| page.bytes.is_some())); + assert!(pages.pages.iter().all(|page| page.bytes.is_some())); assert_eq!(engine.op_counter.load(Ordering::SeqCst), 1); assert_single_rtt("get_pages", elapsed); } diff --git a/examples/CLAUDE.md b/examples/CLAUDE.md index 751d17e2de..db67b29e2e 100644 --- a/examples/CLAUDE.md +++ b/examples/CLAUDE.md @@ -2,6 +2,7 @@ - Follow these guidelines when creating and maintaining examples in this repository. - Keep `onStateChange` examples read-only against `c.state`; use `vars` for callback counters or derived runtime-only values. +- Kitchen-sink SQLite real-world benchmark changes must keep the runner and actor `WORKLOADS` catalogs in sync and keep read-pool route metrics visible in `summary.md`. ## README Format diff --git a/examples/kitchen-sink/CLAUDE.md b/examples/kitchen-sink/CLAUDE.md index 2671a4faad..e1c9ca1ddd 100644 --- a/examples/kitchen-sink/CLAUDE.md +++ b/examples/kitchen-sink/CLAUDE.md @@ -112,6 +112,10 @@ The kitchen-sink has three SQLite actor types to test: - The default SQLite cold-start benchmark runs un-compacted and compacted scenarios separately; keep both on inline transaction sizes unless chunked DELTA reads are being explicitly tested. - Use `cold_start_reverse_probe` for reverse VFS scan measurements; large payload overflow rows create scattered reverse page access. +### `scripts/sqlite-realworld-bench.ts` — SQLite real-world harness + +- Measure only server-reported SQLite time for the cold-wake main phase; write comparable JSON results under `.agent/benchmarks/sqlite-realworld/`. + ### `scripts/soak.ts` — Cloud Run soak harness - Drives sustained workload against the live `kitchen-sink-staging` Cloud Run service to verify correctness, validate autoscale, and detect memory leaks in unstable rivetkit code. diff --git a/examples/kitchen-sink/package.json b/examples/kitchen-sink/package.json index 9670e86a60..40a16bb14b 100644 --- a/examples/kitchen-sink/package.json +++ b/examples/kitchen-sink/package.json @@ -8,6 +8,7 @@ "dev": "concurrently -n server,vite \"node --import @rivetkit/sql-loader --import tsx src/server.ts\" \"vite\"", "check-types": "echo 'skipped - workflow history types broken'", "build": "vite build", + "test": "node --import tsx --test tests/*.test.ts", "start": "node --import @rivetkit/sql-loader --import tsx src/server.ts", "smoke:raw-websocket-serverless": "tsx scripts/raw-websocket-serverless-smoke.ts", "benchmark": "tsx scripts/benchmark.ts", diff --git a/examples/kitchen-sink/scripts/sqlite-realworld-bench.ts b/examples/kitchen-sink/scripts/sqlite-realworld-bench.ts new file mode 100644 index 0000000000..a976379f04 --- /dev/null +++ b/examples/kitchen-sink/scripts/sqlite-realworld-bench.ts @@ -0,0 +1,1279 @@ +#!/usr/bin/env -S pnpm exec tsx + +import { spawn, type ChildProcess } from "node:child_process"; +import { existsSync, mkdirSync, mkdtempSync, rmSync, writeFileSync } from "node:fs"; +import { createServer } from "node:net"; +import { tmpdir } from "node:os"; +import { join, resolve } from "node:path"; +import { fileURLToPath } from "node:url"; +import { createClient } from "rivetkit/client"; +import type { registry } from "../src/index.ts"; + +const DEFAULT_ENDPOINT = "http://127.0.0.1:6420"; +const DEFAULT_WAKE_DELAY_MS = 2000; +const DEFAULT_POST_SETUP_WAIT_MS = 0; +const DEFAULT_ROW_BYTES = 2 * 1024; +const SQLITE_PAGE_SIZE_BYTES = 4096; +const DEFAULT_STARTUP_PRELOAD_MAX_BYTES = 1024 * 1024; +const DEFAULT_VFS_PAGE_CACHE_CAPACITY_PAGES = 50_000; +const REPO_ENGINE_BINARY = fileURLToPath( + new URL("../../../target/debug/rivet-engine", import.meta.url), +); +const REPO_ROOT = fileURLToPath(new URL("../../..", import.meta.url)); +const DEFAULT_RESULTS_ROOT = ".agent/benchmarks/sqlite-realworld"; +const SQLITE_OPT_MODE_ENVS = [ + "RIVETKIT_SQLITE_OPT_READ_AHEAD_MODE", + "RIVETKIT_SQLITE_OPT_VFS_PAGE_CACHE_MODE", +] as const; +const SQLITE_OPT_BOOLEAN_ENVS = [ + "RIVETKIT_SQLITE_OPT_RECENT_PAGE_HINTS", + "RIVETKIT_SQLITE_OPT_PRELOAD_HINT_FLUSH", + "RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_FIRST_PAGES", + "RIVETKIT_SQLITE_OPT_PRELOAD_HINTS_ON_OPEN", + "RIVETKIT_SQLITE_OPT_PRELOAD_HINT_HOT_PAGES", + "RIVETKIT_SQLITE_OPT_PRELOAD_HINT_EARLY_PAGES", + "RIVETKIT_SQLITE_OPT_PRELOAD_HINT_SCAN_RANGES", + "RIVETKIT_SQLITE_OPT_CACHE_GET_PAGES_VALIDATION", + "RIVETKIT_SQLITE_OPT_RANGE_READS", + "RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS", + "RIVETKIT_SQLITE_OPT_DECODED_LTX_CACHE", + "RIVETKIT_SQLITE_OPT_READ_POOL_ENABLED", +] as const; +const SQLITE_OPT_NUMERIC_ENVS = [ + "RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_MAX_BYTES", + "RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_FIRST_PAGE_COUNT", + "RIVETKIT_SQLITE_OPT_VFS_PAGE_CACHE_CAPACITY_PAGES", + "RIVETKIT_SQLITE_OPT_VFS_PROTECTED_CACHE_PAGES", + "RIVETKIT_SQLITE_OPT_READ_POOL_MAX_READERS", + "RIVETKIT_SQLITE_OPT_READ_POOL_IDLE_TTL_MS", +] as const; + +const WORKLOADS = [ + "small-rowid-point", + "small-schema-read", + "small-range-scan", + "rowid-range-forward", + "rowid-range-backward", + "secondary-index-covering-range", + "secondary-index-scattered-table", + "aggregate-status", + "aggregate-time-bucket", + "aggregate-tenant-time-range", + "parallel-read-aggregates", + "parallel-read-write-transition", + "feed-order-by-limit", + "feed-pagination-adjacent", + "join-order-items", + "random-point-lookups", + "hot-index-cold-table", + "ledger-without-rowid-range", + "write-batch-after-wake", + "update-hot-partition", + "delete-churn-range-read", + "migration-create-indexes-large", + "migration-create-indexes-skewed-large", + "migration-table-rebuild-large", + "migration-add-column-large", + "migration-ddl-small", +] as const; + +type WorkloadName = (typeof WORKLOADS)[number]; +type SizeClass = "none" | "small" | "medium" | "cache-fit" | "cache-overflow" | "large"; +type Profile = "standard" | "smoke"; +type WorkloadCategory = "read" | "write" | "migration" | "canary"; + +interface Args { + endpoint: string; + key: string; + profile: Profile; + only: WorkloadName[]; + smallBytes: number; + mediumBytes: number; + cacheFitBytes: number; + cacheOverflowBytes: number; + largeBytes: number; + rowBytes: number; + wakeDelayMs: number; + postSetupWaitMs: number; + outputDir: string; + metricsToken: string; + disableMetadataLookup: boolean; + startLocalEnvoy: boolean; + disableStorageCompaction: boolean; + disableSqliteOptimizations: boolean; +} + +interface LocalEngine { + child: ChildProcess; + dbRoot: string; + logs: string[]; +} + +interface WorkloadSpec { + name: WorkloadName; + category: WorkloadCategory; + sizeClass: SizeClass; + description: string; +} + +interface SetupResult { + rows: number; + targetBytes: number; + rowBytes: number; + setupMs: number; + pageCount: number; +} + +interface MainResult { + ms: number; + workload: WorkloadName; + pageCount: number; + [key: string]: unknown; +} + +interface CacheConfigResult { + sqliteCacheSizePragma: number | null; + sqlitePageSize: number | null; + pageCount: number; +} + +interface BenchmarkResult { + workload: WorkloadName; + description: string; + category: WorkloadCategory; + sizeClass: SizeClass; + targetBytes: number; + actorKey: string[]; + actorId: string; + setup: SetupResult | null; + main: MainResult; + vfsMetrics: VfsMetricSnapshot; + readPoolMetrics: ReadPoolMetricSnapshot; +} + +interface VfsMetricSnapshot { + resolvePagesTotal: number; + resolvePagesRequestedTotal: number; + resolvePagesCacheHitsTotal: number; + resolvePagesCacheMissesTotal: number; + getPagesTotal: number; + pagesFetchedTotal: number; + prefetchPagesTotal: number; + bytesFetchedTotal: number; + prefetchBytesTotal: number; + getPagesDurationSecondsSum: number; + getPagesDurationSecondsCount: number; +} + +interface ReadPoolMetricSnapshot { + activeReaders: number; + idleReaders: number; + readWaitDurationSecondsSum: number; + readWaitDurationSecondsCount: number; + writeWaitDurationSecondsSum: number; + writeWaitDurationSecondsCount: number; + routedReadQueriesTotal: number; + writeFallbackQueriesTotal: number; + manualTransactionDurationSecondsSum: number; + manualTransactionDurationSecondsCount: number; + readerOpensTotal: number; + readerClosesTotal: number; + rejectedReaderMutationsTotal: number; + modeTransitionsTotal: number; +} + +const WORKLOAD_SPECS: WorkloadSpec[] = [ + { + // Included to keep tiny actor databases honest while we optimize larger datasets. + // Startup preload and the first few VFS pages should cover most metadata, and the point reads should be page-cache friendly. + name: "small-rowid-point", + category: "canary", + sizeClass: "small", + description: "Small cold-wake primary-key point reads.", + }, + { + // Included because many apps hit schema/catalog pages immediately after opening SQLite. + // Schema and root pages should be strong startup preload and protected-cache candidates. + name: "small-schema-read", + category: "canary", + sizeClass: "small", + description: "Small cold-wake schema and table metadata read.", + }, + { + // Included to verify read-ahead and preload logic do not add overhead to small table scans. + // The full dataset should fit in cache, so read-ahead should stay cheap and avoid material overfetch. + name: "small-range-scan", + category: "canary", + sizeClass: "small", + description: "Small rowid range scan to catch regressions on tiny databases.", + }, + { + // Included for append-heavy product tables where rowid order often maps well to physical page locality. + // Adaptive forward read-ahead should reduce VFS round trips with little random access. + name: "rowid-range-forward", + category: "read", + sizeClass: "large", + description: "Large append-like INTEGER PRIMARY KEY forward range scan.", + }, + { + // Included because feeds and history views often scan newest-to-oldest. + // Backward read-ahead should detect decreasing page access and avoid many small fetches. + name: "rowid-range-backward", + category: "read", + sizeClass: "large", + description: "Large append-like INTEGER PRIMARY KEY reverse range scan.", + }, + { + // Included to isolate index-only range reads from table hydration. + // Most work should stay in index pages, giving compact access compared with non-covered table reads. + name: "secondary-index-covering-range", + category: "read", + sizeClass: "large", + description: "Large covering secondary-index range scan.", + }, + { + // Included to model secondary-index lookup plus record hydration when index order is not table-page order. + // Cache hit rate should be worse than the covering case, and read-ahead should avoid overcommitting on scattered table-page reads. + name: "secondary-index-scattered-table", + category: "read", + sizeClass: "large", + description: "Large secondary-index range that visits table rows in scattered rowid order.", + }, + { + // Included for actor-local reporting over operational tables. + // This should be scan-heavy: read-ahead should help, while cache capacity only helps if the table fits or pages are revisited. + name: "aggregate-status", + category: "read", + sizeClass: "large", + description: "Large GROUP BY status aggregate over an OLTP-style orders table.", + }, + { + // Included for dashboard-style time bucketing across many rows. + // Mostly sequential table/index access should benefit from read-ahead, but computed grouping should not depend on warm pager state. + name: "aggregate-time-bucket", + category: "read", + sizeClass: "large", + description: "Large time-bucket aggregate over an OLTP-style orders table.", + }, + { + // Included for selective OLTP aggregates scoped to one tenant and time range. + // The event index should narrow the scan, while joins back to orders expose table-page reuse and scattered lookup cost. + name: "aggregate-tenant-time-range", + category: "read", + sizeClass: "cache-fit", + description: "Selective tenant/time-range aggregate over events joined to orders.", + }, + { + // Included to measure future read-mode parallelism where several read-only SQLite connections overlap VFS misses. + // Today this captures the serialized baseline; after the connection manager lands, independent aggregate reads should overlap. + name: "parallel-read-aggregates", + category: "read", + sizeClass: "large", + description: "Concurrent read-only aggregates over one actor-local SQLite database.", + }, + { + // Included to measure the read-mode to write-mode transition. + // Future write mode must wait for active readers, close them, run exactly one writable connection, then allow fresh readers. + name: "parallel-read-write-transition", + category: "write", + sizeClass: "medium", + description: "Concurrent read aggregates with a queued write-mode update.", + }, + { + // Included for the first page of a timeline, inbox, or event feed after actor wake. + // Recent index/root pages should be good preload candidates, and LIMIT should keep fetched table pages bounded. + name: "feed-order-by-limit", + category: "read", + sizeClass: "medium", + description: "Recent-feed ORDER BY indexed timestamp with LIMIT.", + }, + { + // Included to test adjacent cursor pages, not just the first feed page. + // The second page should reuse nearby index pages and stay bounded by LIMIT rather than scanning the whole table. + name: "feed-pagination-adjacent", + category: "read", + sizeClass: "medium", + description: "Adjacent cursor pagination over an indexed recent-feed query.", + }, + { + // Included because joins can bounce between parent and child B-trees. + // Page cache should preserve hot parent/index pages while child table scans may still benefit from read-ahead. + name: "join-order-items", + category: "read", + sizeClass: "large", + description: "Orders to order-items join with grouped totals.", + }, + { + // Included as a non-scan workload to catch optimizations that only help sequential reads. + // Read-ahead should stay bounded; cache wins should come from repeated root/index page reuse. + name: "random-point-lookups", + category: "read", + sizeClass: "large", + description: "Deterministic random primary-key point lookups across a large table.", + }, + { + // Included for a hot index with cold table hydration. + // The tenant/rank index should be compact, but fetching bodies by row id should expose table-page misses. + name: "hot-index-cold-table", + category: "read", + sizeClass: "cache-overflow", + description: "Hot secondary-index selection followed by cold table-row hydration.", + }, + { + // Included to test composite primary-key storage without normal rowid table layout. + // Access follows primary-key B-tree order, but physical page order may diverge after splits, so read-ahead should grow only on directional VFS misses. + name: "ledger-without-rowid-range", + category: "read", + sizeClass: "large", + description: "WITHOUT ROWID composite-primary-key range read.", + }, + { + // Included to measure the write/commit path after opening a non-empty database. + // Schema and root pages should be warm from preload; dirty-page writes and commit transport should dominate rather than read-ahead. + name: "write-batch-after-wake", + category: "write", + sizeClass: "medium", + description: "Post-wake transactional insert batch into an existing database.", + }, + { + // Included to model repeated updates to a tenant/shard subset after wake. + // Protected cache should help root/index and hot partition pages survive scan churn while commit cost stays visible. + name: "update-hot-partition", + category: "write", + sizeClass: "medium", + description: "Post-wake indexed update of a hot partition.", + }, + { + // Included for storage churn without adding VACUUM as a dominant benchmark. + // Deletes create free-list/layout churn, then the range read shows whether scan behavior stays healthy. + name: "delete-churn-range-read", + category: "write", + sizeClass: "medium", + description: "Delete a hot shard range, then scan the remaining rowid table.", + }, + { + // Included because CREATE INDEX over existing data scans the source table and writes new index B-trees. + // Read-ahead may help source reads, but commit/write amplification should remain a major cost. + name: "migration-create-indexes-large", + category: "migration", + sizeClass: "large", + description: "Schema migration that creates multiple indexes on an existing large table.", + }, + { + // Included because skew changes index fanout/cardinality while still requiring a table scan. + // The source read path should resemble index creation, while index B-tree writes may differ from high-cardinality data. + name: "migration-create-indexes-skewed-large", + category: "migration", + sizeClass: "large", + description: "Schema migration that creates indexes over skewed existing data.", + }, + { + // Included for SQLite migrations that must rebuild a table, such as drop-column or type-change patterns. + // This should read and rewrite every row, so cache/preload helps less than storage read/write throughput. + name: "migration-table-rebuild-large", + category: "migration", + sizeClass: "large", + description: "Large table-rebuild migration using create-copy-drop-rename.", + }, + { + // Included as the large-data control for schema-only ADD COLUMN migrations. + // SQLite should update schema metadata without rewriting existing rows. + name: "migration-add-column-large", + category: "migration", + sizeClass: "large", + description: "Large-table ADD COLUMN migration that should avoid row rewrite.", + }, + { + // Included as a low-data migration canary. + // This should be dominated by schema/root page access and tiny commits, so startup preload should keep it fast. + name: "migration-ddl-small", + category: "canary", + sizeClass: "none", + description: "Small schema-only migration with CREATE TABLE, ALTER TABLE, and CREATE INDEX.", + }, +]; + +function usage(exitCode = 1): never { + console.error(`Usage: + pnpm --filter kitchen-sink exec tsx scripts/sqlite-realworld-bench.ts [options] + +Options: + --endpoint Rivet endpoint. Default: ${DEFAULT_ENDPOINT} + --key Actor key suffix. Defaults to a generated key. + --profile standard or smoke. Default: standard. + --only Comma-separated workload names. + --small-bytes Small workload payload bytes. + --medium-bytes Medium workload payload bytes. + --cache-fit-bytes Cache-fit workload payload bytes. + --cache-overflow-bytes Just-over-cache workload payload bytes. + --large-bytes Large workload payload bytes. + --row-bytes Payload bytes per seeded row. Default: ${DEFAULT_ROW_BYTES} + --wake-delay-ms Delay after c.sleep() before the measured main phase. Default: ${DEFAULT_WAKE_DELAY_MS} + --post-setup-wait-ms Optional wait after setup before sleep. Default: ${DEFAULT_POST_SETUP_WAIT_MS} + --output-dir Results directory. Default: ${DEFAULT_RESULTS_ROOT}/ + --metrics-token Bearer token for actor /metrics. Default: env or dev-metrics. + --disable-metadata-lookup Treat --endpoint as the direct engine endpoint. + --start-local-envoy Start this registry's local envoy before driving it. + --no-start-local-envoy Use an already-running endpoint. + --disable-storage-compaction Start the local engine with storage compaction disabled. + --disable-sqlite-optimizations + Disable all env-gated SQLite/VFS optimizations for baseline runs. + +Profiles: + standard: small=4 MiB, medium=64 MiB, cache-fit=128 MiB, cache-overflow=201 MiB, large=256 MiB. + smoke: small=256 KiB, medium=1 MiB, cache-fit=1 MiB, cache-overflow=2 MiB, large=2 MiB. + +Workloads: + ${WORKLOADS.join(", ")}`); + process.exit(exitCode); +} + +function readFlag(argv: string[], name: string): string | undefined { + const prefix = `${name}=`; + const inline = argv.find((arg) => arg.startsWith(prefix)); + if (inline) return inline.slice(prefix.length); + const index = argv.indexOf(name); + if (index >= 0) return argv[index + 1]; + return undefined; +} + +function readNumber( + argv: string[], + flag: string, + envName: string, + defaultValue: number, +): number { + const raw = readFlag(argv, flag) ?? process.env[envName]; + if (raw === undefined) return defaultValue; + const value = Number.parseInt(raw, 10); + if (!Number.isFinite(value) || value < 0) { + throw new Error(`${flag} must be a non-negative integer`); + } + return value; +} + +function parseProfile(value: string | undefined): Profile { + if (value === undefined || value === "standard") return "standard"; + if (value === "smoke") return "smoke"; + throw new Error("--profile must be standard or smoke"); +} + +function parseOnly(value: string | undefined): WorkloadName[] { + if (!value) return [...WORKLOADS]; + const names = value + .split(",") + .map((name) => name.trim()) + .filter(Boolean); + for (const name of names) { + if (!(WORKLOADS as readonly string[]).includes(name)) { + throw new Error(`unknown workload in --only: ${name}`); + } + } + return names as WorkloadName[]; +} + +function timestampForPath(date = new Date()): string { + return date.toISOString().replace(/[:.]/g, "-"); +} + +function parseArgs(argv: string[]): Args { + if (argv.includes("--help") || argv.includes("-h")) usage(0); + const endpoint = readFlag(argv, "--endpoint") ?? process.env.RIVET_ENDPOINT ?? DEFAULT_ENDPOINT; + const profile = parseProfile(readFlag(argv, "--profile")); + const defaultSmallBytes = profile === "smoke" ? 256 * 1024 : 4 * 1024 * 1024; + const defaultMediumBytes = profile === "smoke" ? 1024 * 1024 : 64 * 1024 * 1024; + const defaultCacheFitBytes = profile === "smoke" ? 1024 * 1024 : 128 * 1024 * 1024; + const defaultCacheOverflowBytes = + profile === "smoke" ? 2 * 1024 * 1024 : 201 * 1024 * 1024; + const defaultLargeBytes = profile === "smoke" ? 2 * 1024 * 1024 : 256 * 1024 * 1024; + const shouldStartLocalEnvoy = + argv.includes("--start-local-envoy") || + (!argv.includes("--no-start-local-envoy") && + endpoint === DEFAULT_ENDPOINT && + process.env.RIVET_ENDPOINT === undefined); + const outputDir = + readFlag(argv, "--output-dir") ?? + join(DEFAULT_RESULTS_ROOT, timestampForPath()); + + return { + endpoint, + key: + readFlag(argv, "--key") ?? + `sqlite-realworld-${Date.now()}-${crypto.randomUUID().slice(0, 8)}`, + profile, + only: parseOnly(readFlag(argv, "--only")), + smallBytes: readNumber( + argv, + "--small-bytes", + "SQLITE_REALWORLD_SMALL_BYTES", + defaultSmallBytes, + ), + mediumBytes: readNumber( + argv, + "--medium-bytes", + "SQLITE_REALWORLD_MEDIUM_BYTES", + defaultMediumBytes, + ), + cacheFitBytes: readNumber( + argv, + "--cache-fit-bytes", + "SQLITE_REALWORLD_CACHE_FIT_BYTES", + defaultCacheFitBytes, + ), + cacheOverflowBytes: readNumber( + argv, + "--cache-overflow-bytes", + "SQLITE_REALWORLD_CACHE_OVERFLOW_BYTES", + defaultCacheOverflowBytes, + ), + largeBytes: readNumber( + argv, + "--large-bytes", + "SQLITE_REALWORLD_LARGE_BYTES", + defaultLargeBytes, + ), + rowBytes: readNumber( + argv, + "--row-bytes", + "SQLITE_REALWORLD_ROW_BYTES", + DEFAULT_ROW_BYTES, + ), + wakeDelayMs: readNumber( + argv, + "--wake-delay-ms", + "SQLITE_REALWORLD_WAKE_DELAY_MS", + DEFAULT_WAKE_DELAY_MS, + ), + postSetupWaitMs: readNumber( + argv, + "--post-setup-wait-ms", + "SQLITE_REALWORLD_POST_SETUP_WAIT_MS", + DEFAULT_POST_SETUP_WAIT_MS, + ), + outputDir, + metricsToken: + readFlag(argv, "--metrics-token") ?? + process.env.SQLITE_REALWORLD_METRICS_TOKEN ?? + process.env._RIVET_METRICS_TOKEN ?? + "dev-metrics", + disableMetadataLookup: argv.includes("--disable-metadata-lookup"), + startLocalEnvoy: shouldStartLocalEnvoy, + disableStorageCompaction: argv.includes("--disable-storage-compaction"), + disableSqliteOptimizations: argv.includes("--disable-sqlite-optimizations"), + }; +} + +function disabledSqliteOptimizationEnv(): Record { + const env: Record = {}; + for (const name of SQLITE_OPT_MODE_ENVS) { + env[name] = "off"; + } + for (const name of SQLITE_OPT_BOOLEAN_ENVS) { + env[name] = "false"; + } + for (const name of SQLITE_OPT_NUMERIC_ENVS) { + env[name] = "0"; + } + return env; +} + +function applyDisabledSqliteOptimizations(target: NodeJS.ProcessEnv): void { + Object.assign(target, disabledSqliteOptimizationEnv()); +} + +function sqliteOptimizationEnvSnapshot(): Record { + const snapshot: Record = {}; + for (const name of [...SQLITE_OPT_MODE_ENVS, ...SQLITE_OPT_BOOLEAN_ENVS, ...SQLITE_OPT_NUMERIC_ENVS]) { + snapshot[name] = process.env[name] ?? null; + } + return snapshot; +} + +function envNumberOrDefault(name: string, defaultValue: number): number { + const raw = process.env[name]; + if (raw === undefined) return defaultValue; + const value = Number.parseInt(raw, 10); + return Number.isFinite(value) ? value : defaultValue; +} + +function sleep(ms: number): Promise { + return new Promise((resolve) => setTimeout(resolve, ms)); +} + +function fmtMs(ms: number): string { + return `${ms.toFixed(1)}ms`; +} + +function fmtBytes(bytes: number): string { + const mib = bytes / 1024 / 1024; + return `${mib.toFixed(2)} MiB`; +} + +function targetBytesFor(args: Args, sizeClass: SizeClass): number { + switch (sizeClass) { + case "none": + return 0; + case "small": + return args.smallBytes; + case "medium": + return args.mediumBytes; + case "cache-fit": + return args.cacheFitBytes; + case "cache-overflow": + return args.cacheOverflowBytes; + case "large": + return args.largeBytes; + } +} + +function resolveEngineBinary(): string { + if (process.env.RIVET_ENGINE_BINARY) return process.env.RIVET_ENGINE_BINARY; + if (existsSync(REPO_ENGINE_BINARY)) return REPO_ENGINE_BINARY; + throw new Error( + `No local rivet-engine binary found. Build one with cargo build -p rivet-engine or set RIVET_ENGINE_BINARY.`, + ); +} + +function tailEngineLogs(engine: LocalEngine | undefined): string { + if (!engine) return ""; + const text = engine.logs.join(""); + const lines = text.trimEnd().split("\n"); + return lines.slice(-120).join("\n"); +} + +async function waitForEngineReady( + child: ChildProcess, + endpoint: string, + logs: string[], +): Promise { + const deadline = Date.now() + 15_000; + let lastError: unknown; + + while (Date.now() < deadline) { + if (child.exitCode !== null) { + throw new Error( + `rivet-engine exited before health check passed:\n${logs.join("")}`, + ); + } + + try { + const response = await fetch(`${endpoint.replace(/\/$/, "")}/health`); + if (response.ok) return; + lastError = new Error(`health returned ${response.status}`); + } catch (err) { + lastError = err; + } + + await sleep(100); + } + + throw lastError instanceof Error + ? lastError + : new Error("timed out waiting for rivet-engine"); +} + +async function startLocalEngine(args: Args): Promise { + const logs: string[] = []; + const dbRoot = mkdtempSync(join(tmpdir(), "sqlite-realworld-engine-")); + const metricsPort = await findOpenPort(); + const engineEndpoint = new URL(args.endpoint); + const guardPort = Number.parseInt(engineEndpoint.port, 10); + if (!Number.isFinite(guardPort) || guardPort <= 0) { + throw new Error(`endpoint must include a numeric port: ${args.endpoint}`); + } + const guardHost = engineEndpoint.hostname || "127.0.0.1"; + const env = { + ...process.env, + RIVET__GUARD__HOST: guardHost, + RIVET__GUARD__PORT: guardPort.toString(), + RIVET__API_PEER__HOST: guardHost, + RIVET__API_PEER__PORT: (guardPort + 1).toString(), + RIVET__FILE_SYSTEM__PATH: join(dbRoot, "db"), + RIVET__METRICS__HOST: "127.0.0.1", + RIVET__METRICS__PORT: metricsPort.toString(), + _RIVET_METRICS_TOKEN: args.metricsToken, + }; + if (args.disableStorageCompaction) { + env.RIVET_SQLITE_DISABLE_COMPACTION = + process.env.RIVET_SQLITE_DISABLE_COMPACTION ?? "1"; + } + const child = spawn(resolveEngineBinary(), ["start"], { + env, + stdio: ["ignore", "pipe", "pipe"], + }); + child.stdout?.on("data", (chunk) => logs.push(chunk.toString())); + child.stderr?.on("data", (chunk) => logs.push(chunk.toString())); + try { + await waitForEngineReady(child, args.endpoint, logs); + return { child, dbRoot, logs }; + } catch (err) { + await stopLocalEngine({ child, dbRoot, logs }); + throw err; + } +} + +async function findOpenPort(): Promise { + return new Promise((resolvePort, reject) => { + const server = createServer(); + server.on("error", reject); + server.listen(0, "127.0.0.1", () => { + const address = server.address(); + if (address === null || typeof address === "string") { + server.close(() => reject(new Error("failed to allocate metrics port"))); + return; + } + const port = address.port; + server.close(() => resolvePort(port)); + }); + }); +} + +async function stopLocalEngine(engine: LocalEngine | undefined): Promise { + if (!engine) return; + const { child, dbRoot } = engine; + if (child.exitCode === null) { + child.kill("SIGTERM"); + await Promise.race([ + new Promise((resolve) => child.once("exit", () => resolve())), + sleep(5_000), + ]); + if (child.exitCode === null) child.kill("SIGKILL"); + } + rmSync(dbRoot, { recursive: true, force: true }); +} + +async function waitForRegistryReady(endpoint: string): Promise { + const deadline = Date.now() + 15_000; + let lastError: unknown; + + while (Date.now() < deadline) { + try { + const response = await fetch(`${endpoint.replace(/\/$/, "")}/metadata`); + if (response.ok) return; + lastError = new Error(`metadata returned ${response.status}`); + } catch (err) { + lastError = err; + } + + await sleep(100); + } + + throw lastError instanceof Error + ? lastError + : new Error("timed out waiting for local registry"); +} + +async function configureLocalRunner(endpoint: string): Promise { + const base = endpoint.replace(/\/$/, ""); + const datacentersResponse = await fetch(`${base}/datacenters?namespace=default`, { + headers: { Authorization: "Bearer dev" }, + }); + if (!datacentersResponse.ok) { + throw new Error( + `failed to list local datacenters: ${datacentersResponse.status} ${await datacentersResponse.text()}`, + ); + } + + const datacentersBody = (await datacentersResponse.json()) as { + datacenters: Array<{ name: string }>; + }; + const datacenter = datacentersBody.datacenters[0]?.name; + if (!datacenter) throw new Error("local engine returned no datacenters"); + + const response = await fetch(`${base}/runner-configs/default?namespace=default`, { + method: "PUT", + headers: { + Authorization: "Bearer dev", + "Content-Type": "application/json", + }, + body: JSON.stringify({ + datacenters: { + [datacenter]: { + normal: {}, + }, + }, + }), + }); + if (!response.ok) { + throw new Error( + `failed to configure local default runner: ${response.status} ${await response.text()}`, + ); + } +} + +async function waitForEnvoy(endpoint: string): Promise { + const base = endpoint.replace(/\/$/, ""); + const deadline = Date.now() + 15_000; + + while (Date.now() < deadline) { + const response = await fetch(`${base}/envoys?namespace=default&name=default`, { + headers: { Authorization: "Bearer dev" }, + }); + if (response.ok) { + const body = (await response.json()) as { + envoys: Array<{ envoy_key: string }>; + }; + if (body.envoys.length > 0) return; + } + + await sleep(100); + } + + throw new Error("timed out waiting for local envoy registration"); +} + +async function retryTransient( + label: string, + fn: () => Promise, + attempts = 3, +): Promise { + let lastError: unknown; + for (let attempt = 1; attempt <= attempts; attempt += 1) { + try { + return await fn(); + } catch (err) { + lastError = err; + const message = err instanceof Error ? err.message : String(err); + const transient = + message.includes("timed out") || + message.includes("fetch failed") || + message.includes("Connection reset") || + message.includes("Service unavailable"); + if (!transient || attempt === attempts) break; + console.warn(` ${label} failed transiently, retrying ${attempt + 1}/${attempts}`); + await sleep(1000 * attempt); + } + } + throw lastError; +} + +function parsePrometheusLabels(raw: string | undefined): Record { + if (!raw) return {}; + const labels: Record = {}; + for (const part of raw.slice(1, -1).split(",")) { + const separator = part.indexOf("="); + if (separator < 0) continue; + const key = part.slice(0, separator); + const value = part.slice(separator + 1).replace(/^"|"$/g, ""); + labels[key] = value; + } + return labels; +} + +function metricValue(text: string, name: string): number { + let total = 0; + let found = false; + for (const line of text.split("\n")) { + if (line.length === 0 || line.startsWith("#")) continue; + const [series, value] = line.trim().split(/\s+/, 2); + if (!series || value === undefined) continue; + const match = /^([^{]+)(\{.*\})?$/.exec(series); + if (!match || match[1] !== name) continue; + parsePrometheusLabels(match[2]); + total += Number.parseFloat(value); + found = true; + } + return found ? total : 0; +} + +async function scrapeActorMetricsText( + endpoint: string, + actorId: string, + metricsToken: string, +): Promise { + const base = endpoint.replace(/\/$/, ""); + const gatewayToken = process.env.RIVET_TOKEN + ? `@${encodeURIComponent(process.env.RIVET_TOKEN)}` + : ""; + const response = await fetch( + `${base}/gateway/${encodeURIComponent(actorId)}${gatewayToken}/metrics`, + { + headers: { + Authorization: `Bearer ${metricsToken}`, + }, + }, + ); + if (!response.ok) { + throw new Error( + `failed to scrape actor metrics: ${response.status} ${await response.text()}`, + ); + } + return await response.text(); +} + +function scrapeVfsMetrics(text: string): VfsMetricSnapshot { + return { + resolvePagesTotal: metricValue(text, "sqlite_vfs_resolve_pages_total"), + resolvePagesRequestedTotal: metricValue( + text, + "sqlite_vfs_resolve_pages_requested_total", + ), + resolvePagesCacheHitsTotal: metricValue( + text, + "sqlite_vfs_resolve_pages_cache_hits_total", + ), + resolvePagesCacheMissesTotal: metricValue( + text, + "sqlite_vfs_resolve_pages_cache_misses_total", + ), + getPagesTotal: metricValue(text, "sqlite_vfs_get_pages_total"), + pagesFetchedTotal: metricValue(text, "sqlite_vfs_pages_fetched_total"), + prefetchPagesTotal: metricValue(text, "sqlite_vfs_prefetch_pages_total"), + bytesFetchedTotal: metricValue(text, "sqlite_vfs_bytes_fetched_total"), + prefetchBytesTotal: metricValue(text, "sqlite_vfs_prefetch_bytes_total"), + getPagesDurationSecondsSum: metricValue( + text, + "sqlite_vfs_get_pages_duration_seconds_sum", + ), + getPagesDurationSecondsCount: metricValue( + text, + "sqlite_vfs_get_pages_duration_seconds_count", + ), + }; +} + +function scrapeReadPoolMetrics(text: string): ReadPoolMetricSnapshot { + return { + activeReaders: metricValue(text, "sqlite_read_pool_active_readers"), + idleReaders: metricValue(text, "sqlite_read_pool_idle_readers"), + readWaitDurationSecondsSum: metricValue( + text, + "sqlite_read_pool_read_wait_duration_seconds_sum", + ), + readWaitDurationSecondsCount: metricValue( + text, + "sqlite_read_pool_read_wait_duration_seconds_count", + ), + writeWaitDurationSecondsSum: metricValue( + text, + "sqlite_read_pool_write_wait_duration_seconds_sum", + ), + writeWaitDurationSecondsCount: metricValue( + text, + "sqlite_read_pool_write_wait_duration_seconds_count", + ), + routedReadQueriesTotal: metricValue( + text, + "sqlite_read_pool_routed_read_queries_total", + ), + writeFallbackQueriesTotal: metricValue( + text, + "sqlite_read_pool_write_fallback_queries_total", + ), + manualTransactionDurationSecondsSum: metricValue( + text, + "sqlite_read_pool_manual_transaction_duration_seconds_sum", + ), + manualTransactionDurationSecondsCount: metricValue( + text, + "sqlite_read_pool_manual_transaction_duration_seconds_count", + ), + readerOpensTotal: metricValue(text, "sqlite_read_pool_reader_opens_total"), + readerClosesTotal: metricValue(text, "sqlite_read_pool_reader_closes_total"), + rejectedReaderMutationsTotal: metricValue( + text, + "sqlite_read_pool_rejected_reader_mutations_total", + ), + modeTransitionsTotal: metricValue( + text, + "sqlite_read_pool_mode_transitions_total", + ), + }; +} + +function diffMetrics(after: T, before: T): T { + return Object.fromEntries( + Object.keys(after).map((key) => [ + key, + (after[key as keyof T] as number) - (before[key as keyof T] as number), + ]), + ) as T; +} + +function emptyVfsMetrics(): VfsMetricSnapshot { + return { + resolvePagesTotal: 0, + resolvePagesRequestedTotal: 0, + resolvePagesCacheHitsTotal: 0, + resolvePagesCacheMissesTotal: 0, + getPagesTotal: 0, + pagesFetchedTotal: 0, + prefetchPagesTotal: 0, + bytesFetchedTotal: 0, + prefetchBytesTotal: 0, + getPagesDurationSecondsSum: 0, + getPagesDurationSecondsCount: 0, + }; +} + +function emptyReadPoolMetrics(): ReadPoolMetricSnapshot { + return { + activeReaders: 0, + idleReaders: 0, + readWaitDurationSecondsSum: 0, + readWaitDurationSecondsCount: 0, + writeWaitDurationSecondsSum: 0, + writeWaitDurationSecondsCount: 0, + routedReadQueriesTotal: 0, + writeFallbackQueriesTotal: 0, + manualTransactionDurationSecondsSum: 0, + manualTransactionDurationSecondsCount: 0, + readerOpensTotal: 0, + readerClosesTotal: 0, + rejectedReaderMutationsTotal: 0, + modeTransitionsTotal: 0, + }; +} + +function writeResults(outputDir: string, document: unknown): void { + mkdirSync(outputDir, { recursive: true }); + writeFileSync( + join(outputDir, "results.json"), + `${JSON.stringify(document, null, "\t")}\n`, + ); +} + +function writeSummary(outputDir: string, results: BenchmarkResult[]): void { + const lines = [ + "SQLite real-world benchmark", + "", + "Server SQLite time only. Setup time, sleep delay, wake/cold-start time, and client RTT are not included.", + "", + "| workload | category | size | server_ms | routed_reads | write_fallbacks | mode_transitions | reader_opens | reader_closes | get_pages | fetched_pages | cache_hits | cache_misses | rows/ops | pages |", + "| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |", + ]; + for (const result of results) { + const rowsOrOps = + typeof result.main.rows === "number" + ? result.main.rows + : typeof result.main.ops === "number" + ? result.main.ops + : ""; + lines.push( + `| ${result.workload} | ${result.category} | ${fmtBytes(result.targetBytes)} | ${result.main.ms.toFixed(1)} | ${result.readPoolMetrics.routedReadQueriesTotal} | ${result.readPoolMetrics.writeFallbackQueriesTotal} | ${result.readPoolMetrics.modeTransitionsTotal} | ${result.readPoolMetrics.readerOpensTotal} | ${result.readPoolMetrics.readerClosesTotal} | ${result.vfsMetrics.getPagesTotal} | ${result.vfsMetrics.pagesFetchedTotal} | ${result.vfsMetrics.resolvePagesCacheHitsTotal} | ${result.vfsMetrics.resolvePagesCacheMissesTotal} | ${rowsOrOps} | ${result.main.pageCount} |`, + ); + } + writeFileSync(join(outputDir, "summary.md"), `${lines.join("\n")}\n`); +} + +async function main(): Promise { + const args = parseArgs(process.argv.slice(2)); + if (args.disableSqliteOptimizations) { + applyDisabledSqliteOptimizations(process.env); + } + process.env._RIVET_METRICS_TOKEN = args.metricsToken; + const selectedSpecs = WORKLOAD_SPECS.filter((spec) => + args.only.includes(spec.name), + ); + let engine: LocalEngine | undefined; + + if (args.startLocalEnvoy) { + process.env.RIVET_ENDPOINT = args.endpoint; + process.env.RIVET_TOKEN = process.env.RIVET_TOKEN ?? "dev"; + try { + engine = await startLocalEngine(args); + await configureLocalRunner(args.endpoint); + await import("@rivetkit/sql-loader"); + const { registry } = await import("../src/index.ts"); + registry.start(); + await waitForRegistryReady(args.endpoint); + await waitForEnvoy(args.endpoint); + await sleep(500); + } catch (err) { + await stopLocalEngine(engine); + throw err; + } + } + + const outputDir = resolve(REPO_ROOT, args.outputDir); + const client = createClient({ + endpoint: args.endpoint, + disableMetadataLookup: args.disableMetadataLookup, + }); + type BenchHandle = ReturnType; + const results: BenchmarkResult[] = []; + const startedAt = new Date().toISOString(); + + const startupPreloadMaxBytes = envNumberOrDefault( + "RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_MAX_BYTES", + DEFAULT_STARTUP_PRELOAD_MAX_BYTES, + ); + const vfsPageCacheCapacityPages = envNumberOrDefault( + "RIVETKIT_SQLITE_OPT_VFS_PAGE_CACHE_CAPACITY_PAGES", + DEFAULT_VFS_PAGE_CACHE_CAPACITY_PAGES, + ); + const vfsPageCacheBytes = vfsPageCacheCapacityPages * SQLITE_PAGE_SIZE_BYTES; + const resultDocument = { + schemaVersion: 1, + startedAt, + finishedAt: null as string | null, + config: { + endpoint: args.endpoint, + profile: args.profile, + selectedWorkloads: selectedSpecs.map((spec) => spec.name), + sizes: { + smallBytes: args.smallBytes, + mediumBytes: args.mediumBytes, + cacheFitBytes: args.cacheFitBytes, + cacheOverflowBytes: args.cacheOverflowBytes, + largeBytes: args.largeBytes, + rowBytes: args.rowBytes, + }, + metricsToken: args.metricsToken, + wakeDelayMs: args.wakeDelayMs, + postSetupWaitMs: args.postSetupWaitMs, + startLocalEnvoy: args.startLocalEnvoy, + disableStorageCompaction: args.disableStorageCompaction, + sqliteOptimizationsDisabled: args.disableSqliteOptimizations, + sqliteOptimizationEnv: sqliteOptimizationEnvSnapshot(), + cacheSizing: { + sqlitePageSizeBytes: SQLITE_PAGE_SIZE_BYTES, + startupPreloadMaxBytes, + vfsPageCacheCapacityPages, + vfsPageCacheCapacityBytes: vfsPageCacheBytes, + largeBytesExceedsConfiguredVfsCache: args.largeBytes > vfsPageCacheBytes, + }, + }, + cacheConfigProbe: null as CacheConfigResult | null, + results, + }; + + console.log("SQLite real-world benchmark"); + console.log(`endpoint=${args.endpoint}`); + console.log(`profile=${args.profile}`); + console.log(`output=${outputDir}`); + console.log( + `sqlite_optimizations=${args.disableSqliteOptimizations ? "disabled" : "default"}`, + ); + console.log( + `cache_fit=${fmtBytes(args.cacheFitBytes)} cache_overflow=${fmtBytes(args.cacheOverflowBytes)} large=${fmtBytes(args.largeBytes)} vfs_cache_configured=${fmtBytes(vfsPageCacheBytes)} startup_preload_configured=${fmtBytes(startupPreloadMaxBytes)}`, + ); + console.log("server SQLite time only; setup, sleep, wake, and RTT are excluded"); + + try { + mkdirSync(outputDir, { recursive: true }); + + const probeKey = ["sqlite-realworld-bench", args.key, "cache-config"]; + const probeHandle = client.sqliteRealworldBench.getOrCreate(probeKey); + resultDocument.cacheConfigProbe = (await retryTransient( + "cache config probe", + () => probeHandle.inspectCacheConfig(), + )) as CacheConfigResult; + await probeHandle.goToSleep(); + writeResults(outputDir, resultDocument); + + for (const spec of selectedSpecs) { + const targetBytes = targetBytesFor(args, spec.sizeClass); + const actorKey = ["sqlite-realworld-bench", args.key, spec.name]; + const handle: BenchHandle = + client.sqliteRealworldBench.getOrCreate(actorKey); + + console.log(`\n${spec.name}`); + console.log(` ${spec.description}`); + console.log(` actor_key=${actorKey.join("/")}`); + console.log(` target=${fmtBytes(targetBytes)}`); + const actorId = await retryTransient("actor resolve", () => handle.resolve()); + console.log(` actor_id=${actorId}`); + + let setup: SetupResult | null = null; + if (spec.sizeClass !== "none") { + console.log(" setup..."); + setup = (await handle.setupWorkload({ + workload: spec.name, + targetBytes, + rowBytes: args.rowBytes, + })) as SetupResult; + console.log( + ` setup rows=${setup.rows} pages=${setup.pageCount} setup_ms=${fmtMs(setup.setupMs)}`, + ); + } else { + console.log(" setup skipped"); + setup = (await handle.setupWorkload({ + workload: spec.name, + targetBytes: 0, + rowBytes: args.rowBytes, + })) as SetupResult; + } + + if (args.postSetupWaitMs > 0) await sleep(args.postSetupWaitMs); + + console.log(" sleep..."); + await handle.goToSleep(); + await sleep(args.wakeDelayMs); + + console.log(" cold-wake main phase..."); + const coldHandle = client.sqliteRealworldBench.getOrCreate(actorKey); + const mainResult = (await retryTransient("main workload", () => + coldHandle.runWorkload({ + workload: spec.name, + targetBytes, + }), + )) as MainResult; + const afterMainMetricsText = await scrapeActorMetricsText( + args.endpoint, + actorId, + args.metricsToken, + ); + const vfsMetrics = diffMetrics( + scrapeVfsMetrics(afterMainMetricsText), + emptyVfsMetrics(), + ); + const readPoolMetrics = diffMetrics( + scrapeReadPoolMetrics(afterMainMetricsText), + emptyReadPoolMetrics(), + ); + console.log( + ` server=${fmtMs(mainResult.ms)} pages=${mainResult.pageCount} routed_reads=${readPoolMetrics.routedReadQueriesTotal} write_fallbacks=${readPoolMetrics.writeFallbackQueriesTotal} mode_transitions=${readPoolMetrics.modeTransitionsTotal} get_pages=${vfsMetrics.getPagesTotal} fetched_pages=${vfsMetrics.pagesFetchedTotal}`, + ); + + results.push({ + workload: spec.name, + description: spec.description, + category: spec.category, + sizeClass: spec.sizeClass, + targetBytes, + actorKey, + actorId, + setup, + main: mainResult, + vfsMetrics, + readPoolMetrics, + }); + writeResults(outputDir, resultDocument); + writeSummary(outputDir, results); + } + + resultDocument.finishedAt = new Date().toISOString(); + writeResults(outputDir, resultDocument); + writeSummary(outputDir, results); + + console.log("\nResults"); + for (const result of results) { + console.log( + ` ${result.workload}: server=${fmtMs(result.main.ms)} size=${fmtBytes(result.targetBytes)} routed_reads=${result.readPoolMetrics.routedReadQueriesTotal} write_fallbacks=${result.readPoolMetrics.writeFallbackQueriesTotal} mode_transitions=${result.readPoolMetrics.modeTransitionsTotal} get_pages=${result.vfsMetrics.getPagesTotal} fetched_pages=${result.vfsMetrics.pagesFetchedTotal}`, + ); + } + console.log(`\nwrote ${join(outputDir, "results.json")}`); + console.log(`wrote ${join(outputDir, "summary.md")}`); + } catch (err) { + const engineLogs = tailEngineLogs(engine); + if (engineLogs) { + console.error("\nengine log tail:"); + console.error(engineLogs); + } + throw err; + } finally { + await client.dispose().catch(() => undefined); + await stopLocalEngine(engine); + } +} + +main() + .then(() => { + process.exit(0); + }) + .catch((err: unknown) => { + const message = err instanceof Error ? err.stack ?? err.message : String(err); + console.error(message); + process.exit(1); + }); diff --git a/examples/kitchen-sink/src/actors/testing/sqlite-realworld-bench.ts b/examples/kitchen-sink/src/actors/testing/sqlite-realworld-bench.ts new file mode 100644 index 0000000000..0f896a732b --- /dev/null +++ b/examples/kitchen-sink/src/actors/testing/sqlite-realworld-bench.ts @@ -0,0 +1,1108 @@ +import { actor } from "rivetkit"; +import { db } from "rivetkit/db"; + +const DEFAULT_ROW_BYTES = 2 * 1024; +const ORDER_BATCH_ROWS = 50; +const DOC_BATCH_ROWS = 75; +const LEDGER_BATCH_ROWS = 100; +const POINT_LOOKUP_OPS = 1_000; +const RANGE_CHUNK_ROWS = 512; +const SETUP_TRANSACTION_ROWS = 128; +const FEED_PAGE_ROWS = 100; + +// Keep this list in sync with the runner's workload catalog. The runner owns +// the per-workload rationale and expected cache/VFS behavior so benchmark +// result artifacts can preserve that intent over time. +const WORKLOADS = [ + "small-rowid-point", + "small-schema-read", + "small-range-scan", + "rowid-range-forward", + "rowid-range-backward", + "secondary-index-covering-range", + "secondary-index-scattered-table", + "aggregate-status", + "aggregate-time-bucket", + "aggregate-tenant-time-range", + "parallel-read-aggregates", + "parallel-read-write-transition", + "feed-order-by-limit", + "feed-pagination-adjacent", + "join-order-items", + "random-point-lookups", + "hot-index-cold-table", + "ledger-without-rowid-range", + "write-batch-after-wake", + "update-hot-partition", + "delete-churn-range-read", + "migration-create-indexes-large", + "migration-create-indexes-skewed-large", + "migration-table-rebuild-large", + "migration-add-column-large", + "migration-ddl-small", +] as const; + +type WorkloadName = (typeof WORKLOADS)[number]; + +interface SetupInput { + workload: WorkloadName; + targetBytes?: number; + rowBytes?: number; +} + +interface RunInput { + workload: WorkloadName; + targetBytes?: number; +} + +interface CountRow { + rows: number; +} + +interface PageCountRow { + page_count: number; +} + +interface CacheSizeRow { + cache_size: number; +} + +interface PageSizeRow { + page_size: number; +} + +interface BytesRow { + bytes: number; + rows?: number; +} + +interface AggregateRow { + rows: number; + total: number; +} + +function positiveInteger(value: number | undefined, fallback: number, name: string) { + const resolved = value ?? fallback; + if (!Number.isInteger(resolved) || resolved < 1) { + throw new Error(`${name} must be a positive integer`); + } + return resolved; +} + +function assertWorkload(workload: string): asserts workload is WorkloadName { + if (!(WORKLOADS as readonly string[]).includes(workload)) { + throw new Error(`unknown SQLite benchmark workload: ${workload}`); + } +} + +function pseudoRandom(value: number) { + return Math.imul(value ^ 0x9e3779b9, 0x85ebca6b) >>> 0; +} + +function paddedHex(value: number) { + return pseudoRandom(value).toString(16).padStart(8, "0"); +} + +function payload(prefix: string, bytes: number) { + return prefix + "x".repeat(Math.max(0, bytes - prefix.length)); +} + +function typedRows(rows: unknown[]): T[] { + return rows as T[]; +} + +async function queryPageCount(database: { + execute: (sql: string, ...args: unknown[]) => Promise; +}) { + const [row] = typedRows(await database.execute("PRAGMA page_count")); + return row?.page_count ?? 0; +} + +async function resetCommerce(database: { + execute: (sql: string, ...args: unknown[]) => Promise; +}) { + await database.execute("DELETE FROM rw_order_items"); + await database.execute("DELETE FROM rw_orders"); + await database.execute("DELETE FROM rw_customers"); + await database.execute("DELETE FROM rw_events"); +} + +async function resetDocs(database: { + execute: (sql: string, ...args: unknown[]) => Promise; +}) { + await database.execute("DELETE FROM rw_docs"); +} + +async function resetLedger(database: { + execute: (sql: string, ...args: unknown[]) => Promise; +}) { + await database.execute("DELETE FROM rw_ledger"); +} + +async function resetMigration(database: { + execute: (sql: string, ...args: unknown[]) => Promise; +}) { + await database.execute("DROP INDEX IF EXISTS idx_rw_migration_source_account"); + await database.execute("DROP INDEX IF EXISTS idx_rw_migration_source_created"); + await database.execute("DROP INDEX IF EXISTS idx_rw_migration_source_status_total"); + await database.execute("DROP INDEX IF EXISTS idx_rw_migration_source_skew_account"); + await database.execute("DROP INDEX IF EXISTS idx_rw_migration_source_skew_status"); + await database.execute("DROP TABLE IF EXISTS rw_migration_source_rebuilt"); + await database.execute("DROP TABLE IF EXISTS rw_migration_source"); + await database.execute("DROP TABLE IF EXISTS rw_migration_audit"); + await database.execute("DROP TABLE IF EXISTS rw_migration_empty"); +} + +async function withTransaction( + database: { + execute: (sql: string, ...args: unknown[]) => Promise; + }, + fn: () => Promise, +) { + let inTransaction = false; + await database.execute("BEGIN"); + inTransaction = true; + try { + await fn(); + await database.execute("COMMIT"); + inTransaction = false; + } catch (err) { + if (inTransaction) { + await database.execute("ROLLBACK").catch(() => undefined); + } + throw err; + } +} + +async function seedCommerce( + database: { + execute: (sql: string, ...args: unknown[]) => Promise; + }, + targetBytes: number, + rowBytes: number, +) { + await resetCommerce(database); + const rows = Math.max(1, Math.ceil(targetBytes / rowBytes)); + const customerCount = Math.max(32, Math.ceil(rows / 16)); + const startedAt = performance.now(); + + await withTransaction(database, async () => { + for (let offset = 0; offset < customerCount; offset += ORDER_BATCH_ROWS) { + const placeholders: string[] = []; + const args: unknown[] = []; + const batchEnd = Math.min(customerCount, offset + ORDER_BATCH_ROWS); + for (let i = offset; i < batchEnd; i += 1) { + placeholders.push("(?, ?, ?, ?, ?)"); + args.push( + i + 1, + `acct-${i % 64}`, + `user-${paddedHex(i)}@example.test`, + ["free", "pro", "team", "enterprise"][i % 4], + ["iad", "sfo", "fra", "sin"][i % 4], + ); + } + await database.execute( + `INSERT INTO rw_customers (id, account_id, email, plan, region) VALUES ${placeholders.join(", ")}`, + ...args, + ); + } + }); + + for (let txStart = 0; txStart < rows; txStart += SETUP_TRANSACTION_ROWS) { + const txEnd = Math.min(rows, txStart + SETUP_TRANSACTION_ROWS); + await withTransaction(database, async () => { + for (let offset = txStart; offset < txEnd; offset += ORDER_BATCH_ROWS) { + const orderPlaceholders: string[] = []; + const orderArgs: unknown[] = []; + const itemPlaceholders: string[] = []; + const itemArgs: unknown[] = []; + const eventPlaceholders: string[] = []; + const eventArgs: unknown[] = []; + const batchEnd = Math.min(txEnd, offset + ORDER_BATCH_ROWS); + + for (let i = offset; i < batchEnd; i += 1) { + const id = i + 1; + const customerId = (pseudoRandom(i) % customerCount) + 1; + const createdAt = 1_700_000_000_000 + i * 1000; + const status = ["pending", "paid", "shipped", "refunded"][i % 4]; + const totalCents = 500 + (pseudoRandom(i + 17) % 25_000); + const note = payload(`order-${id}-${status}:`, rowBytes); + + orderPlaceholders.push("(?, ?, ?, ?, ?, ?, ?)"); + orderArgs.push( + id, + customerId, + createdAt, + status, + totalCents, + i % 128, + note, + ); + + for (let item = 0; item < 2; item += 1) { + itemPlaceholders.push("(?, ?, ?, ?, ?)"); + itemArgs.push( + id, + `sku-${paddedHex(i + item).slice(0, 6)}`, + 1 + ((i + item) % 5), + 100 + (pseudoRandom(i + item + 31) % 5000), + item, + ); + } + + eventPlaceholders.push("(?, ?, ?, ?, ?)"); + eventArgs.push( + `acct-${customerId % 64}`, + ["click", "purchase", "refund", "shipment"][i % 4], + createdAt, + `order:${id}`, + payload(`event-${id}:`, Math.min(rowBytes, 512)), + ); + } + + await database.execute( + `INSERT INTO rw_orders (id, customer_id, created_at, status, total_cents, shard, note) VALUES ${orderPlaceholders.join(", ")}`, + ...orderArgs, + ); + await database.execute( + `INSERT INTO rw_order_items (order_id, sku, quantity, price_cents, line_no) VALUES ${itemPlaceholders.join(", ")}`, + ...itemArgs, + ); + await database.execute( + `INSERT INTO rw_events (account_id, event_type, created_at, entity_key, properties) VALUES ${eventPlaceholders.join(", ")}`, + ...eventArgs, + ); + } + }); + } + + return { + rows, + targetBytes, + rowBytes, + setupMs: performance.now() - startedAt, + pageCount: await queryPageCount(database), + }; +} + +async function seedDocs( + database: { + execute: (sql: string, ...args: unknown[]) => Promise; + }, + targetBytes: number, + rowBytes: number, +) { + await resetDocs(database); + const rows = Math.max(1, Math.ceil(targetBytes / rowBytes)); + const startedAt = performance.now(); + + for (let txStart = 0; txStart < rows; txStart += SETUP_TRANSACTION_ROWS) { + const txEnd = Math.min(rows, txStart + SETUP_TRANSACTION_ROWS); + await withTransaction(database, async () => { + for (let offset = txStart; offset < txEnd; offset += DOC_BATCH_ROWS) { + const placeholders: string[] = []; + const args: unknown[] = []; + const batchEnd = Math.min(txEnd, offset + DOC_BATCH_ROWS); + for (let i = offset; i < batchEnd; i += 1) { + const rank = pseudoRandom(i); + const body = payload(`doc-${i}-${rank}:`, rowBytes); + placeholders.push("(?, ?, ?, ?, ?)"); + args.push( + `doc-${paddedHex(i)}`, + rank, + `tenant-${rank % 128}`, + body, + rowBytes, + ); + } + await database.execute( + `INSERT INTO rw_docs (external_key, row_rank, tenant_id, body, body_bytes) VALUES ${placeholders.join(", ")}`, + ...args, + ); + } + }); + } + + return { + rows, + targetBytes, + rowBytes, + setupMs: performance.now() - startedAt, + pageCount: await queryPageCount(database), + }; +} + +async function seedLedger( + database: { + execute: (sql: string, ...args: unknown[]) => Promise; + }, + targetBytes: number, + rowBytes: number, +) { + await resetLedger(database); + const rows = Math.max(1, Math.ceil(targetBytes / rowBytes)); + const startedAt = performance.now(); + + for (let txStart = 0; txStart < rows; txStart += SETUP_TRANSACTION_ROWS) { + const txEnd = Math.min(rows, txStart + SETUP_TRANSACTION_ROWS); + await withTransaction(database, async () => { + for (let offset = txStart; offset < txEnd; offset += LEDGER_BATCH_ROWS) { + const placeholders: string[] = []; + const args: unknown[] = []; + const batchEnd = Math.min(txEnd, offset + LEDGER_BATCH_ROWS); + for (let i = offset; i < batchEnd; i += 1) { + const accountId = `acct-${String(i % 256).padStart(4, "0")}`; + const entryId = Math.floor(i / 256) + 1; + placeholders.push("(?, ?, ?, ?, ?)"); + args.push( + accountId, + entryId, + (i % 2 === 0 ? 1 : -1) * (100 + (i % 10_000)), + 1_700_000_000_000 + i * 1000, + payload(`ledger-${accountId}-${entryId}:`, Math.min(rowBytes, 512)), + ); + } + await database.execute( + `INSERT INTO rw_ledger (account_id, entry_id, amount_cents, created_at, memo) VALUES ${placeholders.join(", ")}`, + ...args, + ); + } + }); + } + + return { + rows, + targetBytes, + rowBytes, + setupMs: performance.now() - startedAt, + pageCount: await queryPageCount(database), + }; +} + +async function seedMigrationSource( + database: { + execute: (sql: string, ...args: unknown[]) => Promise; + }, + targetBytes: number, + rowBytes: number, + skewed = false, +) { + await resetMigration(database); + await database.execute(`CREATE TABLE rw_migration_source ( + id INTEGER PRIMARY KEY, + account_id TEXT NOT NULL, + status TEXT NOT NULL, + created_at INTEGER NOT NULL, + total_cents INTEGER NOT NULL, + body TEXT NOT NULL + )`); + + const rows = Math.max(1, Math.ceil(targetBytes / rowBytes)); + const startedAt = performance.now(); + + for (let txStart = 0; txStart < rows; txStart += SETUP_TRANSACTION_ROWS) { + const txEnd = Math.min(rows, txStart + SETUP_TRANSACTION_ROWS); + await withTransaction(database, async () => { + for (let offset = txStart; offset < txEnd; offset += ORDER_BATCH_ROWS) { + const placeholders: string[] = []; + const args: unknown[] = []; + const batchEnd = Math.min(txEnd, offset + ORDER_BATCH_ROWS); + for (let i = offset; i < batchEnd; i += 1) { + const accountId = skewed + ? `acct-${i % 10 === 0 ? i % 512 : i % 8}` + : `acct-${pseudoRandom(i) % 512}`; + const status = skewed + ? i % 20 === 0 + ? "failed" + : "open" + : ["open", "closed", "failed", "pending"][i % 4]; + placeholders.push("(?, ?, ?, ?, ?, ?)"); + args.push( + i + 1, + accountId, + status, + 1_700_000_000_000 + i * 1000, + 100 + (pseudoRandom(i + 41) % 50_000), + payload(`migration-${i}:`, rowBytes), + ); + } + await database.execute( + `INSERT INTO rw_migration_source (id, account_id, status, created_at, total_cents, body) VALUES ${placeholders.join(", ")}`, + ...args, + ); + } + }); + } + + return { + rows, + targetBytes, + rowBytes, + setupMs: performance.now() - startedAt, + pageCount: await queryPageCount(database), + }; +} + +async function readRowidRange( + database: { + execute: (sql: string, ...args: unknown[]) => Promise; + }, + direction: "forward" | "backward", +) { + const [count] = typedRows( + await database.execute("SELECT COUNT(*) AS rows FROM rw_orders"), + ); + const rows = count?.rows ?? 0; + let bytes = 0; + let scannedRows = 0; + + if (direction === "backward") { + for (let upper = rows; upper > 0; upper -= RANGE_CHUNK_ROWS) { + const lower = Math.max(1, upper - RANGE_CHUNK_ROWS + 1); + const chunk = typedRows( + await database.execute( + `SELECT length(note) AS bytes FROM rw_orders WHERE id BETWEEN ? AND ? ORDER BY id DESC`, + lower, + upper, + ), + ); + for (const row of chunk) { + bytes += row.bytes; + scannedRows += 1; + } + } + return { rows: scannedRows, bytes }; + } + + for (let lower = 1; lower <= rows; lower += RANGE_CHUNK_ROWS) { + const upper = lower + RANGE_CHUNK_ROWS - 1; + const [chunk] = typedRows<{ rows: number; bytes: number }>( + await database.execute( + `SELECT COUNT(*) AS rows, COALESCE(SUM(length(note)), 0) AS bytes FROM rw_orders WHERE id BETWEEN ? AND ?`, + lower, + upper, + ), + ); + bytes += chunk?.bytes ?? 0; + scannedRows += chunk?.rows ?? 0; + } + + return { rows: scannedRows, bytes }; +} + +export const sqliteRealworldBench = actor({ + options: { + actionTimeout: 1_200_000, + sleepGracePeriod: 30_000, + }, + db: db({ + onMigrate: async (database) => { + await database.execute(`CREATE TABLE IF NOT EXISTS rw_customers ( + id INTEGER PRIMARY KEY, + account_id TEXT NOT NULL, + email TEXT NOT NULL, + plan TEXT NOT NULL, + region TEXT NOT NULL + )`); + await database.execute(`CREATE TABLE IF NOT EXISTS rw_orders ( + id INTEGER PRIMARY KEY, + customer_id INTEGER NOT NULL, + created_at INTEGER NOT NULL, + status TEXT NOT NULL, + total_cents INTEGER NOT NULL, + shard INTEGER NOT NULL, + note TEXT NOT NULL + )`); + await database.execute(`CREATE TABLE IF NOT EXISTS rw_order_items ( + id INTEGER PRIMARY KEY AUTOINCREMENT, + order_id INTEGER NOT NULL, + sku TEXT NOT NULL, + quantity INTEGER NOT NULL, + price_cents INTEGER NOT NULL, + line_no INTEGER NOT NULL + )`); + await database.execute(`CREATE TABLE IF NOT EXISTS rw_events ( + id INTEGER PRIMARY KEY AUTOINCREMENT, + account_id TEXT NOT NULL, + event_type TEXT NOT NULL, + created_at INTEGER NOT NULL, + entity_key TEXT NOT NULL, + properties TEXT NOT NULL + )`); + await database.execute(`CREATE TABLE IF NOT EXISTS rw_docs ( + id INTEGER PRIMARY KEY AUTOINCREMENT, + external_key TEXT NOT NULL UNIQUE, + row_rank INTEGER NOT NULL, + tenant_id TEXT NOT NULL, + body TEXT NOT NULL, + body_bytes INTEGER NOT NULL + )`); + await database.execute(`CREATE TABLE IF NOT EXISTS rw_ledger ( + account_id TEXT NOT NULL, + entry_id INTEGER NOT NULL, + amount_cents INTEGER NOT NULL, + created_at INTEGER NOT NULL, + memo TEXT NOT NULL, + PRIMARY KEY (account_id, entry_id) + ) WITHOUT ROWID`); + await database.execute( + "CREATE INDEX IF NOT EXISTS idx_rw_orders_customer_created ON rw_orders(customer_id, created_at DESC)", + ); + await database.execute( + "CREATE INDEX IF NOT EXISTS idx_rw_orders_status_created ON rw_orders(status, created_at)", + ); + await database.execute( + "CREATE INDEX IF NOT EXISTS idx_rw_orders_created ON rw_orders(created_at DESC)", + ); + await database.execute( + "CREATE INDEX IF NOT EXISTS idx_rw_order_items_order ON rw_order_items(order_id)", + ); + await database.execute( + "CREATE INDEX IF NOT EXISTS idx_rw_events_account_created ON rw_events(account_id, created_at)", + ); + await database.execute( + "CREATE INDEX IF NOT EXISTS idx_rw_docs_external_rank ON rw_docs(external_key, row_rank)", + ); + await database.execute( + "CREATE INDEX IF NOT EXISTS idx_rw_docs_tenant_rank ON rw_docs(tenant_id, row_rank)", + ); + }, + }), + actions: { + inspectCacheConfig: async (c) => { + const [cacheSize] = typedRows( + await c.db.execute("PRAGMA cache_size"), + ); + const [pageSize] = typedRows( + await c.db.execute("PRAGMA page_size"), + ); + return { + sqliteCacheSizePragma: cacheSize?.cache_size ?? null, + sqlitePageSize: pageSize?.page_size ?? null, + pageCount: await queryPageCount(c.db), + }; + }, + + setupWorkload: async (c, input: SetupInput) => { + assertWorkload(input.workload); + const rowBytes = positiveInteger(input.rowBytes, DEFAULT_ROW_BYTES, "rowBytes"); + if (input.workload === "migration-ddl-small") { + await resetMigration(c.db); + return { + rows: 0, + targetBytes: 0, + rowBytes, + setupMs: 0, + pageCount: await queryPageCount(c.db), + }; + } + const targetBytes = positiveInteger( + input.targetBytes, + 8 * 1024 * 1024, + "targetBytes", + ); + + switch (input.workload) { + case "small-rowid-point": + case "small-schema-read": + case "small-range-scan": + case "rowid-range-forward": + case "rowid-range-backward": + case "aggregate-status": + case "aggregate-time-bucket": + case "aggregate-tenant-time-range": + case "parallel-read-aggregates": + case "parallel-read-write-transition": + case "feed-order-by-limit": + case "feed-pagination-adjacent": + case "join-order-items": + case "random-point-lookups": + case "write-batch-after-wake": + case "update-hot-partition": + case "delete-churn-range-read": + return seedCommerce(c.db, targetBytes, rowBytes); + case "secondary-index-covering-range": + case "secondary-index-scattered-table": + case "hot-index-cold-table": + return seedDocs(c.db, targetBytes, rowBytes); + case "ledger-without-rowid-range": + return seedLedger(c.db, targetBytes, rowBytes); + case "migration-create-indexes-large": + return seedMigrationSource(c.db, targetBytes, rowBytes); + case "migration-create-indexes-skewed-large": + return seedMigrationSource(c.db, targetBytes, rowBytes, true); + case "migration-table-rebuild-large": + case "migration-add-column-large": + return seedMigrationSource(c.db, targetBytes, rowBytes); + } + }, + + runWorkload: async (c, input: RunInput) => { + assertWorkload(input.workload); + const t0 = performance.now(); + let details: Record; + + switch (input.workload) { + case "small-rowid-point": { + let bytes = 0; + for (let i = 0; i < 50; i += 1) { + const id = (i % 16) + 1; + const [row] = typedRows( + await c.db.execute( + "SELECT length(note) AS bytes FROM rw_orders WHERE id = ?", + id, + ), + ); + bytes += row?.bytes ?? 0; + } + details = { ops: 50, bytes }; + break; + } + case "small-schema-read": { + const tables = await c.db.execute( + "SELECT name, type FROM sqlite_master WHERE type IN ('table', 'index') ORDER BY name", + ); + const columns = await c.db.execute("PRAGMA table_info(rw_orders)"); + const [count] = typedRows( + await c.db.execute("SELECT COUNT(*) AS rows FROM rw_orders"), + ); + details = { + objects: tables.length, + columns: columns.length, + rows: count?.rows ?? 0, + }; + break; + } + case "small-range-scan": + case "rowid-range-forward": { + details = await readRowidRange(c.db, "forward"); + break; + } + case "rowid-range-backward": { + details = await readRowidRange(c.db, "backward"); + break; + } + case "secondary-index-covering-range": { + const rows = typedRows<{ external_key: string; row_rank: number }>( + await c.db.execute( + `SELECT external_key, row_rank FROM rw_docs + WHERE external_key BETWEEN 'doc-00000000' AND 'doc-ffffffff' + ORDER BY external_key`, + ), + ); + let checksum = 0; + for (const row of rows) checksum = (checksum + row.row_rank) >>> 0; + details = { rows: rows.length, checksum }; + break; + } + case "secondary-index-scattered-table": { + const rows = typedRows( + await c.db.execute( + `SELECT body_bytes AS bytes FROM rw_docs + WHERE external_key BETWEEN 'doc-00000000' AND 'doc-ffffffff' + ORDER BY external_key`, + ), + ); + let bytes = 0; + for (const row of rows) bytes += row.bytes; + details = { rows: rows.length, bytes }; + break; + } + case "aggregate-status": { + const rows = typedRows( + await c.db.execute( + `SELECT status, COUNT(*) AS rows, SUM(total_cents) AS total + FROM rw_orders + GROUP BY status + ORDER BY status`, + ), + ); + details = { + groups: rows.length, + rows: rows.reduce((sum, row) => sum + row.rows, 0), + total: rows.reduce((sum, row) => sum + row.total, 0), + }; + break; + } + case "aggregate-time-bucket": { + const rows = typedRows( + await c.db.execute( + `SELECT (created_at / 300000) AS bucket, COUNT(*) AS rows, SUM(total_cents) AS total + FROM rw_orders + GROUP BY bucket + ORDER BY bucket`, + ), + ); + details = { + buckets: rows.length, + rows: rows.reduce((sum, row) => sum + row.rows, 0), + total: rows.reduce((sum, row) => sum + row.total, 0), + }; + break; + } + case "aggregate-tenant-time-range": { + const rows = typedRows( + await c.db.execute( + `SELECT e.event_type, COUNT(*) AS rows, SUM(o.total_cents) AS total + FROM rw_events e + JOIN rw_orders o ON o.id = CAST(substr(e.entity_key, 7) AS INTEGER) + WHERE e.account_id = ? AND e.created_at BETWEEN ? AND ? + GROUP BY e.event_type + ORDER BY e.event_type`, + "acct-7", + 1_700_000_000_000, + 1_700_000_000_000 + 86_400_000, + ), + ); + details = { + groups: rows.length, + rows: rows.reduce((sum, row) => sum + row.rows, 0), + total: rows.reduce((sum, row) => sum + row.total, 0), + }; + break; + } + case "parallel-read-aggregates": { + const [ + statusRows, + bucketRows, + tenantRows, + joinRows, + ] = await Promise.all([ + c.db.execute( + `SELECT status, COUNT(*) AS rows, SUM(total_cents) AS total + FROM rw_orders + GROUP BY status + ORDER BY status`, + ), + c.db.execute( + `SELECT (created_at / 300000) AS bucket, COUNT(*) AS rows, SUM(total_cents) AS total + FROM rw_orders + GROUP BY bucket + ORDER BY bucket`, + ), + c.db.execute( + `SELECT e.event_type, COUNT(*) AS rows, SUM(o.total_cents) AS total + FROM rw_events e + JOIN rw_orders o ON o.id = CAST(substr(e.entity_key, 7) AS INTEGER) + WHERE e.account_id = ? AND e.created_at BETWEEN ? AND ? + GROUP BY e.event_type + ORDER BY e.event_type`, + "acct-7", + 1_700_000_000_000, + 1_700_000_000_000 + 86_400_000, + ), + c.db.execute( + `SELECT o.status, COUNT(*) AS rows, SUM(oi.quantity * oi.price_cents) AS total + FROM rw_orders o + JOIN rw_order_items oi ON oi.order_id = o.id + GROUP BY o.status + ORDER BY o.status`, + ), + ]); + const aggregates = [ + ...typedRows(statusRows), + ...typedRows(bucketRows), + ...typedRows(tenantRows), + ...typedRows(joinRows), + ]; + details = { + ops: 4, + groups: aggregates.length, + rows: aggregates.reduce((sum, row) => sum + row.rows, 0), + total: aggregates.reduce((sum, row) => sum + row.total, 0), + }; + break; + } + case "parallel-read-write-transition": { + const readStatus = c.db.execute( + `SELECT status, COUNT(*) AS rows, SUM(total_cents) AS total + FROM rw_orders + GROUP BY status + ORDER BY status`, + ); + const readJoin = c.db.execute( + `SELECT o.status, COUNT(*) AS rows, SUM(oi.quantity * oi.price_cents) AS total + FROM rw_orders o + JOIN rw_order_items oi ON oi.order_id = o.id + GROUP BY o.status + ORDER BY o.status`, + ); + const writeHotShard = c.db.execute( + "UPDATE rw_orders SET total_cents = total_cents + 1 WHERE shard BETWEEN 0 AND 7", + ); + const readAfterWrite = c.db.execute( + "SELECT COUNT(*) AS rows FROM rw_orders WHERE shard BETWEEN 0 AND 7", + ); + const [statusRows, joinRows, , shardRows] = await Promise.all([ + readStatus, + readJoin, + writeHotShard, + readAfterWrite, + ]); + const aggregates = [ + ...typedRows(statusRows), + ...typedRows(joinRows), + ]; + const [shardCount] = typedRows(shardRows); + details = { + ops: 4, + readOps: 3, + writeOps: 1, + groups: aggregates.length, + rows: + aggregates.reduce((sum, row) => sum + row.rows, 0) + + (shardCount?.rows ?? 0), + total: aggregates.reduce((sum, row) => sum + row.total, 0), + }; + break; + } + case "feed-order-by-limit": { + const rows = await c.db.execute( + `SELECT id, customer_id, created_at, status, total_cents + FROM rw_orders + WHERE created_at >= ? + ORDER BY created_at DESC + LIMIT 1000`, + 1_700_000_000_000, + ); + details = { rows: rows.length }; + break; + } + case "feed-pagination-adjacent": { + const firstPage = typedRows<{ created_at: number }>( + await c.db.execute( + `SELECT created_at + FROM rw_orders + WHERE created_at >= ? + ORDER BY created_at DESC + LIMIT ?`, + 1_700_000_000_000, + FEED_PAGE_ROWS, + ), + ); + const cursor = firstPage.at(-1)?.created_at ?? 1_700_000_000_000; + const secondPage = await c.db.execute( + `SELECT id, customer_id, created_at, status, total_cents + FROM rw_orders + WHERE created_at < ? + ORDER BY created_at DESC + LIMIT ?`, + cursor, + FEED_PAGE_ROWS, + ); + details = { firstPageRows: firstPage.length, rows: secondPage.length }; + break; + } + case "join-order-items": { + const rows = typedRows( + await c.db.execute( + `SELECT o.status, COUNT(*) AS rows, SUM(oi.quantity * oi.price_cents) AS total + FROM rw_orders o + JOIN rw_order_items oi ON oi.order_id = o.id + GROUP BY o.status + ORDER BY o.status`, + ), + ); + details = { + groups: rows.length, + rows: rows.reduce((sum, row) => sum + row.rows, 0), + total: rows.reduce((sum, row) => sum + row.total, 0), + }; + break; + } + case "random-point-lookups": { + const [count] = typedRows( + await c.db.execute("SELECT COUNT(*) AS rows FROM rw_orders"), + ); + const rows = Math.max(1, count?.rows ?? 1); + let bytes = 0; + for (let i = 0; i < POINT_LOOKUP_OPS; i += 1) { + const id = (pseudoRandom(i) % rows) + 1; + const [row] = typedRows( + await c.db.execute( + "SELECT length(note) AS bytes FROM rw_orders WHERE id = ?", + id, + ), + ); + bytes += row?.bytes ?? 0; + } + details = { ops: POINT_LOOKUP_OPS, bytes }; + break; + } + case "hot-index-cold-table": { + const indexRows = typedRows<{ id: number }>( + await c.db.execute( + `SELECT id + FROM rw_docs + WHERE tenant_id = ? + ORDER BY row_rank + LIMIT 1000`, + "tenant-7", + ), + ); + let bytes = 0; + for (const row of indexRows) { + const [doc] = typedRows( + await c.db.execute( + "SELECT body_bytes AS bytes FROM rw_docs WHERE id = ?", + row.id, + ), + ); + bytes += doc?.bytes ?? 0; + } + details = { rows: indexRows.length, bytes }; + break; + } + case "ledger-without-rowid-range": { + const rows = typedRows( + await c.db.execute( + `SELECT account_id, entry_id, amount_cents, length(memo) AS bytes + FROM rw_ledger + WHERE account_id BETWEEN 'acct-0040' AND 'acct-0180' + ORDER BY account_id, entry_id`, + ), + ); + let bytes = 0; + for (const row of rows) bytes += row.bytes; + details = { rows: rows.length, bytes }; + break; + } + case "write-batch-after-wake": { + const [count] = typedRows( + await c.db.execute("SELECT COUNT(*) AS rows FROM rw_orders"), + ); + const startId = (count?.rows ?? 0) + 1; + await c.db.execute("BEGIN"); + for (let offset = 0; offset < 1000; offset += ORDER_BATCH_ROWS) { + const placeholders: string[] = []; + const args: unknown[] = []; + for (let i = offset; i < offset + ORDER_BATCH_ROWS; i += 1) { + const id = startId + i; + placeholders.push("(?, ?, ?, ?, ?, ?, ?)"); + args.push( + id, + (i % 128) + 1, + 1_800_000_000_000 + i, + "pending", + 1000 + i, + i % 128, + payload(`wake-insert-${id}:`, DEFAULT_ROW_BYTES), + ); + } + await c.db.execute( + `INSERT INTO rw_orders (id, customer_id, created_at, status, total_cents, shard, note) VALUES ${placeholders.join(", ")}`, + ...args, + ); + } + await c.db.execute("COMMIT"); + details = { rows: 1000 }; + break; + } + case "update-hot-partition": { + await c.db.execute( + "UPDATE rw_orders SET total_cents = total_cents + 1 WHERE shard BETWEEN 0 AND 15", + ); + const [count] = typedRows( + await c.db.execute( + "SELECT COUNT(*) AS rows FROM rw_orders WHERE shard BETWEEN 0 AND 15", + ), + ); + details = { rows: count?.rows ?? 0 }; + break; + } + case "delete-churn-range-read": { + await c.db.execute("DELETE FROM rw_orders WHERE shard BETWEEN 0 AND 15"); + const result = await readRowidRange(c.db, "forward"); + details = { + ...result, + deletedShardCount: 16, + }; + break; + } + case "migration-create-indexes-large": { + await c.db.execute( + "CREATE INDEX idx_rw_migration_source_account ON rw_migration_source(account_id)", + ); + await c.db.execute( + "CREATE INDEX idx_rw_migration_source_created ON rw_migration_source(created_at)", + ); + await c.db.execute( + "CREATE INDEX idx_rw_migration_source_status_total ON rw_migration_source(status, total_cents)", + ); + details = { indexes: 3 }; + break; + } + case "migration-create-indexes-skewed-large": { + await c.db.execute( + "CREATE INDEX idx_rw_migration_source_skew_account ON rw_migration_source(account_id, created_at)", + ); + await c.db.execute( + "CREATE INDEX idx_rw_migration_source_skew_status ON rw_migration_source(status, total_cents)", + ); + details = { indexes: 2, skewed: true }; + break; + } + case "migration-table-rebuild-large": { + await c.db.execute(`CREATE TABLE rw_migration_source_rebuilt ( + id INTEGER PRIMARY KEY, + account_id TEXT NOT NULL, + status TEXT NOT NULL, + created_at INTEGER NOT NULL, + total_cents INTEGER NOT NULL, + body TEXT NOT NULL, + archived_at INTEGER + )`); + await c.db.execute(`INSERT INTO rw_migration_source_rebuilt ( + id, account_id, status, created_at, total_cents, body, archived_at + ) + SELECT id, account_id, status, created_at, total_cents, body, NULL + FROM rw_migration_source`); + await c.db.execute("DROP TABLE rw_migration_source"); + await c.db.execute( + "ALTER TABLE rw_migration_source_rebuilt RENAME TO rw_migration_source", + ); + details = { rebuilt: true }; + break; + } + case "migration-add-column-large": { + await c.db.execute( + "ALTER TABLE rw_migration_source ADD COLUMN archived_at INTEGER", + ); + details = { alters: 1, rewritesRows: false }; + break; + } + case "migration-ddl-small": { + await c.db.execute(`CREATE TABLE rw_migration_empty ( + id INTEGER PRIMARY KEY, + tenant_id TEXT NOT NULL, + created_at INTEGER NOT NULL + )`); + await c.db.execute("ALTER TABLE rw_migration_empty ADD COLUMN status TEXT"); + await c.db.execute( + "CREATE INDEX idx_rw_migration_empty_tenant_created ON rw_migration_empty(tenant_id, created_at)", + ); + await c.db.execute(`CREATE TABLE rw_migration_audit ( + id INTEGER PRIMARY KEY, + migration_name TEXT NOT NULL, + applied_at INTEGER NOT NULL + )`); + details = { tables: 2, indexes: 1, alters: 1 }; + break; + } + } + + const ms = performance.now() - t0; + return { + ms, + workload: input.workload, + ...details, + pageCount: await queryPageCount(c.db), + }; + }, + + goToSleep: (c) => { + c.sleep(); + return { ok: true }; + }, + }, +}); diff --git a/examples/kitchen-sink/src/index.ts b/examples/kitchen-sink/src/index.ts index 18c8f8f414..34c21aa063 100644 --- a/examples/kitchen-sink/src/index.ts +++ b/examples/kitchen-sink/src/index.ts @@ -118,6 +118,7 @@ import { testCounterSqlite } from "./actors/testing/test-counter-sqlite.ts"; import { testSqliteLoad } from "./actors/testing/test-sqlite-load.ts"; import { testSqliteBench } from "./actors/testing/test-sqlite-bench.ts"; import { sqliteColdStartBench } from "./actors/testing/sqlite-cold-start-bench.ts"; +import { sqliteRealworldBench } from "./actors/testing/sqlite-realworld-bench.ts"; import { rawSqliteFuzzer } from "./actors/testing/raw-sqlite-fuzzer.ts"; // AI import { aiAgent } from "./actors/ai/ai-agent.ts"; @@ -256,6 +257,7 @@ export const registry = setup({ testSqliteLoad, testSqliteBench, sqliteColdStartBench, + sqliteRealworldBench, rawSqliteFuzzer, // AI aiAgent, diff --git a/examples/kitchen-sink/tests/sqlite-realworld-bench.test.ts b/examples/kitchen-sink/tests/sqlite-realworld-bench.test.ts new file mode 100644 index 0000000000..07cb7d4ac5 --- /dev/null +++ b/examples/kitchen-sink/tests/sqlite-realworld-bench.test.ts @@ -0,0 +1,56 @@ +import assert from "node:assert/strict"; +import { readFileSync } from "node:fs"; +import { test } from "node:test"; +import { fileURLToPath } from "node:url"; + +const root = fileURLToPath(new URL("..", import.meta.url)); +const runnerPath = `${root}/scripts/sqlite-realworld-bench.ts`; +const actorPath = `${root}/src/actors/testing/sqlite-realworld-bench.ts`; + +function read(path: string) { + return readFileSync(path, "utf8"); +} + +function extractWorkloads(source: string) { + const match = /const WORKLOADS = \[([\s\S]*?)\] as const;/.exec(source); + assert.ok(match, "WORKLOADS catalog should exist"); + return [...match[1].matchAll(/"([^"]+)"/g)].map((entry) => entry[1]); +} + +test("SQLite real-world benchmark catalogs stay in sync", () => { + const runnerWorkloads = extractWorkloads(read(runnerPath)); + const actorWorkloads = extractWorkloads(read(actorPath)); + + assert.deepEqual(actorWorkloads, runnerWorkloads); +}); + +test("SQLite real-world benchmark includes read-mode/write-mode scenarios", () => { + const runner = read(runnerPath); + const actor = read(actorPath); + + for (const workload of [ + "parallel-read-aggregates", + "parallel-read-write-transition", + ]) { + assert.match(runner, new RegExp(`name: "${workload}"`)); + assert.match(actor, new RegExp(`case "${workload}"`)); + } + + assert.match( + runner, + /read mode may hold multiple read-only connections, while write mode must close readers and hold exactly one writable connection|read-mode to write-mode transition|read-only SQLite connections overlap VFS misses/, + ); + assert.match(actor, /Promise\.all\(\[/); + assert.match(actor, /UPDATE rw_orders SET total_cents = total_cents \+ 1/); + for (const metric of [ + "sqlite_read_pool_routed_read_queries_total", + "sqlite_read_pool_write_fallback_queries_total", + "sqlite_read_pool_mode_transitions_total", + ]) { + assert.match(runner, new RegExp(metric)); + } + assert.match( + runner, + /\| workload \| category \| size \| server_ms \| routed_reads \| write_fallbacks \| mode_transitions \|/, + ); +}); diff --git a/rivetkit-rust/packages/rivetkit-core/src/actor/context.rs b/rivetkit-rust/packages/rivetkit-core/src/actor/context.rs index 19b109ed29..aa042e1c19 100644 --- a/rivetkit-rust/packages/rivetkit-core/src/actor/context.rs +++ b/rivetkit-rust/packages/rivetkit-core/src/actor/context.rs @@ -367,6 +367,10 @@ impl ActorContext { self.0.sql.query_rows_cbor(sql, params).await } + pub async fn db_execute(&self, sql: &str, params: Option<&[u8]>) -> Result> { + self.0.sql.execute_rows_cbor(sql, params).await + } + pub async fn db_run(&self, sql: &str, params: Option<&[u8]>) -> Result<()> { self.0.sql.run_cbor(sql, params).await?; Ok(()) diff --git a/rivetkit-rust/packages/rivetkit-core/src/actor/metrics.rs b/rivetkit-rust/packages/rivetkit-core/src/actor/metrics.rs index 1707fbce79..180664f438 100644 --- a/rivetkit-rust/packages/rivetkit-core/src/actor/metrics.rs +++ b/rivetkit-rust/packages/rivetkit-core/src/actor/metrics.rs @@ -64,6 +64,28 @@ struct ActorMetricsInner { sqlite_vfs_commit_phase_duration_seconds_total: CounterVec, #[cfg(feature = "sqlite")] sqlite_vfs_commit_duration_seconds_total: CounterVec, + #[cfg(feature = "sqlite")] + sqlite_read_pool_active_readers: IntGauge, + #[cfg(feature = "sqlite")] + sqlite_read_pool_idle_readers: IntGauge, + #[cfg(feature = "sqlite")] + sqlite_read_pool_read_wait_duration_seconds: Histogram, + #[cfg(feature = "sqlite")] + sqlite_read_pool_write_wait_duration_seconds: Histogram, + #[cfg(feature = "sqlite")] + sqlite_read_pool_routed_read_queries_total: IntCounter, + #[cfg(feature = "sqlite")] + sqlite_read_pool_write_fallback_queries_total: IntCounter, + #[cfg(feature = "sqlite")] + sqlite_read_pool_manual_transaction_duration_seconds: Histogram, + #[cfg(feature = "sqlite")] + sqlite_read_pool_reader_opens_total: IntCounter, + #[cfg(feature = "sqlite")] + sqlite_read_pool_reader_closes_total: IntCounter, + #[cfg(feature = "sqlite")] + sqlite_read_pool_rejected_reader_mutations_total: IntCounter, + #[cfg(feature = "sqlite")] + sqlite_read_pool_mode_transitions_total: CounterVec, } impl ActorMetrics { @@ -301,6 +323,84 @@ impl ActorMetrics { &["phase"], ) .context("create sqlite_vfs_commit_duration_seconds_total counter")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_active_readers = IntGauge::with_opts(Opts::new( + "sqlite_read_pool_active_readers", + "current active SQLite read-pool readers", + )) + .context("create sqlite_read_pool_active_readers gauge")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_idle_readers = IntGauge::with_opts(Opts::new( + "sqlite_read_pool_idle_readers", + "current idle SQLite read-pool readers", + )) + .context("create sqlite_read_pool_idle_readers gauge")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_read_wait_duration_seconds = Histogram::with_opts( + HistogramOpts::new( + "sqlite_read_pool_read_wait_duration_seconds", + "SQLite read-pool read admission wait duration in seconds", + ) + .buckets(sqlite_pool_wait_buckets()), + ) + .context("create sqlite_read_pool_read_wait_duration_seconds histogram")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_write_wait_duration_seconds = Histogram::with_opts( + HistogramOpts::new( + "sqlite_read_pool_write_wait_duration_seconds", + "SQLite read-pool write-mode admission wait duration in seconds", + ) + .buckets(sqlite_pool_wait_buckets()), + ) + .context("create sqlite_read_pool_write_wait_duration_seconds histogram")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_routed_read_queries_total = IntCounter::with_opts(Opts::new( + "sqlite_read_pool_routed_read_queries_total", + "total SQLite statements routed to read-pool readers", + )) + .context("create sqlite_read_pool_routed_read_queries_total counter")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_write_fallback_queries_total = IntCounter::with_opts(Opts::new( + "sqlite_read_pool_write_fallback_queries_total", + "total SQLite statements routed to write mode as read-pool fallbacks", + )) + .context("create sqlite_read_pool_write_fallback_queries_total counter")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_manual_transaction_duration_seconds = Histogram::with_opts( + HistogramOpts::new( + "sqlite_read_pool_manual_transaction_duration_seconds", + "SQLite read-pool manual transaction write-mode duration in seconds", + ) + .buckets(sqlite_pool_wait_buckets()), + ) + .context("create sqlite_read_pool_manual_transaction_duration_seconds histogram")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_reader_opens_total = IntCounter::with_opts(Opts::new( + "sqlite_read_pool_reader_opens_total", + "total SQLite read-pool reader connection opens", + )) + .context("create sqlite_read_pool_reader_opens_total counter")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_reader_closes_total = IntCounter::with_opts(Opts::new( + "sqlite_read_pool_reader_closes_total", + "total SQLite read-pool reader connection closes", + )) + .context("create sqlite_read_pool_reader_closes_total counter")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_rejected_reader_mutations_total = IntCounter::with_opts(Opts::new( + "sqlite_read_pool_rejected_reader_mutations_total", + "total SQLite reader mutation attempts rejected by read-pool safeguards", + )) + .context("create sqlite_read_pool_rejected_reader_mutations_total counter")?; + #[cfg(feature = "sqlite")] + let sqlite_read_pool_mode_transitions_total = CounterVec::new( + Opts::new( + "sqlite_read_pool_mode_transitions_total", + "total SQLite read-pool mode transitions", + ), + &["from", "to"], + ) + .context("create sqlite_read_pool_mode_transitions_total counter")?; register_metric(®istry, create_state_ms.clone()); register_metric(®istry, create_vars_ms.clone()); @@ -339,6 +439,29 @@ impl ActorMetrics { sqlite_vfs_commit_phase_duration_seconds_total.clone(), ); register_metric(®istry, sqlite_vfs_commit_duration_seconds_total.clone()); + register_metric(®istry, sqlite_read_pool_active_readers.clone()); + register_metric(®istry, sqlite_read_pool_idle_readers.clone()); + register_metric( + ®istry, + sqlite_read_pool_read_wait_duration_seconds.clone(), + ); + register_metric( + ®istry, + sqlite_read_pool_write_wait_duration_seconds.clone(), + ); + register_metric(®istry, sqlite_read_pool_routed_read_queries_total.clone()); + register_metric(®istry, sqlite_read_pool_write_fallback_queries_total.clone()); + register_metric( + ®istry, + sqlite_read_pool_manual_transaction_duration_seconds.clone(), + ); + register_metric(®istry, sqlite_read_pool_reader_opens_total.clone()); + register_metric(®istry, sqlite_read_pool_reader_closes_total.clone()); + register_metric( + ®istry, + sqlite_read_pool_rejected_reader_mutations_total.clone(), + ); + register_metric(®istry, sqlite_read_pool_mode_transitions_total.clone()); } for kind in UserTaskKind::ALL { @@ -360,6 +483,17 @@ impl ActorMetrics { sqlite_vfs_commit_phase_duration_seconds_total.with_label_values(&[phase]); } sqlite_vfs_commit_duration_seconds_total.with_label_values(&["total"]); + for (from, to) in [ + ("closed", "read"), + ("closed", "write"), + ("read", "write"), + ("write", "read"), + ("read", "closing"), + ("write", "closing"), + ("closing", "closed"), + ] { + sqlite_read_pool_mode_transitions_total.with_label_values(&[from, to]); + } } Ok(ActorMetricsInner { @@ -409,6 +543,28 @@ impl ActorMetrics { sqlite_vfs_commit_phase_duration_seconds_total, #[cfg(feature = "sqlite")] sqlite_vfs_commit_duration_seconds_total, + #[cfg(feature = "sqlite")] + sqlite_read_pool_active_readers, + #[cfg(feature = "sqlite")] + sqlite_read_pool_idle_readers, + #[cfg(feature = "sqlite")] + sqlite_read_pool_read_wait_duration_seconds, + #[cfg(feature = "sqlite")] + sqlite_read_pool_write_wait_duration_seconds, + #[cfg(feature = "sqlite")] + sqlite_read_pool_routed_read_queries_total, + #[cfg(feature = "sqlite")] + sqlite_read_pool_write_fallback_queries_total, + #[cfg(feature = "sqlite")] + sqlite_read_pool_manual_transaction_duration_seconds, + #[cfg(feature = "sqlite")] + sqlite_read_pool_reader_opens_total, + #[cfg(feature = "sqlite")] + sqlite_read_pool_reader_closes_total, + #[cfg(feature = "sqlite")] + sqlite_read_pool_rejected_reader_mutations_total, + #[cfg(feature = "sqlite")] + sqlite_read_pool_mode_transitions_total, }) } @@ -693,6 +849,96 @@ impl rivetkit_sqlite::vfs::SqliteVfsMetrics for ActorMetrics { .with_label_values(&["total"]) .inc_by(ns_to_seconds(total_ns)); } + + fn set_read_pool_active_readers(&self, readers: u64) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner + .sqlite_read_pool_active_readers + .set(readers.try_into().unwrap_or(i64::MAX)); + } + + fn set_read_pool_idle_readers(&self, readers: u64) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner + .sqlite_read_pool_idle_readers + .set(readers.try_into().unwrap_or(i64::MAX)); + } + + fn observe_read_pool_read_wait(&self, duration: Duration) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner + .sqlite_read_pool_read_wait_duration_seconds + .observe(duration.as_secs_f64()); + } + + fn observe_read_pool_write_wait(&self, duration: Duration) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner + .sqlite_read_pool_write_wait_duration_seconds + .observe(duration.as_secs_f64()); + } + + fn record_read_pool_routed_read_query(&self) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner.sqlite_read_pool_routed_read_queries_total.inc(); + } + + fn record_read_pool_write_fallback_query(&self) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner.sqlite_read_pool_write_fallback_queries_total.inc(); + } + + fn observe_read_pool_manual_transaction(&self, duration: Duration) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner + .sqlite_read_pool_manual_transaction_duration_seconds + .observe(duration.as_secs_f64()); + } + + fn record_read_pool_reader_open(&self) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner.sqlite_read_pool_reader_opens_total.inc(); + } + + fn record_read_pool_reader_close(&self, count: u64) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner.sqlite_read_pool_reader_closes_total.inc_by(count); + } + + fn record_read_pool_rejected_reader_mutation(&self) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner.sqlite_read_pool_rejected_reader_mutations_total.inc(); + } + + fn record_read_pool_mode_transition(&self, from: &str, to: &str) { + let Some(inner) = self.inner.as_ref().as_ref() else { + return; + }; + inner + .sqlite_read_pool_mode_transitions_total + .with_label_values(&[from, to]) + .inc(); + } } impl Default for ActorMetrics { @@ -716,6 +962,14 @@ fn ns_to_seconds(duration_ns: u64) -> f64 { Duration::from_nanos(duration_ns).as_secs_f64() } +#[cfg(feature = "sqlite")] +fn sqlite_pool_wait_buckets() -> Vec { + vec![ + 0.000_1, 0.000_5, 0.001, 0.0025, 0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1.0, 2.5, + 5.0, + ] +} + fn register_metric(registry: &Registry, metric: M) where M: prometheus::core::Collector + Clone + Send + Sync + 'static, diff --git a/rivetkit-rust/packages/rivetkit-core/src/actor/mod.rs b/rivetkit-rust/packages/rivetkit-core/src/actor/mod.rs index 4a83a66064..bdb909f007 100644 --- a/rivetkit-rust/packages/rivetkit-core/src/actor/mod.rs +++ b/rivetkit-rust/packages/rivetkit-core/src/actor/mod.rs @@ -31,7 +31,9 @@ pub use queue::{ CompletableQueueMessage, EnqueueAndWaitOpts, QueueMessage, QueueNextBatchOpts, QueueNextOpts, QueueTryNextBatchOpts, QueueTryNextOpts, QueueWaitOpts, }; -pub use sqlite::{BindParam, ColumnValue, ExecResult, QueryResult, SqliteDb}; +pub use sqlite::{ + BindParam, ColumnValue, ExecResult, ExecuteResult, ExecuteRoute, QueryResult, SqliteDb, +}; pub use state::RequestSaveOpts; pub use task::{ ActionDispatchResult, ActorTask, DispatchCommand, HttpDispatchResult, LifecycleCommand, diff --git a/rivetkit-rust/packages/rivetkit-core/src/actor/sqlite.rs b/rivetkit-rust/packages/rivetkit-core/src/actor/sqlite.rs index 30ed64e71c..ea4a47ae78 100644 --- a/rivetkit-rust/packages/rivetkit-core/src/actor/sqlite.rs +++ b/rivetkit-rust/packages/rivetkit-core/src/actor/sqlite.rs @@ -15,6 +15,8 @@ use serde_json::{Map as JsonMap, Value as JsonValue}; #[cfg(feature = "sqlite")] use tokio::task::JoinHandle; #[cfg(feature = "sqlite")] +use tokio::sync::Mutex as AsyncMutex; +#[cfg(feature = "sqlite")] use tokio::time::{interval, timeout}; #[cfg(feature = "sqlite")] use tracing::Instrument; @@ -22,12 +24,13 @@ use tracing::Instrument; use crate::error::SqliteRuntimeError; #[cfg(feature = "sqlite")] -pub use rivetkit_sqlite::query::{BindParam, ColumnValue, ExecResult, QueryResult}; +pub use rivetkit_sqlite::query::{ + BindParam, ColumnValue, ExecResult, ExecuteResult, ExecuteRoute, QueryResult, +}; #[cfg(feature = "sqlite")] use rivetkit_sqlite::{ database::{NativeDatabaseHandle, open_database_from_envoy}, optimization_flags::sqlite_optimization_flags, - query::{exec_statements, execute_statement, query_statement}, vfs::{SqliteVfsMetrics, VfsPreloadHintSnapshot}, }; @@ -59,6 +62,24 @@ pub struct QueryResult { pub rows: Vec>, } +#[cfg(not(feature = "sqlite"))] +#[derive(Clone, Copy, Debug, PartialEq, Eq)] +pub enum ExecuteRoute { + Read, + Write, + WriteFallback, +} + +#[cfg(not(feature = "sqlite"))] +#[derive(Clone, Debug, PartialEq)] +pub struct ExecuteResult { + pub columns: Vec, + pub rows: Vec>, + pub changes: i64, + pub last_insert_row_id: Option, + pub route: ExecuteRoute, +} + #[cfg(not(feature = "sqlite"))] #[derive(Clone, Debug, PartialEq)] pub enum ColumnValue { @@ -86,10 +107,12 @@ pub struct SqliteDb { /// not a reliable signal for whether the user opted in; this flag is. enabled: bool, #[cfg(feature = "sqlite")] - // Forced-sync: native SQLite handles are used inside spawn_blocking and - // synchronous diagnostic accessors. + // Forced-sync: native SQLite handles are read from synchronous diagnostic + // accessors and closed from cleanup paths. db: Arc>>, #[cfg(feature = "sqlite")] + open_lock: Arc>, + #[cfg(feature = "sqlite")] // Forced-sync: the background task is spawned and aborted from sync cleanup // paths around the native database handle. preload_hint_flush_task: Arc>>>, @@ -112,6 +135,8 @@ impl SqliteDb { #[cfg(feature = "sqlite")] db: Default::default(), #[cfg(feature = "sqlite")] + open_lock: Default::default(), + #[cfg(feature = "sqlite")] preload_hint_flush_task: Default::default(), #[cfg(feature = "sqlite")] vfs_metrics: None, @@ -172,30 +197,25 @@ impl SqliteDb { pub async fn open(&self) -> Result<()> { #[cfg(feature = "sqlite")] { + let _open_guard = self.open_lock.lock().await; + if self.db.lock().is_some() { + return Ok(()); + } + let config = self.runtime_config()?; - let db = self.db.clone(); let vfs_metrics = self.vfs_metrics.clone(); let rt_handle = tokio::runtime::Handle::try_current() .context("open sqlite database requires a tokio runtime")?; - tokio::task::spawn_blocking(move || { - let mut guard = db.lock(); - if guard.is_some() { - return Ok::<(), anyhow::Error>(()); - } - - let native_db = open_database_from_envoy( - config.handle, - config.actor_id, - config.startup_data, - rt_handle, - vfs_metrics, - )?; - *guard = Some(native_db); - Ok(()) - }) - .await - .context("join sqlite open task")??; + let native_db = open_database_from_envoy( + config.handle, + config.actor_id, + config.startup_data, + rt_handle, + vfs_metrics, + ) + .await?; + *self.db.lock() = Some(native_db); self.ensure_preload_hint_flush_task()?; Ok(()) } @@ -211,16 +231,7 @@ impl SqliteDb { { self.open().await?; let sql = sql.into(); - let db = self.db.clone(); - tokio::task::spawn_blocking(move || { - let guard = db.lock(); - let native_db = guard - .as_ref() - .ok_or_else(|| SqliteRuntimeError::Closed.build())?; - exec_statements(native_db.as_ptr(), &sql) - }) - .await - .context("join sqlite exec task")? + self.native_db_handle()?.exec(sql).await } #[cfg(not(feature = "sqlite"))] @@ -239,16 +250,7 @@ impl SqliteDb { { self.open().await?; let sql = sql.into(); - let db = self.db.clone(); - tokio::task::spawn_blocking(move || { - let guard = db.lock(); - let native_db = guard - .as_ref() - .ok_or_else(|| SqliteRuntimeError::Closed.build())?; - query_statement(native_db.as_ptr(), &sql, params.as_deref()) - }) - .await - .context("join sqlite query task")? + self.native_db_handle()?.query(sql, params).await } #[cfg(not(feature = "sqlite"))] @@ -267,16 +269,45 @@ impl SqliteDb { { self.open().await?; let sql = sql.into(); - let db = self.db.clone(); - tokio::task::spawn_blocking(move || { - let guard = db.lock(); - let native_db = guard - .as_ref() - .ok_or_else(|| SqliteRuntimeError::Closed.build())?; - execute_statement(native_db.as_ptr(), &sql, params.as_deref()) - }) - .await - .context("join sqlite run task")? + self.native_db_handle()?.run(sql, params).await + } + + #[cfg(not(feature = "sqlite"))] + { + let _ = (sql, params); + Err(SqliteRuntimeError::Unavailable.build()) + } + } + + pub async fn execute( + &self, + sql: impl Into, + params: Option>, + ) -> Result { + #[cfg(feature = "sqlite")] + { + self.open().await?; + let sql = sql.into(); + self.native_db_handle()?.execute(sql, params).await + } + + #[cfg(not(feature = "sqlite"))] + { + let _ = (sql, params); + Err(SqliteRuntimeError::Unavailable.build()) + } + } + + pub async fn execute_write( + &self, + sql: impl Into, + params: Option>, + ) -> Result { + #[cfg(feature = "sqlite")] + { + self.open().await?; + let sql = sql.into(); + self.native_db_handle()?.execute_write(sql, params).await } #[cfg(not(feature = "sqlite"))] @@ -290,14 +321,11 @@ impl SqliteDb { #[cfg(feature = "sqlite")] { self.stop_preload_hint_flush_task(); - let db = self.db.clone(); - tokio::task::spawn_blocking(move || { - let mut guard = db.lock(); - guard.take(); - Ok(()) - }) - .await - .context("join sqlite close task")? + let native_db = self.db.lock().take(); + if let Some(native_db) = native_db { + native_db.close().await?; + } + Ok(()) } #[cfg(not(feature = "sqlite"))] @@ -402,6 +430,15 @@ impl SqliteDb { } } + #[cfg(feature = "sqlite")] + fn native_db_handle(&self) -> Result { + self.db + .lock() + .as_ref() + .cloned() + .ok_or_else(|| SqliteRuntimeError::Closed.build()) + } + pub fn runtime_config(&self) -> Result { Ok(SqliteRuntimeConfig { handle: self.handle()?, @@ -433,6 +470,19 @@ impl SqliteDb { self.run(sql.to_owned(), bind_params).await } + pub(crate) async fn execute_rows_cbor( + &self, + sql: &str, + params: Option<&[u8]>, + ) -> Result> { + let bind_params = bind_params_from_cbor(sql, params)?; + let result = self.execute(sql.to_owned(), bind_params).await?; + encode_json_as_cbor(&query_result_to_json_rows(&QueryResult { + columns: result.columns, + rows: result.rows, + })) + } + fn handle(&self) -> Result { self.handle .clone() diff --git a/rivetkit-rust/packages/rivetkit-core/src/registry/inspector.rs b/rivetkit-rust/packages/rivetkit-core/src/registry/inspector.rs index f04a65aff4..04bd1088e6 100644 --- a/rivetkit-rust/packages/rivetkit-core/src/registry/inspector.rs +++ b/rivetkit-rust/packages/rivetkit-core/src/registry/inspector.rs @@ -517,7 +517,7 @@ impl RegistryDispatcher { }; let rows = ctx - .db_query(&body.sql, params.as_deref()) + .db_execute(&body.sql, params.as_deref()) .await .context("run inspector database statement")?; Ok(decode_cbor_json_or_null(&rows)) diff --git a/rivetkit-rust/packages/rivetkit-core/tests/metrics.rs b/rivetkit-rust/packages/rivetkit-core/tests/metrics.rs index 61eccc978f..0e6e291a0f 100644 --- a/rivetkit-rust/packages/rivetkit-core/tests/metrics.rs +++ b/rivetkit-rust/packages/rivetkit-core/tests/metrics.rs @@ -34,4 +34,40 @@ mod moved_tests { .count() ); } + + #[cfg(feature = "sqlite")] + #[test] + fn sqlite_read_pool_metrics_render() { + use rivetkit_sqlite::vfs::SqliteVfsMetrics; + + let metrics = ActorMetrics::new("actor-1", "test"); + metrics.set_read_pool_active_readers(2); + metrics.set_read_pool_idle_readers(1); + metrics.observe_read_pool_read_wait(std::time::Duration::from_millis(3)); + metrics.observe_read_pool_write_wait(std::time::Duration::from_millis(5)); + metrics.record_read_pool_routed_read_query(); + metrics.record_read_pool_write_fallback_query(); + metrics.observe_read_pool_manual_transaction(std::time::Duration::from_millis(7)); + metrics.record_read_pool_reader_open(); + metrics.record_read_pool_reader_close(1); + metrics.record_read_pool_rejected_reader_mutation(); + metrics.record_read_pool_mode_transition("read", "write"); + + let output = metrics.render().expect("metrics should render"); + for name in [ + "sqlite_read_pool_active_readers", + "sqlite_read_pool_idle_readers", + "sqlite_read_pool_read_wait_duration_seconds", + "sqlite_read_pool_write_wait_duration_seconds", + "sqlite_read_pool_routed_read_queries_total", + "sqlite_read_pool_write_fallback_queries_total", + "sqlite_read_pool_manual_transaction_duration_seconds", + "sqlite_read_pool_reader_opens_total", + "sqlite_read_pool_reader_closes_total", + "sqlite_read_pool_rejected_reader_mutations_total", + "sqlite_read_pool_mode_transitions_total", + ] { + assert!(output.contains(name), "missing metric {name}"); + } + } } diff --git a/rivetkit-rust/packages/rivetkit-sqlite/src/connection_manager.rs b/rivetkit-rust/packages/rivetkit-sqlite/src/connection_manager.rs new file mode 100644 index 0000000000..cc28feb1c3 --- /dev/null +++ b/rivetkit-rust/packages/rivetkit-sqlite/src/connection_manager.rs @@ -0,0 +1,675 @@ +use std::{ + sync::Arc, + time::{Duration, Instant}, +}; + +use anyhow::{Result, anyhow}; +use libsqlite3_sys::{ + SQLITE_OPEN_CREATE, SQLITE_OPEN_READONLY, SQLITE_OPEN_READWRITE, sqlite3, + sqlite3_get_autocommit, +}; +use tokio::sync::{Mutex, Notify}; + +use crate::{ + optimization_flags::SqliteOptimizationFlags, + vfs::{NativeConnection, NativeVfsHandle, SqliteVfsMetrics, open_connection}, +}; + +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct NativeConnectionManagerConfig { + pub read_pool_enabled: bool, + pub max_readers: usize, + pub idle_ttl: Duration, +} + +impl Default for NativeConnectionManagerConfig { + fn default() -> Self { + Self::from_optimization_flags(SqliteOptimizationFlags::default()) + } +} + +impl NativeConnectionManagerConfig { + pub fn from_optimization_flags(flags: SqliteOptimizationFlags) -> Self { + Self { + read_pool_enabled: flags.sqlite_read_pool_enabled, + max_readers: flags.sqlite_read_pool_max_readers, + idle_ttl: Duration::from_millis(flags.sqlite_read_pool_idle_ttl_ms), + } + } +} + +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum NativeConnectionManagerMode { + Closed, + ReadMode, + WriteMode, + Closing, +} + +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct NativeConnectionManagerSnapshot { + pub mode: NativeConnectionManagerMode, + pub active_readers: usize, + pub idle_readers: usize, + pub open_readers: usize, + pub pending_writers: usize, + pub active_writer: bool, +} + +#[derive(Clone)] +pub struct NativeConnectionManager { + inner: std::sync::Arc, +} + +struct NativeConnectionManagerInner { + file_name: String, + config: NativeConnectionManagerConfig, + metrics: Option>, + state: Mutex, + changed: Notify, +} + +struct NativeConnectionManagerState { + vfs: Option, + mode: NativeConnectionManagerMode, + idle_readers: Vec, + idle_writer: Option, + active_readers: usize, + open_readers: usize, + pending_writers: usize, + active_writer: bool, + manual_transaction_started_at: Option, +} + +struct IdleReadConnection { + connection: NativeConnection, + idle_since: Instant, +} + +#[must_use = "release the read connection lease when work is complete"] +pub struct NativeReadConnectionLease { + manager: NativeConnectionManager, + connection: Option, + newly_opened: bool, +} + +#[must_use = "release the write connection lease when work is complete"] +pub struct NativeWriteConnectionLease { + manager: NativeConnectionManager, + connection: Option, + newly_opened: bool, +} + +impl NativeConnectionManager { + pub fn new( + vfs: NativeVfsHandle, + file_name: impl Into, + config: NativeConnectionManagerConfig, + ) -> Self { + Self::new_with_metrics(vfs, file_name, config, None) + } + + pub fn new_with_metrics( + vfs: NativeVfsHandle, + file_name: impl Into, + config: NativeConnectionManagerConfig, + metrics: Option>, + ) -> Self { + Self { + inner: std::sync::Arc::new(NativeConnectionManagerInner { + file_name: file_name.into(), + config, + metrics, + state: Mutex::new(NativeConnectionManagerState { + vfs: Some(vfs), + mode: NativeConnectionManagerMode::Closed, + idle_readers: Vec::new(), + idle_writer: None, + active_readers: 0, + open_readers: 0, + pending_writers: 0, + active_writer: false, + manual_transaction_started_at: None, + }), + changed: Notify::new(), + }), + } + } + + pub fn read_pool_enabled(&self) -> bool { + self.inner.config.read_pool_enabled + } + + pub async fn write_mode_active(&self) -> bool { + let state = self.inner.state.lock().await; + state.active_writer || state.idle_writer.is_some() + } + + pub async fn acquire_read(&self) -> Result { + if !self.inner.config.read_pool_enabled { + return Err(anyhow!("sqlite read connection pool is disabled")); + } + if self.inner.config.max_readers == 0 { + return Err(anyhow!("sqlite read connection manager has no reader slots")); + } + + let wait_started_at = Instant::now(); + loop { + let notified = self.inner.changed.notified(); + let open_result = { + let mut state = self.inner.state.lock().await; + let closed_readers = state.prune_expired_readers(self.inner.config.idle_ttl); + self.record_reader_closes(closed_readers); + self.record_reader_gauges(&state); + if state.vfs.is_none() { + return Err(anyhow!("sqlite connection manager is closed")); + } + if matches!(state.mode, NativeConnectionManagerMode::Closing) { + return Err(anyhow!("sqlite connection manager is closing")); + } + if state.pending_writers > 0 + || matches!(state.mode, NativeConnectionManagerMode::WriteMode) + || state.active_writer + { + None + } else if let Some(connection) = state.idle_readers.pop() { + state.active_readers += 1; + self.record_mode_transition(state.refresh_mode()); + self.record_reader_gauges(&state); + self.observe_read_wait(wait_started_at.elapsed()); + return Ok(NativeReadConnectionLease { + manager: self.clone(), + connection: Some(connection.connection), + newly_opened: false, + }); + } else if state.open_readers < self.inner.config.max_readers { + state.active_readers += 1; + state.open_readers += 1; + self.record_mode_transition(state.set_mode(NativeConnectionManagerMode::ReadMode)); + self.record_reader_gauges(&state); + Some( + state + .vfs + .as_ref() + .expect("vfs checked above") + .clone(), + ) + } else { + None + } + }; + + if let Some(vfs) = open_result { + let file_name = self.inner.file_name.clone(); + match tokio::task::spawn_blocking(move || { + open_connection(vfs, &file_name, SQLITE_OPEN_READONLY) + }) + .await? + { + Ok(connection) => { + self.record_reader_open(); + self.observe_read_wait(wait_started_at.elapsed()); + return Ok(NativeReadConnectionLease { + manager: self.clone(), + connection: Some(connection), + newly_opened: true, + }); + } + Err(err) => { + let mut state = self.inner.state.lock().await; + state.active_readers = state.active_readers.saturating_sub(1); + state.open_readers = state.open_readers.saturating_sub(1); + self.record_mode_transition(state.refresh_mode()); + self.record_reader_gauges(&state); + self.inner.changed.notify_waiters(); + return Err(anyhow!("failed to open sqlite read connection: {err}")); + } + } + } + + notified.await; + } + } + + pub async fn acquire_write(&self) -> Result { + let mut pending_registered = false; + let wait_started_at = Instant::now(); + + loop { + let notified = self.inner.changed.notified(); + let open_result = { + let mut state = self.inner.state.lock().await; + if !pending_registered { + state.pending_writers += 1; + pending_registered = true; + self.inner.changed.notify_waiters(); + } + if state.vfs.is_none() { + state.pending_writers = state.pending_writers.saturating_sub(1); + return Err(anyhow!("sqlite connection manager is closed")); + } + if matches!(state.mode, NativeConnectionManagerMode::Closing) { + state.pending_writers = state.pending_writers.saturating_sub(1); + self.inner.changed.notify_waiters(); + return Err(anyhow!("sqlite connection manager is closing")); + } + if state.active_readers == 0 && !state.active_writer { + let idle_readers = std::mem::take(&mut state.idle_readers); + state.open_readers = state.open_readers.saturating_sub(idle_readers.len()); + state.pending_writers = state.pending_writers.saturating_sub(1); + state.active_writer = true; + self.record_reader_closes(idle_readers.len()); + self.record_mode_transition(state.set_mode(NativeConnectionManagerMode::WriteMode)); + self.record_reader_gauges(&state); + if let Some(connection) = state.idle_writer.take() { + self.observe_write_wait(wait_started_at.elapsed()); + return Ok(NativeWriteConnectionLease { + manager: self.clone(), + connection: Some(connection), + newly_opened: false, + }); + } + Some(( + state + .vfs + .as_ref() + .expect("vfs checked above") + .clone(), + idle_readers, + )) + } else { + None + } + }; + + if let Some((vfs, idle_readers)) = open_result { + drop(idle_readers); + let file_name = self.inner.file_name.clone(); + match tokio::task::spawn_blocking(move || { + open_connection( + vfs, + &file_name, + SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, + ) + }) + .await? + { + Ok(connection) => { + self.observe_write_wait(wait_started_at.elapsed()); + return Ok(NativeWriteConnectionLease { + manager: self.clone(), + connection: Some(connection), + newly_opened: true, + }); + } + Err(err) => { + let mut state = self.inner.state.lock().await; + state.active_writer = false; + self.record_mode_transition(state.refresh_mode()); + self.inner.changed.notify_waiters(); + return Err(anyhow!("failed to open sqlite write connection: {err}")); + } + } + } + + notified.await; + } + } + + pub async fn with_read_connection( + &self, + f: F, + ) -> Result + where + T: Send + 'static, + F: FnOnce(*mut sqlite3) -> Result + Send + 'static, + { + self.with_read_connection_state(move |db, _newly_opened| f(db)) + .await + } + + pub async fn with_read_connection_state( + &self, + f: F, + ) -> Result + where + T: Send + 'static, + F: FnOnce(*mut sqlite3, bool) -> Result + Send + 'static, + { + let mut lease = self.acquire_read().await?; + let newly_opened = lease.newly_opened; + let connection = lease + .connection + .take() + .expect("read connection lease should hold a connection"); + let (connection, result) = + tokio::task::spawn_blocking(move || { + let result = f(connection.as_ptr(), newly_opened); + (connection, result) + }) + .await?; + lease.connection = Some(connection); + lease.release().await; + result + } + + pub async fn with_write_connection( + &self, + f: F, + ) -> Result + where + T: Send + 'static, + F: FnOnce(*mut sqlite3) -> Result + Send + 'static, + { + self.with_write_connection_state(move |db, _newly_opened| f(db)) + .await + } + + pub async fn with_write_connection_state( + &self, + f: F, + ) -> Result + where + T: Send + 'static, + F: FnOnce(*mut sqlite3, bool) -> Result + Send + 'static, + { + let mut lease = self.acquire_write().await?; + let newly_opened = lease.newly_opened; + let connection = lease + .connection + .take() + .expect("write connection lease should hold a connection"); + let (connection, result) = + tokio::task::spawn_blocking(move || { + let result = f(connection.as_ptr(), newly_opened); + (connection, result) + }) + .await?; + lease.connection = Some(connection); + lease.release().await; + result + } + + pub async fn close(&self) -> Result<()> { + let idle_readers = { + let mut state = self.inner.state.lock().await; + if state.vfs.is_none() { + return Ok(()); + } + state.mode = NativeConnectionManagerMode::Closing; + state.open_readers = state.open_readers.saturating_sub(state.idle_readers.len()); + self.inner.changed.notify_waiters(); + state.idle_writer.take(); + self.record_reader_closes(state.idle_readers.len()); + self.record_reader_gauges(&state); + std::mem::take(&mut state.idle_readers) + }; + drop(idle_readers); + + loop { + let notified = self.inner.changed.notified(); + let vfs = { + let mut state = self.inner.state.lock().await; + if state.active_readers == 0 && !state.active_writer { + self.record_mode_transition(state.set_mode(NativeConnectionManagerMode::Closed)); + state.vfs.take() + } else { + None + } + }; + + if let Some(vfs) = vfs { + drop(vfs); + self.inner.changed.notify_waiters(); + return Ok(()); + } + + notified.await; + } + } + + pub async fn snapshot(&self) -> NativeConnectionManagerSnapshot { + let state = self.inner.state.lock().await; + state.snapshot() + } + + #[cfg(test)] + pub(crate) async fn wait_for_snapshot( + &self, + predicate: impl Fn(&NativeConnectionManagerSnapshot) -> bool, + ) -> NativeConnectionManagerSnapshot { + loop { + let notified = self.inner.changed.notified(); + let snapshot = self.snapshot().await; + if predicate(&snapshot) { + return snapshot; + } + notified.await; + } + } + + fn record_reader_gauges(&self, state: &NativeConnectionManagerState) { + if let Some(metrics) = &self.inner.metrics { + metrics.set_read_pool_active_readers(state.active_readers as u64); + metrics.set_read_pool_idle_readers(state.idle_readers.len() as u64); + } + } + + fn record_reader_open(&self) { + if let Some(metrics) = &self.inner.metrics { + metrics.record_read_pool_reader_open(); + } + } + + fn record_reader_closes(&self, count: usize) { + if count == 0 { + return; + } + if let Some(metrics) = &self.inner.metrics { + metrics.record_read_pool_reader_close(count as u64); + } + } + + fn observe_read_wait(&self, duration: Duration) { + if let Some(metrics) = &self.inner.metrics { + metrics.observe_read_pool_read_wait(duration); + } + } + + fn observe_write_wait(&self, duration: Duration) { + if let Some(metrics) = &self.inner.metrics { + metrics.observe_read_pool_write_wait(duration); + } + } + + fn record_mode_transition( + &self, + transition: Option<(NativeConnectionManagerMode, NativeConnectionManagerMode)>, + ) { + let Some((from, to)) = transition else { + return; + }; + if let Some(metrics) = &self.inner.metrics { + metrics.record_read_pool_mode_transition(from.as_metric_label(), to.as_metric_label()); + } + } + + fn observe_manual_transaction(&self, duration: Duration) { + if let Some(metrics) = &self.inner.metrics { + metrics.observe_read_pool_manual_transaction(duration); + } + } +} + +impl NativeReadConnectionLease { + pub fn as_ptr(&self) -> *mut sqlite3 { + self.connection + .as_ref() + .expect("read connection lease should hold a connection") + .as_ptr() + } + + pub async fn release(mut self) { + let Some(connection) = self.connection.take() else { + return; + }; + let idle_connection = { + let mut state = self.manager.inner.state.lock().await; + state.active_readers = state.active_readers.saturating_sub(1); + if state.vfs.is_some() + && state.pending_writers == 0 + && !matches!(state.mode, NativeConnectionManagerMode::Closing) + { + state.idle_readers.push(IdleReadConnection { + connection, + idle_since: Instant::now(), + }); + self.manager.record_mode_transition(state.refresh_mode()); + self.manager.record_reader_gauges(&state); + None + } else { + state.open_readers = state.open_readers.saturating_sub(1); + self.manager.record_mode_transition(state.refresh_mode()); + self.manager.record_reader_gauges(&state); + Some(connection) + } + }; + if idle_connection.is_some() { + self.manager.record_reader_closes(1); + } + drop(idle_connection); + self.manager.inner.changed.notify_waiters(); + } +} + +impl Drop for NativeReadConnectionLease { + fn drop(&mut self) { + if self.connection.is_some() { + tracing::warn!("sqlite read connection lease dropped without release"); + } + } +} + +impl NativeWriteConnectionLease { + pub fn as_ptr(&self) -> *mut sqlite3 { + self.connection + .as_ref() + .expect("write connection lease should hold a connection") + .as_ptr() + } + + pub fn newly_opened(&self) -> bool { + self.newly_opened + } + + pub async fn release(mut self) { + let connection = self.connection.take(); + let keep_writer_open = connection + .as_ref() + .is_some_and(|connection| { + !self.manager.inner.config.read_pool_enabled + || unsafe { sqlite3_get_autocommit(connection.as_ptr()) == 0 } + }); + let close_connection = { + let mut state = self.manager.inner.state.lock().await; + state.active_writer = false; + if keep_writer_open + && state.vfs.is_some() + && !matches!(state.mode, NativeConnectionManagerMode::Closing) + { + if state.manual_transaction_started_at.is_none() + && connection + .as_ref() + .is_some_and(|connection| unsafe { + sqlite3_get_autocommit(connection.as_ptr()) == 0 + }) + { + state.manual_transaction_started_at = Some(Instant::now()); + } + state.idle_writer = connection; + self.manager.record_mode_transition( + state.set_mode(NativeConnectionManagerMode::WriteMode), + ); + None + } else { + if let Some(started_at) = state.manual_transaction_started_at.take() { + self.manager.observe_manual_transaction(started_at.elapsed()); + } + self.manager.record_mode_transition(state.refresh_mode()); + connection + } + }; + drop(close_connection); + self.manager.inner.changed.notify_waiters(); + } +} + +impl Drop for NativeWriteConnectionLease { + fn drop(&mut self) { + if self.connection.is_some() { + tracing::warn!("sqlite write connection lease dropped without release"); + } + } +} + +impl NativeConnectionManagerState { + fn set_mode( + &mut self, + mode: NativeConnectionManagerMode, + ) -> Option<(NativeConnectionManagerMode, NativeConnectionManagerMode)> { + let previous = self.mode; + self.mode = mode; + (previous != mode).then_some((previous, mode)) + } + + fn refresh_mode(&mut self) -> Option<(NativeConnectionManagerMode, NativeConnectionManagerMode)> { + if matches!(self.mode, NativeConnectionManagerMode::Closing) { + return None; + } + let mode = if self.active_writer { + NativeConnectionManagerMode::WriteMode + } else if self.idle_writer.is_some() { + NativeConnectionManagerMode::WriteMode + } else if self.active_readers > 0 || self.open_readers > 0 { + NativeConnectionManagerMode::ReadMode + } else { + NativeConnectionManagerMode::Closed + }; + self.set_mode(mode) + } + + fn snapshot(&self) -> NativeConnectionManagerSnapshot { + NativeConnectionManagerSnapshot { + mode: self.mode, + active_readers: self.active_readers, + idle_readers: self.idle_readers.len(), + open_readers: self.open_readers, + pending_writers: self.pending_writers, + active_writer: self.active_writer, + } + } + + fn prune_expired_readers(&mut self, idle_ttl: Duration) -> usize { + let now = Instant::now(); + let before = self.idle_readers.len(); + self.idle_readers + .retain(|reader| now.duration_since(reader.idle_since) < idle_ttl); + let closed = before - self.idle_readers.len(); + self.open_readers = self.open_readers.saturating_sub(closed); + if closed > 0 { + self.refresh_mode(); + } + closed + } +} + +impl NativeConnectionManagerMode { + fn as_metric_label(self) -> &'static str { + match self { + Self::Closed => "closed", + Self::ReadMode => "read", + Self::WriteMode => "write", + Self::Closing => "closing", + } + } +} diff --git a/rivetkit-rust/packages/rivetkit-sqlite/src/database.rs b/rivetkit-rust/packages/rivetkit-sqlite/src/database.rs index dfe23f98b0..66ecaae91f 100644 --- a/rivetkit-rust/packages/rivetkit-sqlite/src/database.rs +++ b/rivetkit-rust/packages/rivetkit-sqlite/src/database.rs @@ -5,11 +5,37 @@ use rivet_envoy_client::handle::EnvoyHandle; use rivet_envoy_protocol as protocol; use tokio::runtime::Handle; -use crate::vfs::{NativeDatabase, SqliteVfs, SqliteVfsMetrics, VfsConfig}; +use crate::{ + connection_manager::{NativeConnectionManager, NativeConnectionManagerConfig}, + optimization_flags::sqlite_optimization_flags, + query::{ + BindParam, ExecResult, ExecuteResult, ExecuteRoute, QueryResult, classify_statement, + exec_statements, execute_single_statement, install_reader_authorizer, + }, + vfs::{ + NativeVfsHandle, SqliteVfs, SqliteVfsMetrics, VfsConfig, VfsPreloadHintSnapshot, + configure_connection_for_database, verify_batch_atomic_writes, + }, +}; -pub type NativeDatabaseHandle = NativeDatabase; +enum ReadQueryRoute { + Read(ExecuteResult), + WriteRequired(ExecuteRoute), +} + +#[derive(Clone)] +pub struct NativeDatabaseHandle { + file_name: String, + vfs: NativeVfsHandle, + manager: NativeConnectionManager, + metrics: Option>, +} + +pub fn vfs_name_for_actor_database(actor_id: &str, generation: u64) -> String { + format!("envoy-sqlite-{actor_id}-g{generation}") +} -pub fn open_database_from_envoy( +pub async fn open_database_from_envoy( handle: EnvoyHandle, actor_id: String, startup_data: Option, @@ -18,18 +44,271 @@ pub fn open_database_from_envoy( ) -> Result { let startup = startup_data.ok_or_else(|| anyhow!("missing sqlite startup data for actor {actor_id}"))?; - let vfs_name = format!("envoy-sqlite-{actor_id}"); + let vfs_name = vfs_name_for_actor_database(&actor_id, startup.generation); let vfs = SqliteVfs::register( &vfs_name, handle, actor_id.clone(), rt_handle, - startup, - VfsConfig::default(), - metrics, - ) + startup, + VfsConfig::default(), + metrics.clone(), + ) .map_err(|e| anyhow!("failed to register sqlite VFS: {e}"))?; - crate::vfs::open_database(vfs, &actor_id) - .map_err(|e| anyhow!("failed to open sqlite database: {e}")) + let native_db = NativeDatabaseHandle::new_with_metrics( + vfs, + actor_id, + NativeConnectionManagerConfig::from_optimization_flags(*sqlite_optimization_flags()), + metrics, + ); + native_db.initialize().await?; + Ok(native_db) +} + +impl NativeDatabaseHandle { + pub fn new( + vfs: NativeVfsHandle, + file_name: String, + config: NativeConnectionManagerConfig, + ) -> Self { + Self::new_with_metrics(vfs, file_name, config, None) + } + + pub fn new_with_metrics( + vfs: NativeVfsHandle, + file_name: String, + config: NativeConnectionManagerConfig, + metrics: Option>, + ) -> Self { + Self { + file_name: file_name.clone(), + manager: NativeConnectionManager::new_with_metrics( + vfs.clone(), + file_name, + config, + metrics.clone(), + ), + vfs, + metrics, + } + } + + pub async fn exec(&self, sql: String) -> Result { + self.with_configured_write_connection(move |db| exec_statements(db, &sql)) + .await + } + + pub async fn query(&self, sql: String, params: Option>) -> Result { + self.execute(sql, params).await.map(|result| QueryResult { + columns: result.columns, + rows: result.rows, + }) + } + + pub async fn run(&self, sql: String, params: Option>) -> Result { + self.execute(sql, params).await.map(|result| ExecResult { + changes: result.changes, + }) + } + + pub async fn execute( + &self, + sql: String, + params: Option>, + ) -> Result { + if !self.manager.read_pool_enabled() { + return self.execute_without_read_pool(sql, params).await; + } + if self.manager.write_mode_active().await { + return self.execute_on_writer_with_classification(sql, params).await; + } + + let read_sql = sql.clone(); + let read_params = params.clone(); + let route = match self.try_read_execute(read_sql, read_params).await? { + ReadQueryRoute::Read(result) => { + if let Some(metrics) = &self.metrics { + metrics.record_read_pool_routed_read_query(); + } + return Ok(result); + } + ReadQueryRoute::WriteRequired(route) => route, + }; + if matches!(route, ExecuteRoute::WriteFallback) { + if let Some(metrics) = &self.metrics { + metrics.record_read_pool_write_fallback_query(); + } + } + + self.with_configured_write_connection(move |db| { + execute_single_statement(db, &sql, params.as_deref(), route) + }) + .await + } + + pub async fn execute_write( + &self, + sql: String, + params: Option>, + ) -> Result { + self.with_configured_write_connection(move |db| { + execute_single_statement(db, &sql, params.as_deref(), ExecuteRoute::Write) + }) + .await + } + + pub async fn close(&self) -> Result<()> { + self.manager.close().await + } + + pub fn take_last_kv_error(&self) -> Option { + self.vfs.take_last_error() + } + + pub fn snapshot_preload_hints(&self) -> VfsPreloadHintSnapshot { + self.vfs.snapshot_preload_hints() + } + + #[cfg(test)] + pub(crate) fn manager(&self) -> NativeConnectionManager { + self.manager.clone() + } + + async fn initialize(&self) -> Result<()> { + let vfs = self.vfs.clone(); + let file_name = self.file_name.clone(); + self.manager + .with_write_connection_state(move |db, newly_opened| { + if newly_opened { + configure_connection_for_database(db, &vfs, &file_name) + .map_err(anyhow::Error::msg)?; + } + verify_batch_atomic_writes(db, &vfs, &file_name).map_err(anyhow::Error::msg) + }) + .await + } + + async fn with_configured_write_connection(&self, f: F) -> Result + where + T: Send + 'static, + F: FnOnce(*mut libsqlite3_sys::sqlite3) -> Result + Send + 'static, + { + let vfs = self.vfs.clone(); + let file_name = self.file_name.clone(); + self.manager + .with_write_connection_state(move |db, newly_opened| { + if newly_opened { + configure_connection_for_database(db, &vfs, &file_name) + .map_err(anyhow::Error::msg)?; + } + f(db) + }) + .await + } + + async fn execute_without_read_pool( + &self, + sql: String, + params: Option>, + ) -> Result { + self.execute_on_writer_with_classification(sql, params).await + } + + async fn execute_on_writer_with_classification( + &self, + sql: String, + params: Option>, + ) -> Result { + let metrics = self.metrics.clone(); + self.with_configured_write_connection(move |db| { + let route = classify_statement(db, &sql) + .map(|classification| write_route_for_classification(&classification)) + .unwrap_or(ExecuteRoute::WriteFallback); + if matches!(route, ExecuteRoute::WriteFallback) { + if let Some(metrics) = &metrics { + metrics.record_read_pool_write_fallback_query(); + } + } + execute_single_statement(db, &sql, params.as_deref(), route) + }) + .await + } + + async fn try_read_execute( + &self, + sql: String, + params: Option>, + ) -> Result { + let metrics = self.metrics.clone(); + self.manager + .with_read_connection_state(move |db, newly_opened| { + if newly_opened { + configure_reader_connection(db)?; + } + + let classification = match classify_statement(db, &sql) { + Ok(classification) => classification, + Err(_) => { + return Ok(ReadQueryRoute::WriteRequired(ExecuteRoute::WriteFallback)); + } + }; + if !classification.reader_eligible() { + return Ok(ReadQueryRoute::WriteRequired(write_route_for_classification( + &classification, + ))); + } + + install_reader_authorizer(db)?; + match execute_single_statement(db, &sql, params.as_deref(), ExecuteRoute::Read) { + Ok(result) => Ok(ReadQueryRoute::Read(result)), + Err(error) => { + if reader_rejection_error(&error) { + if let Some(metrics) = &metrics { + metrics.record_read_pool_rejected_reader_mutation(); + } + return Err(error); + } + Err(error) + } + } + }) + .await + } +} + +fn reader_rejection_error(error: &anyhow::Error) -> bool { + let message = error.to_string().to_ascii_lowercase(); + message.contains("not authorized") + || message.contains("readonly") + || message.contains("read-only") + || message.contains("attempt to write") +} + +fn write_route_for_classification( + classification: &crate::query::StatementClassification, +) -> ExecuteRoute { + if !classification.sqlite_readonly || classification.authorizer.requires_write_route() { + ExecuteRoute::Write + } else { + ExecuteRoute::WriteFallback + } +} + +fn configure_reader_connection(db: *mut libsqlite3_sys::sqlite3) -> Result<()> { + exec_statements(db, "PRAGMA query_only = ON;")?; + Ok(()) +} + +#[cfg(test)] +mod tests { + use super::vfs_name_for_actor_database; + + #[test] + fn vfs_name_includes_actor_and_generation() { + assert_eq!( + vfs_name_for_actor_database("actor-123", 42), + "envoy-sqlite-actor-123-g42" + ); + } } diff --git a/rivetkit-rust/packages/rivetkit-sqlite/src/lib.rs b/rivetkit-rust/packages/rivetkit-sqlite/src/lib.rs index 880e99bd04..73bfda64ad 100644 --- a/rivetkit-rust/packages/rivetkit-sqlite/src/lib.rs +++ b/rivetkit-rust/packages/rivetkit-sqlite/src/lib.rs @@ -14,6 +14,9 @@ //! - Delete and truncate behavior //! - Journal and BATCH_ATOMIC behavior +/// Native SQLite read-mode/write-mode connection manager. +pub mod connection_manager; + /// Unified native database handles and open helpers. pub mod database; diff --git a/rivetkit-rust/packages/rivetkit-sqlite/src/query.rs b/rivetkit-rust/packages/rivetkit-sqlite/src/query.rs index ba1a34adcb..177a4d9d68 100644 --- a/rivetkit-rust/packages/rivetkit-sqlite/src/query.rs +++ b/rivetkit-rust/packages/rivetkit-sqlite/src/query.rs @@ -1,14 +1,24 @@ -use std::ffi::{CStr, CString, c_char}; +use std::ffi::{CStr, CString}; +use std::os::raw::{c_char, c_int, c_void}; use std::ptr; use anyhow::{Result, anyhow}; use libsqlite3_sys::{ - SQLITE_BLOB, SQLITE_DONE, SQLITE_FLOAT, SQLITE_INTEGER, SQLITE_NULL, SQLITE_OK, SQLITE_ROW, - SQLITE_TEXT, SQLITE_TRANSIENT, sqlite3, sqlite3_bind_blob, sqlite3_bind_double, - sqlite3_bind_int64, sqlite3_bind_null, sqlite3_bind_text, sqlite3_changes, sqlite3_column_blob, - sqlite3_column_bytes, sqlite3_column_count, sqlite3_column_double, sqlite3_column_int64, - sqlite3_column_name, sqlite3_column_text, sqlite3_column_type, sqlite3_errmsg, - sqlite3_finalize, sqlite3_prepare_v2, sqlite3_step, + SQLITE_ALTER_TABLE, SQLITE_ANALYZE, SQLITE_ATTACH, SQLITE_BLOB, SQLITE_CREATE_INDEX, + SQLITE_CREATE_TABLE, SQLITE_CREATE_TEMP_INDEX, SQLITE_CREATE_TEMP_TABLE, + SQLITE_CREATE_TEMP_TRIGGER, SQLITE_CREATE_TEMP_VIEW, SQLITE_CREATE_TRIGGER, + SQLITE_CREATE_VIEW, SQLITE_CREATE_VTABLE, SQLITE_DELETE, SQLITE_DENY, SQLITE_DETACH, + SQLITE_DONE, SQLITE_DROP_INDEX, SQLITE_DROP_TABLE, SQLITE_DROP_TEMP_INDEX, + SQLITE_DROP_TEMP_TABLE, SQLITE_DROP_TEMP_TRIGGER, SQLITE_DROP_TEMP_VIEW, + SQLITE_DROP_TRIGGER, SQLITE_DROP_VIEW, SQLITE_DROP_VTABLE, SQLITE_FLOAT, SQLITE_FUNCTION, + SQLITE_INSERT, SQLITE_INTEGER, SQLITE_NULL, SQLITE_OK, SQLITE_PRAGMA, SQLITE_READ, + SQLITE_REINDEX, SQLITE_ROW, SQLITE_SAVEPOINT, SQLITE_SELECT, SQLITE_TEXT, + SQLITE_TRANSACTION, SQLITE_TRANSIENT, SQLITE_UPDATE, sqlite3, sqlite3_bind_blob, + sqlite3_bind_double, sqlite3_bind_int64, sqlite3_bind_null, sqlite3_bind_text, + sqlite3_changes, sqlite3_column_blob, sqlite3_column_bytes, sqlite3_column_count, + sqlite3_column_double, sqlite3_column_int64, sqlite3_column_name, sqlite3_column_text, + sqlite3_column_type, sqlite3_errmsg, sqlite3_finalize, sqlite3_last_insert_rowid, + sqlite3_prepare_v2, sqlite3_set_authorizer, sqlite3_step, sqlite3_stmt_readonly, }; #[derive(Clone, Debug, PartialEq)] @@ -31,6 +41,22 @@ pub struct QueryResult { pub rows: Vec>, } +#[derive(Clone, Copy, Debug, PartialEq, Eq)] +pub enum ExecuteRoute { + Read, + Write, + WriteFallback, +} + +#[derive(Clone, Debug, PartialEq)] +pub struct ExecuteResult { + pub columns: Vec, + pub rows: Vec>, + pub changes: i64, + pub last_insert_row_id: Option, + pub route: ExecuteRoute, +} + #[derive(Clone, Debug, PartialEq)] pub enum ColumnValue { Null, @@ -40,6 +66,245 @@ pub enum ColumnValue { Blob(Vec), } +#[derive(Clone, Debug, PartialEq, Eq)] +pub struct StatementClassification { + pub has_statement: bool, + pub sqlite_readonly: bool, + pub has_trailing_sql: bool, + pub authorizer: StatementAuthorizerSummary, +} + +impl StatementClassification { + pub fn reader_eligible(&self) -> bool { + self.has_statement + && self.sqlite_readonly + && !self.has_trailing_sql + && !self.authorizer.requires_write_route() + } +} + +#[derive(Clone, Debug, Default, PartialEq, Eq)] +pub struct StatementAuthorizerSummary { + pub transaction_control: bool, + pub attach: bool, + pub detach: bool, + pub schema_writes: bool, + pub temp_writes: bool, + pub pragma_usage: bool, + pub function_calls: bool, + pub write_operations: bool, + pub actions: Vec, +} + +impl StatementAuthorizerSummary { + pub fn requires_write_route(&self) -> bool { + self.transaction_control + || self.attach + || self.detach + || self.schema_writes + || self.temp_writes + || self.write_operations + } +} + +#[derive(Clone, Debug, PartialEq, Eq)] +pub struct StatementAuthorizerAction { + pub kind: StatementAuthorizerActionKind, + pub first_arg: Option, + pub second_arg: Option, + pub database_name: Option, + pub trigger_or_view_name: Option, +} + +#[derive(Clone, Debug, PartialEq, Eq)] +pub enum StatementAuthorizerActionKind { + Read, + Select, + Transaction, + Savepoint, + Attach, + Detach, + Pragma, + Function, + Insert, + Update, + Delete, + CreateIndex, + CreateTable, + CreateTrigger, + CreateView, + CreateVirtualTable, + CreateTempIndex, + CreateTempTable, + CreateTempTrigger, + CreateTempView, + DropIndex, + DropTable, + DropTrigger, + DropView, + DropVirtualTable, + DropTempIndex, + DropTempTable, + DropTempTrigger, + DropTempView, + AlterTable, + Reindex, + Analyze, + Other(i32), +} + +impl StatementAuthorizerActionKind { + fn from_code(code: c_int) -> Self { + match code { + SQLITE_READ => Self::Read, + SQLITE_SELECT => Self::Select, + SQLITE_TRANSACTION => Self::Transaction, + SQLITE_SAVEPOINT => Self::Savepoint, + SQLITE_ATTACH => Self::Attach, + SQLITE_DETACH => Self::Detach, + SQLITE_PRAGMA => Self::Pragma, + SQLITE_FUNCTION => Self::Function, + SQLITE_INSERT => Self::Insert, + SQLITE_UPDATE => Self::Update, + SQLITE_DELETE => Self::Delete, + SQLITE_CREATE_INDEX => Self::CreateIndex, + SQLITE_CREATE_TABLE => Self::CreateTable, + SQLITE_CREATE_TRIGGER => Self::CreateTrigger, + SQLITE_CREATE_VIEW => Self::CreateView, + SQLITE_CREATE_VTABLE => Self::CreateVirtualTable, + SQLITE_CREATE_TEMP_INDEX => Self::CreateTempIndex, + SQLITE_CREATE_TEMP_TABLE => Self::CreateTempTable, + SQLITE_CREATE_TEMP_TRIGGER => Self::CreateTempTrigger, + SQLITE_CREATE_TEMP_VIEW => Self::CreateTempView, + SQLITE_DROP_INDEX => Self::DropIndex, + SQLITE_DROP_TABLE => Self::DropTable, + SQLITE_DROP_TRIGGER => Self::DropTrigger, + SQLITE_DROP_VIEW => Self::DropView, + SQLITE_DROP_VTABLE => Self::DropVirtualTable, + SQLITE_DROP_TEMP_INDEX => Self::DropTempIndex, + SQLITE_DROP_TEMP_TABLE => Self::DropTempTable, + SQLITE_DROP_TEMP_TRIGGER => Self::DropTempTrigger, + SQLITE_DROP_TEMP_VIEW => Self::DropTempView, + SQLITE_ALTER_TABLE => Self::AlterTable, + SQLITE_REINDEX => Self::Reindex, + SQLITE_ANALYZE => Self::Analyze, + _ => Self::Other(code), + } + } + + fn is_schema_write(&self) -> bool { + matches!( + self, + Self::CreateIndex + | Self::CreateTable + | Self::CreateTrigger + | Self::CreateView + | Self::CreateVirtualTable + | Self::DropIndex + | Self::DropTable + | Self::DropTrigger + | Self::DropView + | Self::DropVirtualTable + | Self::AlterTable + | Self::Reindex + | Self::Analyze + ) + } + + fn is_temp_schema_write(&self) -> bool { + matches!( + self, + Self::CreateTempIndex + | Self::CreateTempTable + | Self::CreateTempTrigger + | Self::CreateTempView + | Self::DropTempIndex + | Self::DropTempTable + | Self::DropTempTrigger + | Self::DropTempView + ) + } + + fn is_data_write(&self) -> bool { + matches!(self, Self::Insert | Self::Update | Self::Delete) + } +} + +pub fn classify_statement(db: *mut sqlite3, sql: &str) -> Result { + let c_sql = CString::new(sql).map_err(|err| anyhow!(err.to_string()))?; + let mut summary = StatementAuthorizerSummary::default(); + let rc = unsafe { + sqlite3_set_authorizer( + db, + Some(capture_authorizer_action), + &mut summary as *mut StatementAuthorizerSummary as *mut c_void, + ) + }; + if rc != SQLITE_OK { + return Err(sqlite_error(db, "failed to install sqlite authorizer")); + } + + let mut stmt = ptr::null_mut(); + let mut tail = ptr::null(); + let prepare_rc = unsafe { sqlite3_prepare_v2(db, c_sql.as_ptr(), -1, &mut stmt, &mut tail) }; + let prepare_error = if prepare_rc == SQLITE_OK { + None + } else { + Some(sqlite_error(db, "failed to prepare sqlite statement for classification")) + }; + + let restore_rc = unsafe { sqlite3_set_authorizer(db, None, ptr::null_mut()) }; + if restore_rc != SQLITE_OK { + if !stmt.is_null() { + unsafe { + sqlite3_finalize(stmt); + } + } + return Err(sqlite_error(db, "failed to clear sqlite authorizer")); + } + + if let Some(err) = prepare_error { + if !stmt.is_null() { + unsafe { + sqlite3_finalize(stmt); + } + } + return Err(err); + } + + if stmt.is_null() { + return Ok(StatementClassification { + has_statement: false, + sqlite_readonly: true, + has_trailing_sql: has_non_whitespace_tail(tail), + authorizer: summary, + }); + } + + let sqlite_readonly = unsafe { sqlite3_stmt_readonly(stmt) != 0 }; + unsafe { + sqlite3_finalize(stmt); + } + + Ok(StatementClassification { + has_statement: true, + sqlite_readonly, + has_trailing_sql: has_non_whitespace_tail(tail), + authorizer: summary, + }) +} + +pub fn install_reader_authorizer(db: *mut sqlite3) -> Result<()> { + let rc = unsafe { + sqlite3_set_authorizer(db, Some(reader_authorizer_action), ptr::null_mut()) + }; + if rc != SQLITE_OK { + return Err(sqlite_error(db, "failed to install sqlite reader authorizer")); + } + + Ok(()) +} + pub fn execute_statement( db: *mut sqlite3, sql: &str, @@ -134,6 +399,77 @@ pub fn query_statement( result } +pub fn execute_single_statement( + db: *mut sqlite3, + sql: &str, + params: Option<&[BindParam]>, + route: ExecuteRoute, +) -> Result { + let c_sql = CString::new(sql).map_err(|err| anyhow!(err.to_string()))?; + let mut stmt = ptr::null_mut(); + let mut tail = ptr::null(); + let rc = unsafe { sqlite3_prepare_v2(db, c_sql.as_ptr(), -1, &mut stmt, &mut tail) }; + if rc != SQLITE_OK { + return Err(sqlite_error(db, "failed to prepare sqlite execute statement")); + } + if has_non_whitespace_tail(tail) { + if !stmt.is_null() { + unsafe { + sqlite3_finalize(stmt); + } + } + return Err(anyhow!("sqlite execute only supports a single statement")); + } + if stmt.is_null() { + return Ok(ExecuteResult { + columns: Vec::new(), + rows: Vec::new(), + changes: 0, + last_insert_row_id: None, + route, + }); + } + + let result = (|| { + if let Some(params) = params { + bind_params(db, stmt, params)?; + } + + let columns = collect_columns(stmt); + let mut rows = Vec::new(); + loop { + let step_rc = unsafe { sqlite3_step(stmt) }; + if step_rc == SQLITE_DONE { + break; + } + if step_rc != SQLITE_ROW { + return Err(sqlite_error(db, "failed to step sqlite execute statement")); + } + + let mut row = Vec::with_capacity(columns.len()); + for index in 0..columns.len() { + row.push(column_value(stmt, index as i32)); + } + rows.push(row); + } + + let changes = unsafe { sqlite3_changes(db) as i64 }; + Ok(ExecuteResult { + columns, + rows, + changes, + last_insert_row_id: (changes > 0).then(|| unsafe { sqlite3_last_insert_rowid(db) }), + route, + }) + })(); + + unsafe { + sqlite3_finalize(stmt); + } + + result +} + pub fn exec_statements(db: *mut sqlite3, sql: &str) -> Result { let c_sql = CString::new(sql).map_err(|err| anyhow!(err.to_string()))?; let mut remaining = c_sql.as_ptr(); @@ -283,6 +619,193 @@ fn column_value(stmt: *mut libsqlite3_sys::sqlite3_stmt, index: i32) -> ColumnVa } } +unsafe extern "C" fn capture_authorizer_action( + user_data: *mut c_void, + action_code: c_int, + first_arg: *const c_char, + second_arg: *const c_char, + database_name: *const c_char, + trigger_or_view_name: *const c_char, +) -> c_int { + if user_data.is_null() { + return SQLITE_OK; + } + + let summary = unsafe { &mut *(user_data as *mut StatementAuthorizerSummary) }; + let kind = StatementAuthorizerActionKind::from_code(action_code); + let database_name = unsafe { optional_c_string(database_name) }; + + match kind { + StatementAuthorizerActionKind::Transaction + | StatementAuthorizerActionKind::Savepoint => summary.transaction_control = true, + StatementAuthorizerActionKind::Attach => summary.attach = true, + StatementAuthorizerActionKind::Detach => summary.detach = true, + StatementAuthorizerActionKind::Pragma => summary.pragma_usage = true, + StatementAuthorizerActionKind::Function => summary.function_calls = true, + _ => {} + } + + if kind.is_schema_write() { + summary.schema_writes = true; + } + if kind.is_temp_schema_write() + || (kind.is_data_write() && database_name.as_deref() == Some("temp")) + { + summary.temp_writes = true; + } + if kind.is_data_write() || kind.is_schema_write() || kind.is_temp_schema_write() { + summary.write_operations = true; + } + + summary.actions.push(StatementAuthorizerAction { + kind, + first_arg: unsafe { optional_c_string(first_arg) }, + second_arg: unsafe { optional_c_string(second_arg) }, + database_name, + trigger_or_view_name: unsafe { optional_c_string(trigger_or_view_name) }, + }); + + SQLITE_OK +} + +unsafe extern "C" fn reader_authorizer_action( + _user_data: *mut c_void, + action_code: c_int, + first_arg: *const c_char, + second_arg: *const c_char, + database_name: *const c_char, + _trigger_or_view_name: *const c_char, +) -> c_int { + let kind = StatementAuthorizerActionKind::from_code(action_code); + let database_name = unsafe { optional_c_string(database_name) }; + let first_arg = unsafe { optional_c_string(first_arg) }; + let second_arg = unsafe { optional_c_string(second_arg) }; + + if kind.is_data_write() + || kind.is_schema_write() + || kind.is_temp_schema_write() + || (kind.is_data_write() && database_name.as_deref() == Some("temp")) + { + return SQLITE_DENY; + } + + match kind { + StatementAuthorizerActionKind::Transaction + | StatementAuthorizerActionKind::Savepoint + | StatementAuthorizerActionKind::Attach + | StatementAuthorizerActionKind::Detach => SQLITE_DENY, + StatementAuthorizerActionKind::Pragma => { + if reader_pragma_allowed(first_arg.as_deref(), second_arg.as_deref()) { + SQLITE_OK + } else { + SQLITE_DENY + } + } + StatementAuthorizerActionKind::Function => { + if reader_function_allowed(first_arg.as_deref(), second_arg.as_deref()) { + SQLITE_OK + } else { + SQLITE_DENY + } + } + StatementAuthorizerActionKind::Read + | StatementAuthorizerActionKind::Select + | StatementAuthorizerActionKind::Other(_) => SQLITE_OK, + StatementAuthorizerActionKind::Insert + | StatementAuthorizerActionKind::Update + | StatementAuthorizerActionKind::Delete + | StatementAuthorizerActionKind::CreateIndex + | StatementAuthorizerActionKind::CreateTable + | StatementAuthorizerActionKind::CreateTrigger + | StatementAuthorizerActionKind::CreateView + | StatementAuthorizerActionKind::CreateVirtualTable + | StatementAuthorizerActionKind::CreateTempIndex + | StatementAuthorizerActionKind::CreateTempTable + | StatementAuthorizerActionKind::CreateTempTrigger + | StatementAuthorizerActionKind::CreateTempView + | StatementAuthorizerActionKind::DropIndex + | StatementAuthorizerActionKind::DropTable + | StatementAuthorizerActionKind::DropTrigger + | StatementAuthorizerActionKind::DropView + | StatementAuthorizerActionKind::DropVirtualTable + | StatementAuthorizerActionKind::DropTempIndex + | StatementAuthorizerActionKind::DropTempTable + | StatementAuthorizerActionKind::DropTempTrigger + | StatementAuthorizerActionKind::DropTempView + | StatementAuthorizerActionKind::AlterTable + | StatementAuthorizerActionKind::Reindex + | StatementAuthorizerActionKind::Analyze => SQLITE_DENY, + } +} + +fn reader_pragma_allowed(first_arg: Option<&str>, second_arg: Option<&str>) -> bool { + let Some(name) = first_arg else { + return false; + }; + if second_arg.is_some() { + return false; + } + + matches!( + name.to_ascii_lowercase().as_str(), + "application_id" + | "busy_timeout" + | "cache_size" + | "collation_list" + | "compile_options" + | "database_list" + | "encoding" + | "foreign_key_check" + | "foreign_key_list" + | "freelist_count" + | "function_list" + | "index_info" + | "index_list" + | "index_xinfo" + | "integrity_check" + | "journal_mode" + | "module_list" + | "page_count" + | "page_size" + | "pragma_list" + | "quick_check" + | "schema_version" + | "table_info" + | "table_list" + | "table_xinfo" + | "user_version" + ) +} + +fn reader_function_allowed(first_arg: Option<&str>, second_arg: Option<&str>) -> bool { + let name = second_arg.or(first_arg); + !matches!( + name.map(str::to_ascii_lowercase).as_deref(), + Some("load_extension") | Some("writefile") + ) +} + +unsafe fn optional_c_string(value: *const c_char) -> Option { + if value.is_null() { + None + } else { + Some( + unsafe { CStr::from_ptr(value) } + .to_string_lossy() + .into_owned(), + ) + } +} + +fn has_non_whitespace_tail(tail: *const c_char) -> bool { + if tail.is_null() { + return false; + } + + let bytes = unsafe { CStr::from_ptr(tail).to_bytes() }; + bytes.iter().any(|byte| !byte.is_ascii_whitespace()) +} + fn sqlite_error(db: *mut sqlite3, context: &str) -> anyhow::Error { let message = unsafe { if db.is_null() { @@ -376,4 +899,144 @@ mod tests { assert_eq!(result.columns, vec!["count"]); assert_eq!(result.rows, vec![vec![ColumnValue::Integer(2)]]); } + + #[test] + fn execute_single_statement_returns_rows_and_read_route() { + let db = MemoryDb::open(); + let result = execute_single_statement( + db.as_ptr(), + "SELECT 7 AS value;", + None, + ExecuteRoute::Read, + ) + .unwrap(); + + assert_eq!(result.columns, vec!["value"]); + assert_eq!(result.rows, vec![vec![ColumnValue::Integer(7)]]); + assert_eq!(result.changes, 0); + assert_eq!(result.last_insert_row_id, None); + assert_eq!(result.route, ExecuteRoute::Read); + } + + #[test] + fn execute_single_statement_returns_write_metadata() { + let db = MemoryDb::open(); + exec_statements( + db.as_ptr(), + "CREATE TABLE execute_items(id INTEGER PRIMARY KEY, label TEXT);", + ) + .unwrap(); + + let result = execute_single_statement( + db.as_ptr(), + "INSERT INTO execute_items(label) VALUES (?);", + Some(&[BindParam::Text("alpha".to_owned())]), + ExecuteRoute::Write, + ) + .unwrap(); + + assert_eq!(result.columns, Vec::::new()); + assert_eq!(result.rows, Vec::>::new()); + assert_eq!(result.changes, 1); + assert_eq!(result.last_insert_row_id, Some(1)); + assert_eq!(result.route, ExecuteRoute::Write); + } + + #[test] + fn execute_single_statement_collects_insert_returning_rows() { + let db = MemoryDb::open(); + exec_statements( + db.as_ptr(), + "CREATE TABLE execute_returning(id INTEGER PRIMARY KEY, label TEXT);", + ) + .unwrap(); + + let result = execute_single_statement( + db.as_ptr(), + "INSERT INTO execute_returning(label) VALUES ('bravo') RETURNING id, label;", + None, + ExecuteRoute::Write, + ) + .unwrap(); + + assert_eq!(result.columns, vec!["id", "label"]); + assert_eq!( + result.rows, + vec![vec![ + ColumnValue::Integer(1), + ColumnValue::Text("bravo".to_owned()) + ]] + ); + assert_eq!(result.changes, 1); + assert_eq!(result.last_insert_row_id, Some(1)); + assert_eq!(result.route, ExecuteRoute::Write); + } + + #[test] + fn execute_single_statement_collects_readonly_pragma_rows() { + let db = MemoryDb::open(); + let result = + execute_single_statement(db.as_ptr(), "PRAGMA user_version;", None, ExecuteRoute::Read) + .unwrap(); + + assert_eq!(result.columns, vec!["user_version"]); + assert_eq!(result.rows, vec![vec![ColumnValue::Integer(0)]]); + assert_eq!(result.changes, 0); + assert_eq!(result.route, ExecuteRoute::Read); + } + + #[test] + fn execute_single_statement_runs_mutating_pragma_in_write_route() { + let db = MemoryDb::open(); + let result = execute_single_statement( + db.as_ptr(), + "PRAGMA user_version = 9;", + None, + ExecuteRoute::Write, + ) + .unwrap(); + + assert_eq!(result.columns, Vec::::new()); + assert_eq!(result.rows, Vec::>::new()); + assert_eq!(result.route, ExecuteRoute::Write); + + let version = + execute_single_statement(db.as_ptr(), "PRAGMA user_version;", None, ExecuteRoute::Read) + .unwrap(); + assert_eq!(version.rows, vec![vec![ColumnValue::Integer(9)]]); + } + + #[test] + fn execute_single_statement_rejects_multi_statement_sql() { + let db = MemoryDb::open(); + let err = execute_single_statement( + db.as_ptr(), + "SELECT 1; SELECT 2;", + None, + ExecuteRoute::WriteFallback, + ) + .expect_err("multi statement execute should fail"); + + assert!( + err.to_string().contains("single statement"), + "unexpected error: {err:#}" + ); + } + + #[test] + fn execute_single_statement_reports_malformed_sql() { + let db = MemoryDb::open(); + let err = execute_single_statement( + db.as_ptr(), + "SELECT FROM", + None, + ExecuteRoute::WriteFallback, + ) + .expect_err("malformed execute should fail"); + + assert!( + err.to_string().contains("failed to prepare"), + "unexpected error: {err:#}" + ); + } } diff --git a/rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs b/rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs index b7130e95c1..f0c482b4d1 100644 --- a/rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs +++ b/rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs @@ -10,7 +10,7 @@ use std::sync::Arc; #[cfg(test)] use std::sync::atomic::{AtomicBool, AtomicUsize}; use std::sync::atomic::{AtomicU64, Ordering}; -use std::time::Instant; +use std::time::{Duration, Instant}; use anyhow::Result; use libsqlite3_sys::*; @@ -25,10 +25,12 @@ use tokio::runtime::Handle; #[cfg(test)] use tokio::sync::Notify; -use crate::optimization_flags::{SqliteOptimizationFlags, sqlite_optimization_flags}; +use crate::optimization_flags::{ + SqliteOptimizationFlags, SqliteReadAheadMode, SqliteVfsPageCacheMode, + sqlite_optimization_flags, +}; const DEFAULT_PREFETCH_DEPTH: usize = 64; -const LEGACY_PREFETCH_DEPTH: usize = 16; const DEFAULT_MAX_PREFETCH_BYTES: usize = 256 * 1024; const DEFAULT_ADAPTIVE_PREFETCH_DEPTH: usize = 256; const DEFAULT_ADAPTIVE_MAX_PREFETCH_BYTES: usize = 1024 * 1024; @@ -142,13 +144,17 @@ impl SqliteTransport { #[cfg(test)] SqliteTransportInner::Direct { engine, .. } => { let pgnos = req.pgnos.clone(); - match engine.get_pages(&req.actor_id, req.generation, pgnos).await { - Ok(pages) => Ok(protocol::SqliteGetPagesResponse::SqliteGetPagesOk( - protocol::SqliteGetPagesOk { - pages: pages.into_iter().map(protocol_fetched_page).collect(), - meta: protocol_sqlite_meta(engine.load_meta(&req.actor_id).await?), - }, - )), + match engine.get_pages(&req.actor_id, req.generation, pgnos).await { + Ok(result) => Ok(protocol::SqliteGetPagesResponse::SqliteGetPagesOk( + protocol::SqliteGetPagesOk { + pages: result + .pages + .into_iter() + .map(protocol_fetched_page) + .collect(), + meta: protocol_sqlite_meta(result.meta), + }, + )), Err(err) => { if let Some(SqliteStorageError::FenceMismatch { reason }) = sqlite_storage_error(&err) @@ -187,19 +193,18 @@ impl SqliteTransport { .get_pages(&req.actor_id, req.generation, req.pgnos) .await { - Ok(pages) => { - Ok(protocol::SqliteGetPagesResponse::SqliteGetPagesOk( - protocol::SqliteGetPagesOk { - pages: pages - .into_iter() - .map(protocol_fetched_page) - .collect(), - meta: protocol_sqlite_meta( - engine.load_meta(&req.actor_id).await?, - ), - }, - )) - } + Ok(result) => { + Ok(protocol::SqliteGetPagesResponse::SqliteGetPagesOk( + protocol::SqliteGetPagesOk { + pages: result + .pages + .into_iter() + .map(protocol_fetched_page) + .collect(), + meta: protocol_sqlite_meta(result.meta), + }, + )) + } Err(retry_err) => { Ok(protocol::SqliteGetPagesResponse::SqliteErrorResponse( sqlite_error_response(&retry_err), @@ -237,13 +242,17 @@ impl SqliteTransport { ) .await { - Ok(pages) => Ok(protocol::SqliteGetPageRangeResponse::SqliteGetPageRangeOk( - protocol::SqliteGetPageRangeOk { - start_pgno: req.start_pgno, - pages: pages.into_iter().map(protocol_fetched_page).collect(), - meta: protocol_sqlite_meta(engine.load_meta(&req.actor_id).await?), - }, - )), + Ok(result) => Ok(protocol::SqliteGetPageRangeResponse::SqliteGetPageRangeOk( + protocol::SqliteGetPageRangeOk { + start_pgno: req.start_pgno, + pages: result + .pages + .into_iter() + .map(protocol_fetched_page) + .collect(), + meta: protocol_sqlite_meta(result.meta), + }, + )), Err(err) => { if let Some(SqliteStorageError::FenceMismatch { reason }) = sqlite_storage_error(&err) @@ -811,11 +820,9 @@ fn sqlite_meta(max_delta_bytes: u64) -> protocol::SqliteMeta { #[derive(Debug, Clone)] pub struct VfsConfig { pub cache_capacity_pages: u64, - pub cache_fetched_pages: bool, - pub cache_prefetched_pages: bool, - pub cache_startup_preloaded_pages: bool, - pub scan_resistant_cache: bool, + pub page_cache_mode: SqliteVfsPageCacheMode, pub protected_cache_pages: usize, + pub read_ahead_mode: SqliteReadAheadMode, pub prefetch_depth: usize, pub adaptive_prefetch_depth: usize, pub max_prefetch_bytes: usize, @@ -823,9 +830,7 @@ pub struct VfsConfig { pub max_pages_per_stage: usize, pub recent_hint_page_budget: usize, pub recent_hint_range_budget: usize, - pub cache_hit_predictor_training: bool, pub recent_page_hints: bool, - pub adaptive_read_ahead: bool, pub range_reads: bool, } @@ -839,15 +844,13 @@ impl VfsConfig { pub fn from_optimization_flags(flags: SqliteOptimizationFlags) -> Self { Self { cache_capacity_pages: flags.vfs_page_cache_capacity_pages, - cache_fetched_pages: flags.vfs_cache_fetched_pages, - cache_prefetched_pages: flags.vfs_cache_prefetched_pages, - cache_startup_preloaded_pages: flags.vfs_cache_startup_preloaded_pages, - scan_resistant_cache: flags.vfs_scan_resistant_cache, + page_cache_mode: flags.vfs_page_cache_mode, protected_cache_pages: flags.vfs_protected_cache_pages, - prefetch_depth: if flags.read_ahead { + read_ahead_mode: flags.read_ahead_mode, + prefetch_depth: if flags.read_ahead_mode.uses_bounded_prefetch() { DEFAULT_PREFETCH_DEPTH } else { - LEGACY_PREFETCH_DEPTH + 0 }, adaptive_prefetch_depth: DEFAULT_ADAPTIVE_PREFETCH_DEPTH, max_prefetch_bytes: DEFAULT_MAX_PREFETCH_BYTES, @@ -863,9 +866,7 @@ impl VfsConfig { } else { 0 }, - cache_hit_predictor_training: flags.cache_hit_predictor_training, recent_page_hints: flags.recent_page_hints, - adaptive_read_ahead: flags.adaptive_read_ahead, range_reads: flags.range_reads, } } @@ -936,6 +937,28 @@ pub trait SqliteVfsMetrics: Send + Sync { _total_ns: u64, ) { } + + fn set_read_pool_active_readers(&self, _readers: u64) {} + + fn set_read_pool_idle_readers(&self, _readers: u64) {} + + fn observe_read_pool_read_wait(&self, _duration: Duration) {} + + fn observe_read_pool_write_wait(&self, _duration: Duration) {} + + fn record_read_pool_routed_read_query(&self) {} + + fn record_read_pool_write_fallback_query(&self) {} + + fn observe_read_pool_manual_transaction(&self, _duration: Duration) {} + + fn record_read_pool_reader_open(&self) {} + + fn record_read_pool_reader_close(&self, _count: u64) {} + + fn record_read_pool_rejected_reader_mutation(&self) {} + + fn record_read_pool_mode_transition(&self, _from: &str, _to: &str) {} } #[derive(Debug, Clone, Copy, Default)] @@ -951,6 +974,7 @@ pub struct VfsContext { config: VfsConfig, state: RwLock, aux_files: RwLock>>, + aux_file_roles: RwLock>, last_error: Mutex>, #[cfg(test)] fail_next_aux_open: Mutex>, @@ -995,6 +1019,7 @@ struct PrefetchPredictor { #[derive(Debug, Clone, Copy, PartialEq, Eq)] enum ReadAheadMode { + Off, Bounded, ForwardScan, BackwardScan, @@ -1073,6 +1098,7 @@ struct VfsFile { base: sqlite3_file, ctx: *const VfsContext, aux: *mut AuxFileHandle, + role: VfsFileRole, } #[derive(Default)] @@ -1084,26 +1110,67 @@ struct AuxFileHandle { path: String, state: Arc, delete_on_close: bool, + role: VfsFileRole, +} + +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +enum VfsFileRole { + Reader, + Writer, +} + +impl VfsFileRole { + fn from_open_flags(flags: c_int) -> Self { + if (flags & SQLITE_OPEN_READWRITE) != 0 { + Self::Writer + } else { + Self::Reader + } + } + + fn out_flags(self, flags: c_int) -> c_int { + match self { + Self::Reader => (flags | SQLITE_OPEN_READONLY) & !SQLITE_OPEN_READWRITE, + Self::Writer => (flags | SQLITE_OPEN_READWRITE) & !SQLITE_OPEN_READONLY, + } + } + + fn is_reader(self) -> bool { + matches!(self, Self::Reader) + } } unsafe impl Send for VfsContext {} unsafe impl Sync for VfsContext {} -pub struct SqliteVfs { +struct SqliteVfsInner { vfs_ptr: *mut sqlite3_vfs, _name: CString, ctx_ptr: *mut VfsContext, } -unsafe impl Send for SqliteVfs {} -unsafe impl Sync for SqliteVfs {} +unsafe impl Send for SqliteVfsInner {} +unsafe impl Sync for SqliteVfsInner {} + +#[derive(Clone)] +pub struct NativeVfsHandle { + inner: Arc, +} + +pub type SqliteVfs = NativeVfsHandle; pub struct NativeDatabase { + connection: NativeConnection, + vfs: NativeVfsHandle, +} + +pub struct NativeConnection { db: *mut sqlite3, - _vfs: SqliteVfs, + _vfs: NativeVfsHandle, } unsafe impl Send for NativeDatabase {} +unsafe impl Send for NativeConnection {} fn select_page_fetch_transport( to_fetch: &[u32], @@ -1255,6 +1322,15 @@ impl PrefetchPredictor { impl AdaptiveReadAhead { fn record_and_plan(&mut self, pgnos: &[u32], config: &VfsConfig) -> ReadAheadPlan { + if matches!(config.read_ahead_mode, SqliteReadAheadMode::Off) { + return ReadAheadPlan { + mode: ReadAheadMode::Off, + depth: 0, + max_bytes: 0, + seed_pgno: pgnos.last().copied(), + }; + } + let mut scan_seed_pgno = None; let mut scan_direction = None; for pgno in pgnos.iter().copied() { @@ -1264,7 +1340,7 @@ impl AdaptiveReadAhead { } } - if config.adaptive_read_ahead + if config.read_ahead_mode.uses_adaptive_prefetch() && self.score >= SCAN_SCORE_THRESHOLD && scan_seed_pgno.is_some() && scan_direction.is_some() @@ -1638,12 +1714,15 @@ impl VfsState { let page_cache = Cache::builder() .max_capacity(config.cache_capacity_pages) .build(); - let mut protected_page_cache = ProtectedPageCache::new(if config.scan_resistant_cache { + let mut protected_page_cache = ProtectedPageCache::new(if config + .page_cache_mode + .caches_target_pages() + { config.protected_cache_pages } else { 0 }); - if config.cache_startup_preloaded_pages { + if config.page_cache_mode.caches_startup_preloaded_pages() { for page in &startup.preloaded_pages { if let Some(bytes) = &page.bytes { page_cache.insert(page.pgno, bytes.clone()); @@ -1684,20 +1763,20 @@ impl VfsState { config: &VfsConfig, ) { let should_cache = if target_page { - config.cache_fetched_pages + config.page_cache_mode.caches_target_pages() } else { - config.cache_prefetched_pages + config.page_cache_mode.caches_prefetched_pages() }; if should_cache { self.page_cache.insert(pgno, bytes.clone()); } - if target_page && config.cache_fetched_pages && config.scan_resistant_cache { + if target_page && config.page_cache_mode.caches_target_pages() { self.protected_page_cache.record_target_access(pgno, bytes); } } fn record_target_cache_access(&mut self, pgno: u32, bytes: Vec, config: &VfsConfig) { - if config.cache_fetched_pages && config.scan_resistant_cache { + if config.page_cache_mode.caches_target_pages() { self.protected_page_cache.record_target_access(pgno, bytes); } } @@ -1732,6 +1811,7 @@ impl VfsContext { config: config.clone(), state: RwLock::new(VfsState::new(&config, &startup)), aux_files: RwLock::new(BTreeMap::new()), + aux_file_roles: RwLock::new(BTreeMap::new()), last_error: Mutex::new(None), #[cfg(test)] fail_next_aux_open: Mutex::new(None), @@ -1781,20 +1861,30 @@ impl VfsContext { self.state.read().page_size.max(DEFAULT_PAGE_SIZE) } - fn open_aux_file(&self, path: &str) -> Arc { + fn open_aux_file(&self, path: &str, role: VfsFileRole) -> Arc { let mut aux_files = self.aux_files.write(); - aux_files + let state = aux_files .entry(path.to_string()) .or_insert_with(|| Arc::new(AuxFileState::default())) - .clone() + .clone(); + self.aux_file_roles + .write() + .entry(path.to_string()) + .or_insert(role); + state } fn aux_file_exists(&self, path: &str) -> bool { self.aux_files.read().contains_key(path) } + fn aux_file_role(&self, path: &str) -> Option { + self.aux_file_roles.read().get(path).copied() + } + fn delete_aux_file(&self, path: &str) { self.aux_files.write().remove(path); + self.aux_file_roles.write().remove(path); } #[cfg(test)] @@ -1862,13 +1952,15 @@ impl VfsContext { resolved.insert(pgno, Some(bytes.clone())); continue; } - if let Some(bytes) = state.page_cache.get(&pgno) { - resolved.insert(pgno, Some(bytes)); - continue; - } - if let Some(bytes) = state.protected_page_cache.get(&pgno) { - resolved.insert(pgno, Some(bytes)); - continue; + if self.config.page_cache_mode.caches_any_pages() { + if let Some(bytes) = state.page_cache.get(&pgno) { + resolved.insert(pgno, Some(bytes)); + continue; + } + if let Some(bytes) = state.protected_page_cache.get(&pgno) { + resolved.insert(pgno, Some(bytes)); + continue; + } } missing.push(pgno); } @@ -1876,7 +1968,7 @@ impl VfsContext { if missing.is_empty() { let mut state = self.state.write(); - if self.config.cache_hit_predictor_training { + if self.config.read_ahead_mode.uses_bounded_prefetch() { for pgno in target_pgnos.iter().copied() { state.predictor.record(pgno); } @@ -1913,8 +2005,10 @@ impl VfsContext { fetch_transport, ) = { let mut state = self.state.write(); - for pgno in target_pgnos.iter().copied() { - state.predictor.record(pgno); + if self.config.read_ahead_mode.uses_bounded_prefetch() { + for pgno in target_pgnos.iter().copied() { + state.predictor.record(pgno); + } } let read_ahead_plan = state.read_ahead.record_and_plan(target_pgnos, &self.config); if self.config.recent_page_hints { @@ -2369,6 +2463,15 @@ unsafe fn get_aux_state(file: &VfsFile) -> Option<&AuxFileHandle> { (!file.aux.is_null()).then(|| &*file.aux) } +fn reject_reader_mutation(ctx: &VfsContext, operation: &str) { + ctx.set_last_error(format!( + "reader sqlite VFS handle attempted mutating operation {operation}" + )); + if let Some(metrics) = &ctx.metrics { + metrics.record_read_pool_rejected_reader_mutation(); + } +} + async fn commit_buffered_pages( transport: &SqliteTransport, request: BufferedCommitRequest, @@ -2786,6 +2889,10 @@ unsafe extern "C" fn io_close(p_file: *mut sqlite3_file) -> c_int { state.write_buffer.in_atomic_write || !state.write_buffer.dirty.is_empty() }; if should_flush { + if file.role.is_reader() { + reject_reader_mutation(ctx, "dirty xClose"); + return SQLITE_IOERR; + } if ctx.state.read().write_buffer.in_atomic_write { ctx.commit_atomic_write().map(|_| ()) } else { @@ -2910,6 +3017,14 @@ unsafe extern "C" fn io_write( } let file = get_file(p_file); + let ctx = &*file.ctx; + let role = get_aux_state(file) + .map(|aux| aux.role) + .unwrap_or(file.role); + if role.is_reader() { + reject_reader_mutation(ctx, "xWrite"); + return SQLITE_IOERR_WRITE; + } if let Some(aux) = get_aux_state(file) { if i_offset < 0 { return SQLITE_IOERR_WRITE; @@ -2926,7 +3041,6 @@ unsafe extern "C" fn io_write( return SQLITE_OK; } - let ctx = &*file.ctx; if ctx.is_dead() { return SQLITE_IOERR_WRITE; } @@ -3033,11 +3147,18 @@ unsafe extern "C" fn io_truncate(p_file: *mut sqlite3_file, size: sqlite3_int64) return SQLITE_IOERR_TRUNCATE; } let file = get_file(p_file); + let ctx = &*file.ctx; + let role = get_aux_state(file) + .map(|aux| aux.role) + .unwrap_or(file.role); + if role.is_reader() { + reject_reader_mutation(ctx, "xTruncate"); + return SQLITE_IOERR_TRUNCATE; + } if let Some(aux) = get_aux_state(file) { aux.state.bytes.lock().truncate(size as usize); return SQLITE_OK; } - let ctx = &*file.ctx; ctx.truncate_main_file(size); SQLITE_OK }) @@ -3050,6 +3171,15 @@ unsafe extern "C" fn io_sync(p_file: *mut sqlite3_file, _flags: c_int) -> c_int return SQLITE_OK; } let ctx = &*file.ctx; + if file.role.is_reader() { + let state = ctx.state.read(); + if state.write_buffer.in_atomic_write || !state.write_buffer.dirty.is_empty() { + drop(state); + reject_reader_mutation(ctx, "dirty xSync"); + return SQLITE_IOERR_FSYNC; + } + return SQLITE_OK; + } match ctx.flush_dirty_pages() { Ok(_) => SQLITE_OK, Err(err) => { @@ -3112,13 +3242,22 @@ unsafe extern "C" fn io_file_control( match op { SQLITE_FCNTL_BEGIN_ATOMIC_WRITE => { + if file.role.is_reader() { + reject_reader_mutation(ctx, "begin atomic write file-control"); + return SQLITE_READONLY; + } let mut state = ctx.state.write(); state.write_buffer.in_atomic_write = true; state.write_buffer.saved_db_size = state.db_size_pages; state.write_buffer.dirty.clear(); SQLITE_OK } - SQLITE_FCNTL_COMMIT_ATOMIC_WRITE => match ctx.commit_atomic_write() { + SQLITE_FCNTL_COMMIT_ATOMIC_WRITE => { + if file.role.is_reader() { + reject_reader_mutation(ctx, "commit atomic write file-control"); + return SQLITE_READONLY; + } + match ctx.commit_atomic_write() { Ok(()) => { ctx.commit_atomic_count.fetch_add(1, Ordering::Relaxed); SQLITE_OK @@ -3133,8 +3272,13 @@ unsafe extern "C" fn io_file_control( mark_dead_from_fence_commit_error(ctx, &err); SQLITE_IOERR } - }, + } + } SQLITE_FCNTL_ROLLBACK_ATOMIC_WRITE => { + if file.role.is_reader() { + reject_reader_mutation(ctx, "rollback atomic write file-control"); + return SQLITE_READONLY; + } let mut state = ctx.state.write(); state.write_buffer.dirty.clear(); state.write_buffer.in_atomic_write = false; @@ -3153,7 +3297,7 @@ unsafe extern "C" fn io_sector_size(_p_file: *mut sqlite3_file) -> c_int { unsafe extern "C" fn io_device_characteristics(p_file: *mut sqlite3_file) -> c_int { vfs_catch_unwind!(0, { let file = get_file(p_file); - if get_aux_state(file).is_some() { + if file.role.is_reader() || get_aux_state(file).is_some() { 0 } else { SQLITE_IOCAP_BATCH_ATOMIC @@ -3185,6 +3329,16 @@ unsafe extern "C" fn vfs_open( }; let is_main = path == ctx.actor_id && !delete_on_close && (flags & SQLITE_OPEN_MAIN_DB) != 0; + let role = VfsFileRole::from_open_flags(flags); + + if !is_main && role.is_reader() && !ctx.aux_file_exists(&path) { + // Reader auxiliary files are not safe yet. A reader connection may only + // open an existing auxiliary path without creating new mutable state. + ctx.set_last_error(format!( + "reader sqlite VFS handle attempted auxiliary file creation for {path}" + )); + return SQLITE_CANTOPEN; + } #[cfg(test)] if !is_main { @@ -3202,8 +3356,9 @@ unsafe extern "C" fn vfs_open( } else { Box::into_raw(Box::new(AuxFileHandle { path: path.clone(), - state: ctx.open_aux_file(&path), + state: ctx.open_aux_file(&path, role), delete_on_close, + role, })) }; ptr::write( @@ -3212,11 +3367,12 @@ unsafe extern "C" fn vfs_open( base, ctx: ctx as *const VfsContext, aux, + role, }, ); if !p_out_flags.is_null() { - *p_out_flags = flags; + *p_out_flags = role.out_flags(flags); } SQLITE_OK @@ -3239,6 +3395,10 @@ unsafe extern "C" fn vfs_delete( Err(_) => return SQLITE_OK, }; if path != ctx.actor_id { + if matches!(ctx.aux_file_role(path), Some(VfsFileRole::Reader)) { + reject_reader_mutation(ctx, "xDelete"); + return SQLITE_READONLY; + } #[cfg(test)] if let Some(message) = ctx.take_aux_delete_error() { ctx.set_last_error(message); @@ -3359,7 +3519,7 @@ unsafe extern "C" fn vfs_get_last_error( }) } -impl SqliteVfs { +impl NativeVfsHandle { pub fn register( name: &str, handle: EnvoyHandle, @@ -3380,16 +3540,16 @@ impl SqliteVfs { ) } - fn take_last_error(&self) -> Option { - unsafe { (*self.ctx_ptr).take_last_error() } + pub(crate) fn take_last_error(&self) -> Option { + unsafe { (*self.inner.ctx_ptr).take_last_error() } } fn clone_last_error(&self) -> Option { - unsafe { (*self.ctx_ptr).clone_last_error() } + unsafe { (*self.inner.ctx_ptr).clone_last_error() } } - fn snapshot_preload_hints(&self) -> VfsPreloadHintSnapshot { - unsafe { (*self.ctx_ptr).snapshot_preload_hints() } + pub(crate) fn snapshot_preload_hints(&self) -> VfsPreloadHintSnapshot { + unsafe { (*self.inner.ctx_ptr).snapshot_preload_hints() } } fn register_with_transport( @@ -3448,22 +3608,28 @@ impl SqliteVfs { } Ok(Self { + inner: Arc::new(SqliteVfsInner { vfs_ptr, _name: name_cstring, ctx_ptr, + }), }) } pub fn name_ptr(&self) -> *const c_char { - self._name.as_ptr() + self.inner._name.as_ptr() } fn commit_atomic_count(&self) -> u64 { - unsafe { (*self.ctx_ptr).commit_atomic_count.load(Ordering::Relaxed) } + unsafe { + (*self.inner.ctx_ptr) + .commit_atomic_count + .load(Ordering::Relaxed) + } } } -impl Drop for SqliteVfs { +impl Drop for SqliteVfsInner { fn drop(&mut self) { unsafe { sqlite3_vfs_unregister(self.vfs_ptr); @@ -3475,19 +3641,29 @@ impl Drop for SqliteVfs { impl NativeDatabase { pub fn as_ptr(&self) -> *mut sqlite3 { - self.db + self.connection.as_ptr() } pub fn take_last_kv_error(&self) -> Option { - self._vfs.take_last_error() + self.vfs.take_last_error() } pub fn snapshot_preload_hints(&self) -> VfsPreloadHintSnapshot { - self._vfs.snapshot_preload_hints() + self.vfs.snapshot_preload_hints() + } + + pub fn vfs_handle(&self) -> NativeVfsHandle { + self.vfs.clone() } } -impl Drop for NativeDatabase { +impl NativeConnection { + pub fn as_ptr(&self) -> *mut sqlite3 { + self.db + } +} + +impl Drop for NativeConnection { fn drop(&mut self) { if !self.db.is_null() { let rc = unsafe { sqlite3_close_v2(self.db) }; @@ -3503,10 +3679,11 @@ impl Drop for NativeDatabase { } } -pub fn open_database( - vfs: SqliteVfs, +pub fn open_connection( + vfs: NativeVfsHandle, file_name: &str, -) -> std::result::Result { + flags: c_int, +) -> std::result::Result { let c_name = CString::new(file_name).map_err(|err| err.to_string())?; let mut db: *mut sqlite3 = ptr::null_mut(); @@ -3514,7 +3691,7 @@ pub fn open_database( sqlite3_open_v2( c_name.as_ptr(), &mut db, - SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, + flags, vfs.name_ptr(), ) }; @@ -3535,6 +3712,30 @@ pub fn open_database( return Err(format!("sqlite3_open_v2 failed with code {rc}: {message}")); } + Ok(NativeConnection { db, _vfs: vfs }) +} + +pub fn open_database( + vfs: NativeVfsHandle, + file_name: &str, +) -> std::result::Result { + let connection = open_connection( + vfs.clone(), + file_name, + SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, + )?; + + configure_connection_for_database(connection.as_ptr(), &vfs, file_name)?; + verify_batch_atomic_writes(connection.as_ptr(), &vfs, file_name)?; + + Ok(NativeDatabase { connection, vfs }) +} + +pub(crate) fn configure_connection_for_database( + db: *mut sqlite3, + vfs: &NativeVfsHandle, + file_name: &str, +) -> std::result::Result<(), String> { for pragma in &[ "PRAGMA page_size = 4096;", "PRAGMA journal_mode = DELETE;", @@ -3551,27 +3752,29 @@ pub fn open_database( last_error = ?vfs.clone_last_error(), "failed to configure sqlite database" ); - unsafe { - sqlite3_close(db); - } return Err(err); } } - if let Err(err) = assert_batch_atomic_probe(db, &vfs) { + Ok(()) +} + +pub(crate) fn verify_batch_atomic_writes( + db: *mut sqlite3, + vfs: &NativeVfsHandle, + file_name: &str, +) -> std::result::Result<(), String> { + if let Err(err) = assert_batch_atomic_probe(db, vfs) { tracing::error!( file_name, %err, last_error = ?vfs.clone_last_error(), "failed to verify sqlite batch atomic writes" ); - unsafe { - sqlite3_close(db); - } return Err(err); } - Ok(NativeDatabase { db, _vfs: vfs }) + Ok(()) } #[cfg(test)] @@ -3579,13 +3782,21 @@ mod tests { use std::sync::atomic::{AtomicBool, AtomicU64, Ordering as AtomicOrdering}; use std::sync::{Arc, Barrier}; use std::thread; + use std::time::Duration; use parking_lot::Mutex as SyncMutex; use tempfile::TempDir; use tokio::runtime::Builder; + use tokio::sync::oneshot; + use tokio::time::timeout; use universaldb::Subspace; use super::*; + use crate::connection_manager::{ + NativeConnectionManager, NativeConnectionManagerConfig, NativeConnectionManagerMode, + }; + use crate::database::{NativeDatabaseHandle, vfs_name_for_actor_database}; + use crate::query::{ColumnValue, ExecuteRoute}; static TEST_ID: AtomicU64 = AtomicU64::new(1); @@ -3842,17 +4053,18 @@ mod tests { self.open_db_on_engine_with_metrics(runtime, engine, actor_id, config, None) } - fn open_db_on_engine_with_metrics( + fn open_vfs_on_engine_with_metrics( &self, runtime: &tokio::runtime::Runtime, engine: Arc, actor_id: &str, + name: &str, config: VfsConfig, metrics: Option>, - ) -> NativeDatabase { + ) -> NativeVfsHandle { let startup = runtime.block_on(self.startup_data_for(actor_id, &engine)); - let vfs = SqliteVfs::register_with_transport( - &next_test_name("sqlite-direct-vfs"), + SqliteVfs::register_with_transport( + name, SqliteTransport::from_direct(engine), actor_id.to_string(), runtime.handle().clone(), @@ -3860,7 +4072,21 @@ mod tests { config, metrics, ) - .expect("v2 vfs should register"); + .expect("v2 vfs should register") + } + + fn open_db_on_engine_with_metrics( + &self, + runtime: &tokio::runtime::Runtime, + engine: Arc, + actor_id: &str, + config: VfsConfig, + metrics: Option>, + ) -> NativeDatabase { + let vfs_name = next_test_name("sqlite-direct-vfs"); + let vfs = self.open_vfs_on_engine_with_metrics( + runtime, engine, actor_id, &vfs_name, config, metrics, + ); open_database(vfs, actor_id).expect("sqlite database should open") } @@ -3887,7 +4113,20 @@ mod tests { } fn direct_vfs_ctx(db: &NativeDatabase) -> &VfsContext { - unsafe { &*db._vfs.ctx_ptr } + unsafe { &*db.vfs.inner.ctx_ptr } + } + + fn direct_vfs_handle_ctx(vfs: &NativeVfsHandle) -> &VfsContext { + unsafe { &*vfs.inner.ctx_ptr } + } + + fn direct_connection_vfs_ctx(connection: &NativeConnection) -> &VfsContext { + unsafe { &*connection._vfs.inner.ctx_ptr } + } + + fn sqlite_vfs_registered(name: &str) -> bool { + let name = CString::new(name).expect("vfs name should not contain NUL"); + unsafe { !sqlite3_vfs_find(name.as_ptr()).is_null() } } fn sqlite_query_i64(db: *mut sqlite3, sql: &str) -> std::result::Result { @@ -3970,6 +4209,21 @@ mod tests { Ok(rc) } + fn test_vfs_file(ctx: &VfsContext, role: VfsFileRole) -> Box { + Box::new(VfsFile { + base: sqlite3_file { + pMethods: ctx.io_methods.as_ref(), + }, + ctx: ctx as *const VfsContext, + aux: ptr::null_mut(), + role, + }) + } + + fn test_vfs_file_ptr(file: &mut VfsFile) -> *mut sqlite3_file { + (file as *mut VfsFile).cast() + } + fn direct_runtime() -> tokio::runtime::Runtime { Builder::new_multi_thread() .worker_threads(2) @@ -4250,13 +4504,13 @@ mod tests { } #[test] - fn disabled_read_ahead_flag_restores_legacy_prefetch_depth() { + fn read_ahead_off_disables_bounded_prefetch() { let config = VfsConfig::from_optimization_flags(SqliteOptimizationFlags { - read_ahead: false, + read_ahead_mode: SqliteReadAheadMode::Off, ..SqliteOptimizationFlags::default() }); - assert_eq!(config.prefetch_depth, LEGACY_PREFETCH_DEPTH); + assert_eq!(config.prefetch_depth, 0); } #[test] @@ -4495,7 +4749,7 @@ mod tests { } #[test] - fn disabled_adaptive_read_ahead_keeps_forward_scan_to_one_shard() { + fn bounded_read_ahead_keeps_forward_scan_to_one_shard() { let runtime = Builder::new_current_thread() .enable_all() .build() @@ -4541,7 +4795,7 @@ mod tests { preloaded_pages: Vec::new(), }, VfsConfig::from_optimization_flags(SqliteOptimizationFlags { - adaptive_read_ahead: false, + read_ahead_mode: SqliteReadAheadMode::Bounded, ..SqliteOptimizationFlags::default() }), unsafe { std::mem::zeroed() }, @@ -4562,74 +4816,6 @@ mod tests { assert_eq!(requests[1].pgnos, (76..140).collect::>()); } - #[test] - fn disabled_cache_hit_training_bypasses_hit_path_predictor_updates() { - let runtime = Builder::new_current_thread() - .enable_all() - .build() - .expect("runtime should build"); - let mut protocol = MockProtocol::new( - protocol::SqliteCommitResponse::SqliteCommitOk(protocol::SqliteCommitOk { - new_head_txid: 13, - meta: sqlite_meta(8 * 1024 * 1024), - }), - protocol::SqliteCommitStageResponse::SqliteCommitStageOk( - protocol::SqliteCommitStageOk { - chunk_idx_committed: 0, - }, - ), - protocol::SqliteCommitFinalizeResponse::SqliteCommitFinalizeOk( - protocol::SqliteCommitFinalizeOk { - new_head_txid: 13, - meta: sqlite_meta(8 * 1024 * 1024), - }, - ), - ); - protocol.get_pages_response = - protocol::SqliteGetPagesResponse::SqliteGetPagesOk(protocol::SqliteGetPagesOk { - pages: (10..76) - .map(|pgno| protocol::SqliteFetchedPage { - pgno, - bytes: Some(vec![(pgno % 251) as u8; 4096]), - }) - .collect(), - meta: sqlite_meta(8 * 1024 * 1024), - }); - let protocol = Arc::new(protocol); - let ctx = VfsContext::new( - "actor".to_string(), - runtime.handle().clone(), - SqliteTransport::from_mock(protocol.clone()), - protocol::SqliteStartupData { - generation: 7, - meta: protocol::SqliteMeta { - db_size_pages: 200, - ..sqlite_meta(8 * 1024 * 1024) - }, - preloaded_pages: Vec::new(), - }, - VfsConfig::from_optimization_flags(SqliteOptimizationFlags { - cache_hit_predictor_training: false, - ..SqliteOptimizationFlags::default() - }), - unsafe { std::mem::zeroed() }, - None, - ); - - ctx.resolve_pages(&[10], true) - .expect("first missing page should resolve"); - for pgno in 11..76 { - ctx.resolve_pages(&[pgno], true) - .expect("cache-hit page should resolve"); - } - ctx.resolve_pages(&[76], true) - .expect("next missing page should resolve"); - - let requests = protocol.get_pages_requests(); - assert_eq!(requests.len(), 2); - assert_eq!(requests[1].pgnos, vec![76]); - } - #[test] fn disabled_recent_page_hints_return_empty_snapshot() { let runtime = Builder::new_current_thread() @@ -4776,7 +4962,7 @@ mod tests { } #[test] - fn disabled_startup_preloaded_page_cache_fetches_on_first_read() { + fn target_page_cache_mode_fetches_startup_pages_on_first_read() { let runtime = Builder::new_current_thread() .enable_all() .build() @@ -4820,7 +5006,7 @@ mod tests { }], }, VfsConfig::from_optimization_flags(SqliteOptimizationFlags { - vfs_cache_startup_preloaded_pages: false, + vfs_page_cache_mode: SqliteVfsPageCacheMode::Target, ..SqliteOptimizationFlags::default() }), unsafe { std::mem::zeroed() }, @@ -4837,7 +5023,7 @@ mod tests { } #[test] - fn disabled_fetched_page_cache_re_fetches_target_reads() { + fn page_cache_off_re_fetches_target_reads() { let runtime = Builder::new_current_thread() .enable_all() .build() @@ -4881,7 +5067,8 @@ mod tests { preloaded_pages: Vec::new(), }, VfsConfig::from_optimization_flags(SqliteOptimizationFlags { - vfs_cache_fetched_pages: false, + vfs_page_cache_mode: SqliteVfsPageCacheMode::Off, + vfs_page_cache_capacity_pages: 0, ..SqliteOptimizationFlags::default() }), unsafe { std::mem::zeroed() }, @@ -4897,7 +5084,7 @@ mod tests { } #[test] - fn disabled_prefetched_page_cache_re_fetches_prefetch_hits() { + fn target_page_cache_mode_re_fetches_prefetch_hits() { let runtime = Builder::new_current_thread() .enable_all() .build() @@ -4947,7 +5134,7 @@ mod tests { preloaded_pages: Vec::new(), }, VfsConfig::from_optimization_flags(SqliteOptimizationFlags { - vfs_cache_prefetched_pages: false, + vfs_page_cache_mode: SqliteVfsPageCacheMode::Target, ..SqliteOptimizationFlags::default() }), unsafe { std::mem::zeroed() }, @@ -6341,52 +6528,1213 @@ mod tests { let db = harness.open_db(&runtime); assert!( - db._vfs.commit_atomic_count() > 0, + db.vfs.commit_atomic_count() > 0, "open_database should run the sqlite batch-atomic probe", ); } #[test] - fn direct_engine_keeps_head_txid_after_cache_miss_reads_between_commits() { + fn reader_vfs_file_rejects_mutating_callbacks() { let runtime = direct_runtime(); let harness = DirectEngineHarness::new(); - let engine = runtime.block_on(harness.open_engine()); - let db = harness.open_db_on_engine( - &runtime, - engine, - &harness.actor_id, - VfsConfig { - cache_capacity_pages: 2, - prefetch_depth: 0, - max_prefetch_bytes: 0, - ..VfsConfig::default() - }, - ); - sqlite_exec( - db.as_ptr(), - "CREATE TABLE items (id INTEGER PRIMARY KEY, value TEXT NOT NULL);", - ) - .expect("create table should succeed"); - sqlite_exec(db.as_ptr(), "CREATE INDEX items_value_idx ON items(value);") - .expect("create index should succeed"); - for i in 0..120 { - sqlite_step_statement( - db.as_ptr(), - &format!( - "INSERT INTO items (id, value) VALUES ({}, 'item-{i:03}');", - i + 1 - ), - ) - .expect("seed insert should succeed"); - } - + let db = harness.open_db(&runtime); let ctx = direct_vfs_ctx(&db); - let head_after_first_phase = ctx.state.read().head_txid; + let mut file = test_vfs_file(ctx, VfsFileRole::Reader); + let p_file = test_vfs_file_ptr(&mut file); + let bytes = vec![0x5a; DEFAULT_PAGE_SIZE]; - ctx.state.write().page_cache.invalidate_all(); assert_eq!( - sqlite_query_text( - db.as_ptr(), + unsafe { io_write(p_file, bytes.as_ptr().cast(), bytes.len() as c_int, 0) }, + SQLITE_IOERR_WRITE + ); + assert_eq!(unsafe { io_truncate(p_file, 0) }, SQLITE_IOERR_TRUNCATE); + { + let mut state = ctx.state.write(); + state.write_buffer.dirty.insert(1, vec![0x7a; DEFAULT_PAGE_SIZE]); + } + assert_eq!(unsafe { io_sync(p_file, 0) }, SQLITE_IOERR_FSYNC); + { + let mut state = ctx.state.write(); + state.write_buffer.dirty.clear(); + state.write_buffer.in_atomic_write = false; + } + assert_eq!( + unsafe { io_file_control(p_file, SQLITE_FCNTL_BEGIN_ATOMIC_WRITE, ptr::null_mut()) }, + SQLITE_READONLY + ); + assert!( + ctx.clone_last_error() + .expect("reader mutation should set last error") + .contains("reader sqlite VFS handle attempted mutating operation") + ); + } + + #[test] + fn writer_vfs_file_supports_write_callback() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let db = harness.open_db(&runtime); + let ctx = direct_vfs_ctx(&db); + let mut file = test_vfs_file(ctx, VfsFileRole::Writer); + let p_file = test_vfs_file_ptr(&mut file); + let bytes = vec![0x5a; DEFAULT_PAGE_SIZE]; + + assert_eq!( + unsafe { io_write(p_file, bytes.as_ptr().cast(), bytes.len() as c_int, 0) }, + SQLITE_OK + ); + { + let mut state = ctx.state.write(); + assert!(state.write_buffer.dirty.contains_key(&1)); + state.write_buffer.dirty.clear(); + } + } + + #[test] + fn vfs_open_sets_role_flags_and_denies_reader_aux_creation() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let db = harness.open_db(&runtime); + let ctx = direct_vfs_ctx(&db); + let actor = CString::new(harness.actor_id.as_str()).expect("actor id should be valid"); + let mut reader_out_flags = 0; + let mut reader_file = std::mem::MaybeUninit::::uninit(); + + let rc = unsafe { + vfs_open( + db.vfs.inner.vfs_ptr, + actor.as_ptr(), + reader_file.as_mut_ptr().cast(), + SQLITE_OPEN_MAIN_DB | SQLITE_OPEN_READONLY, + &mut reader_out_flags, + ) + }; + assert_eq!(rc, SQLITE_OK); + assert_ne!(reader_out_flags & SQLITE_OPEN_READONLY, 0); + assert_eq!(reader_out_flags & SQLITE_OPEN_READWRITE, 0); + let mut reader_file = unsafe { reader_file.assume_init() }; + assert_eq!(reader_file.role, VfsFileRole::Reader); + assert_eq!( + unsafe { io_close(test_vfs_file_ptr(&mut reader_file)) }, + SQLITE_OK + ); + + let aux_path = CString::new("reader-scratch").expect("aux path should be valid"); + let mut aux_out_flags = 0; + let mut aux_file = std::mem::MaybeUninit::::uninit(); + let rc = unsafe { + vfs_open( + db.vfs.inner.vfs_ptr, + aux_path.as_ptr(), + aux_file.as_mut_ptr().cast(), + SQLITE_OPEN_CREATE | SQLITE_OPEN_READONLY, + &mut aux_out_flags, + ) + }; + assert_eq!(rc, SQLITE_CANTOPEN); + assert!( + ctx.clone_last_error() + .expect("reader aux create should set last error") + .contains("auxiliary file creation") + ); + } + + #[test] + fn reader_owned_aux_files_reject_delete() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let db = harness.open_db(&runtime); + let ctx = direct_vfs_ctx(&db); + ctx.open_aux_file("reader-owned-journal", VfsFileRole::Reader); + let path = CString::new("reader-owned-journal").expect("aux path should be valid"); + + assert_eq!( + unsafe { vfs_delete(db.vfs.inner.vfs_ptr, path.as_ptr(), 0) }, + SQLITE_READONLY + ); + assert!(ctx.aux_file_exists("reader-owned-journal")); + } + + #[test] + fn connection_manager_admits_lazy_reads_up_to_limit() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let vfs_name = next_test_name("sqlite-manager-read-limit"); + let engine = runtime.block_on(harness.open_engine()); + let vfs = harness.open_vfs_on_engine_with_metrics( + &runtime, + engine, + &harness.actor_id, + &vfs_name, + VfsConfig::default(), + None, + ); + let manager = NativeConnectionManager::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + manager + .with_write_connection(|db| { + sqlite_exec( + db, + "CREATE TABLE manager_reads (id INTEGER PRIMARY KEY, value TEXT);", + ) + .map_err(anyhow::Error::msg) + }) + .await + .expect("setup write should succeed"); + + let first = manager + .acquire_read() + .await + .expect("first reader should open"); + let second = manager + .acquire_read() + .await + .expect("second reader should open"); + let snapshot = manager.snapshot().await; + assert_eq!(snapshot.mode, NativeConnectionManagerMode::ReadMode); + assert_eq!(snapshot.active_readers, 2); + assert_eq!(snapshot.open_readers, 2); + + let third_manager = manager.clone(); + let third = tokio::spawn(async move { + third_manager + .acquire_read() + .await + .expect("third reader should eventually open") + }); + tokio::task::yield_now().await; + assert!(!third.is_finished()); + + first.release().await; + let third = timeout(Duration::from_secs(1), third) + .await + .expect("third reader should acquire after a slot frees") + .expect("third reader task should not panic"); + second.release().await; + third.release().await; + manager.close().await.expect("manager close should succeed"); + }); + } + + #[test] + fn connection_manager_prefers_pending_writer_over_new_readers() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let vfs_name = next_test_name("sqlite-manager-writer-preference"); + let engine = runtime.block_on(harness.open_engine()); + let vfs = harness.open_vfs_on_engine_with_metrics( + &runtime, + engine, + &harness.actor_id, + &vfs_name, + VfsConfig::default(), + None, + ); + let manager = NativeConnectionManager::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + manager + .with_write_connection(|db| { + sqlite_exec( + db, + "CREATE TABLE manager_writer_preference (id INTEGER PRIMARY KEY);", + ) + .map_err(anyhow::Error::msg) + }) + .await + .expect("setup write should succeed"); + + let active_reader = manager + .acquire_read() + .await + .expect("reader should open before writer waits"); + let writer_manager = manager.clone(); + let (writer_acquired_tx, writer_acquired_rx) = oneshot::channel(); + let (release_writer_tx, release_writer_rx) = oneshot::channel(); + let writer = tokio::spawn(async move { + let writer = writer_manager + .acquire_write() + .await + .expect("writer should acquire after reader releases"); + let _ = writer_acquired_tx.send(()); + let _ = release_writer_rx.await; + writer.release().await; + }); + + manager + .wait_for_snapshot(|snapshot| snapshot.pending_writers == 1) + .await; + + let reader_manager = manager.clone(); + let pending_reader = tokio::spawn(async move { + reader_manager + .acquire_read() + .await + .expect("reader should acquire after writer releases") + }); + tokio::task::yield_now().await; + assert!(!pending_reader.is_finished()); + + active_reader.release().await; + timeout(Duration::from_secs(1), writer_acquired_rx) + .await + .expect("writer should acquire before pending reader") + .expect("writer acquired signal should send"); + let snapshot = manager.snapshot().await; + assert_eq!(snapshot.mode, NativeConnectionManagerMode::WriteMode); + assert_eq!(snapshot.active_readers, 0); + assert_eq!(snapshot.open_readers, 0); + assert!(snapshot.active_writer); + tokio::task::yield_now().await; + assert!(!pending_reader.is_finished()); + + let _ = release_writer_tx.send(()); + writer.await.expect("writer task should not panic"); + let pending_reader = timeout(Duration::from_secs(1), pending_reader) + .await + .expect("pending reader should acquire after writer releases") + .expect("pending reader task should not panic"); + pending_reader.release().await; + manager.close().await.expect("manager close should succeed"); + }); + } + + #[test] + fn connection_manager_keeps_begin_in_write_mode_until_commit() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let vfs_name = next_test_name("sqlite-manager-begin-gate"); + let engine = runtime.block_on(harness.open_engine()); + let vfs = harness.open_vfs_on_engine_with_metrics( + &runtime, + engine, + &harness.actor_id, + &vfs_name, + VfsConfig::default(), + None, + ); + let manager = NativeConnectionManager::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + manager + .with_write_connection(|db| { + sqlite_exec( + db, + "CREATE TABLE manager_begin_gate (id INTEGER PRIMARY KEY, value TEXT);", + ) + .map_err(anyhow::Error::msg) + }) + .await + .expect("setup write should succeed"); + + manager + .with_write_connection(|db| sqlite_exec(db, "BEGIN").map_err(anyhow::Error::msg)) + .await + .expect("begin should succeed"); + let snapshot = manager.snapshot().await; + assert_eq!(snapshot.mode, NativeConnectionManagerMode::WriteMode); + assert!(!snapshot.active_writer); + assert_eq!(snapshot.open_readers, 0); + + let reader_manager = manager.clone(); + let pending_reader = tokio::spawn(async move { + reader_manager + .acquire_read() + .await + .expect("reader should acquire after commit") + }); + tokio::task::yield_now().await; + assert!(!pending_reader.is_finished()); + + manager + .with_write_connection(|db| { + sqlite_exec( + db, + "INSERT INTO manager_begin_gate (id, value) VALUES (1, 'committed');", + ) + .map_err(anyhow::Error::msg) + }) + .await + .expect("transactional insert should succeed"); + tokio::task::yield_now().await; + assert!(!pending_reader.is_finished()); + + manager + .with_write_connection(|db| sqlite_exec(db, "COMMIT").map_err(anyhow::Error::msg)) + .await + .expect("commit should succeed"); + let pending_reader = timeout(Duration::from_secs(1), pending_reader) + .await + .expect("reader should acquire after commit") + .expect("reader task should not panic"); + assert_eq!( + sqlite_query_text( + pending_reader.as_ptr(), + "SELECT value FROM manager_begin_gate WHERE id = 1;", + ) + .expect("reader should see committed write"), + "committed" + ); + pending_reader.release().await; + manager.close().await.expect("manager close should succeed"); + }); + } + + #[test] + fn connection_manager_keeps_savepoint_in_write_mode_until_rollback() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let vfs_name = next_test_name("sqlite-manager-savepoint-gate"); + let engine = runtime.block_on(harness.open_engine()); + let vfs = harness.open_vfs_on_engine_with_metrics( + &runtime, + engine, + &harness.actor_id, + &vfs_name, + VfsConfig::default(), + None, + ); + let manager = NativeConnectionManager::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + manager + .with_write_connection(|db| { + sqlite_exec( + db, + "CREATE TABLE manager_savepoint_gate (id INTEGER PRIMARY KEY);", + ) + .map_err(anyhow::Error::msg) + }) + .await + .expect("setup write should succeed"); + + manager + .with_write_connection(|db| { + sqlite_exec(db, "SAVEPOINT manager_gate") + .map_err(anyhow::Error::msg) + }) + .await + .expect("savepoint should succeed"); + let snapshot = manager.snapshot().await; + assert_eq!(snapshot.mode, NativeConnectionManagerMode::WriteMode); + assert!(!snapshot.active_writer); + + let reader_manager = manager.clone(); + let pending_reader = tokio::spawn(async move { + reader_manager + .acquire_read() + .await + .expect("reader should acquire after rollback") + }); + tokio::task::yield_now().await; + assert!(!pending_reader.is_finished()); + + manager + .with_write_connection(|db| { + sqlite_exec(db, "ROLLBACK").map_err(anyhow::Error::msg) + }) + .await + .expect("rollback should succeed"); + let pending_reader = timeout(Duration::from_secs(1), pending_reader) + .await + .expect("reader should acquire after rollback") + .expect("reader task should not panic"); + pending_reader.release().await; + manager.close().await.expect("manager close should succeed"); + }); + } + + #[test] + fn native_database_routes_concurrent_readonly_queries_to_multiple_readers() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let engine = runtime.block_on(harness.open_engine()); + let startup = runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + let vfs = SqliteVfs::register_with_transport( + &next_test_name("sqlite-read-routing-vfs"), + SqliteTransport::from_direct(engine), + harness.actor_id.clone(), + runtime.handle().clone(), + startup, + VfsConfig::default(), + None, + ) + .expect("vfs should register"); + let db = NativeDatabaseHandle::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + db.exec( + "CREATE TABLE read_routing (id INTEGER PRIMARY KEY, value TEXT NOT NULL); + INSERT INTO read_routing (id, value) VALUES (1, 'alpha'), (2, 'bravo');" + .to_string(), + ) + .await + .expect("setup write should succeed"); + + let held_reader = db + .manager() + .acquire_read() + .await + .expect("held reader should open"); + let result = timeout( + Duration::from_secs(1), + db.query( + "SELECT value FROM read_routing WHERE id = 2;".to_string(), + None, + ), + ) + .await + .expect("read-only query should not wait for write mode") + .expect("read-only query should succeed"); + + let snapshot = db.manager().snapshot().await; + assert_eq!(snapshot.active_readers, 1); + assert_eq!(snapshot.idle_readers, 1); + assert_eq!(snapshot.open_readers, 2); + assert!(!snapshot.active_writer); + assert_eq!(result.rows[0][0], ColumnValue::Text("bravo".to_string())); + + held_reader.release().await; + db.close().await.expect("database close should succeed"); + }); + } + + #[test] + fn native_database_reuses_idle_reader_for_readonly_query() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let engine = runtime.block_on(harness.open_engine()); + let startup = runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + let vfs = SqliteVfs::register_with_transport( + &next_test_name("sqlite-read-reuse-vfs"), + SqliteTransport::from_direct(engine), + harness.actor_id.clone(), + runtime.handle().clone(), + startup, + VfsConfig::default(), + None, + ) + .expect("vfs should register"); + let db = NativeDatabaseHandle::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + db.exec( + "CREATE TABLE read_reuse (id INTEGER PRIMARY KEY, value TEXT NOT NULL); + INSERT INTO read_reuse (id, value) VALUES (1, 'alpha');" + .to_string(), + ) + .await + .expect("setup write should succeed"); + + db.query( + "SELECT value FROM read_reuse WHERE id = 1;".to_string(), + None, + ) + .await + .expect("first read should succeed"); + let snapshot = db.manager().snapshot().await; + assert_eq!(snapshot.idle_readers, 1); + assert_eq!(snapshot.open_readers, 1); + + db.query( + "SELECT value FROM read_reuse WHERE id = 1;".to_string(), + None, + ) + .await + .expect("second read should succeed"); + let snapshot = db.manager().snapshot().await; + assert_eq!(snapshot.idle_readers, 1); + assert_eq!(snapshot.open_readers, 1); + + db.close().await.expect("database close should succeed"); + }); + } + + #[test] + fn disabled_read_pool_routes_select_through_single_writer() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let engine = runtime.block_on(harness.open_engine()); + let startup = runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + let vfs = SqliteVfs::register_with_transport( + &next_test_name("sqlite-read-pool-disabled-vfs"), + SqliteTransport::from_direct(engine), + harness.actor_id.clone(), + runtime.handle().clone(), + startup, + VfsConfig::default(), + None, + ) + .expect("vfs should register"); + let db = NativeDatabaseHandle::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { + read_pool_enabled: false, + ..NativeConnectionManagerConfig::default() + }, + ); + + runtime.block_on(async { + db.exec( + "CREATE TABLE read_pool_disabled (id INTEGER PRIMARY KEY, value TEXT NOT NULL); + INSERT INTO read_pool_disabled (id, value) VALUES (1, 'alpha');" + .to_string(), + ) + .await + .expect("setup write should succeed"); + + let result = db + .execute( + "SELECT value FROM read_pool_disabled WHERE id = 1;".to_string(), + None, + ) + .await + .expect("disabled read pool select should use writer"); + assert_eq!(result.route, ExecuteRoute::WriteFallback); + assert_eq!(result.rows[0][0], ColumnValue::Text("alpha".to_string())); + + let snapshot = db.manager().snapshot().await; + assert_eq!(snapshot.idle_readers, 0); + assert_eq!(snapshot.open_readers, 0); + assert_eq!(snapshot.mode, NativeConnectionManagerMode::WriteMode); + + db.close().await.expect("database close should succeed"); + }); + } + + #[test] + fn native_database_reader_authorizer_denies_unsafe_functions() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let engine = runtime.block_on(harness.open_engine()); + let startup = runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + let vfs = SqliteVfs::register_with_transport( + &next_test_name("sqlite-reader-authorizer-vfs"), + SqliteTransport::from_direct(engine), + harness.actor_id.clone(), + runtime.handle().clone(), + startup, + VfsConfig::default(), + None, + ) + .expect("vfs should register"); + let db = NativeDatabaseHandle::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + let err = db + .query("SELECT load_extension('not-present');".to_string(), None) + .await + .expect_err("reader authorizer should reject unsafe function"); + assert!( + err.to_string().contains("not authorized"), + "unexpected error: {err:#}" + ); + db.close().await.expect("database close should succeed"); + }); + } + + #[test] + fn native_database_raw_transaction_keeps_write_mode_across_awaited_user_code() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let engine = runtime.block_on(harness.open_engine()); + let startup = runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + let vfs = SqliteVfs::register_with_transport( + &next_test_name("sqlite-native-raw-tx-vfs"), + SqliteTransport::from_direct(engine), + harness.actor_id.clone(), + runtime.handle().clone(), + startup, + VfsConfig::default(), + None, + ) + .expect("vfs should register"); + let db = NativeDatabaseHandle::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + db.exec( + "CREATE TABLE native_raw_tx (id INTEGER PRIMARY KEY, value TEXT NOT NULL);" + .to_string(), + ) + .await + .expect("setup write should succeed"); + db.execute("BEGIN".to_string(), None) + .await + .expect("raw begin should succeed"); + tokio::task::yield_now().await; + let in_tx = db.manager().snapshot().await; + assert_eq!(in_tx.mode, NativeConnectionManagerMode::WriteMode); + assert!(!in_tx.active_writer); + assert_eq!(in_tx.open_readers, 0); + + let reader_db = db.clone(); + let pending_reader = tokio::spawn(async move { + reader_db + .query("SELECT COUNT(*) FROM native_raw_tx;".to_string(), None) + .await + }); + tokio::task::yield_now().await; + assert!(!pending_reader.is_finished()); + + db.execute( + "INSERT INTO native_raw_tx (id, value) VALUES (1, 'committed')".to_string(), + None, + ) + .await + .expect("transactional write should reuse writer"); + tokio::task::yield_now().await; + assert!(!pending_reader.is_finished()); + + db.execute("COMMIT".to_string(), None) + .await + .expect("commit should succeed"); + let read_result = timeout(Duration::from_secs(1), pending_reader) + .await + .expect("reader should run after commit") + .expect("reader task should not panic") + .expect("reader should succeed"); + assert_eq!(read_result.rows[0][0], ColumnValue::Integer(1)); + let after_commit = db.manager().snapshot().await; + assert_ne!(after_commit.mode, NativeConnectionManagerMode::WriteMode); + db.close().await.expect("database close should succeed"); + }); + } + + #[test] + fn native_database_execute_and_query_share_one_routing_gate() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let engine = runtime.block_on(harness.open_engine()); + let startup = runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + let vfs = SqliteVfs::register_with_transport( + &next_test_name("sqlite-native-shared-gate-vfs"), + SqliteTransport::from_direct(engine), + harness.actor_id.clone(), + runtime.handle().clone(), + startup, + VfsConfig::default(), + None, + ) + .expect("vfs should register"); + let db = NativeDatabaseHandle::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + db.exec( + "CREATE TABLE shared_gate (id INTEGER PRIMARY KEY, value TEXT NOT NULL);" + .to_string(), + ) + .await + .expect("setup write should succeed"); + let held_reader = db + .manager() + .acquire_read() + .await + .expect("held user reader should open"); + + let inspector_db = db.clone(); + let inspector_execute = tokio::spawn(async move { + inspector_db + .execute( + "INSERT INTO shared_gate (id, value) VALUES (1, 'inspector')".to_string(), + None, + ) + .await + }); + db.manager() + .wait_for_snapshot(|snapshot| snapshot.pending_writers == 1) + .await; + + let user_db = db.clone(); + let user_query = tokio::spawn(async move { + user_db + .query("SELECT value FROM shared_gate WHERE id = 1;".to_string(), None) + .await + }); + tokio::task::yield_now().await; + assert!(!inspector_execute.is_finished()); + assert!(!user_query.is_finished()); + + held_reader.release().await; + let execute_result = timeout(Duration::from_secs(1), inspector_execute) + .await + .expect("inspector-style execute should complete after reader releases") + .expect("execute task should not panic") + .expect("inspector-style execute should succeed"); + assert_eq!(execute_result.route, ExecuteRoute::Write); + + let query_result = timeout(Duration::from_secs(1), user_query) + .await + .expect("user query should complete after writer") + .expect("query task should not panic") + .expect("user query should succeed"); + assert_eq!( + query_result.rows[0][0], + ColumnValue::Text("inspector".to_string()) + ); + let snapshot = db.manager().snapshot().await; + assert_eq!(snapshot.pending_writers, 0); + assert!(!snapshot.active_writer); + db.close().await.expect("database close should succeed"); + }); + } + + #[test] + fn native_database_reader_fence_mismatch_marks_shared_vfs_dead() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let engine = runtime.block_on(harness.open_engine()); + let startup = runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + let vfs = SqliteVfs::register_with_transport( + &next_test_name("sqlite-native-reader-fence-vfs"), + SqliteTransport::from_direct(Arc::clone(&engine)), + harness.actor_id.clone(), + runtime.handle().clone(), + startup, + VfsConfig::default(), + None, + ) + .expect("vfs should register"); + let vfs_for_assertion = vfs.clone(); + let db = NativeDatabaseHandle::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + db.exec( + "CREATE TABLE reader_fence (id INTEGER PRIMARY KEY, value TEXT NOT NULL); + INSERT INTO reader_fence (id, value) VALUES (1, 'before-replacement');" + .to_string(), + ) + .await + .expect("setup write should succeed"); + { + let mut state = direct_vfs_handle_ctx(&vfs_for_assertion).state.write(); + state.page_cache.invalidate_all(); + state.protected_page_cache.clear(); + } + let _replacement_startup = harness.startup_data_for(&harness.actor_id, &engine).await; + + let err = db + .query( + "SELECT value FROM reader_fence WHERE id = 1;".to_string(), + None, + ) + .await + .expect_err("stale-generation reader should fail closed"); + assert!( + err.to_string().contains("failed to open sqlite read connection") + || err.to_string().contains("I/O") + || err.to_string().contains("disk I/O"), + "unexpected reader fence error: {err:#}", + ); + assert!( + direct_vfs_handle_ctx(&vfs_for_assertion).is_dead(), + "reader fence mismatch should mark the shared VFS dead", + ); + + let later_err = db + .execute("SELECT COUNT(*) FROM reader_fence;".to_string(), None) + .await + .expect_err("later database work should fail after VFS is dead"); + assert!( + later_err.to_string().contains("lost its fence") + || later_err.to_string().contains("failed to open sqlite read connection") + || later_err.to_string().contains("I/O") + || later_err.to_string().contains("disk I/O"), + "unexpected post-fence error: {later_err:#}", + ); + db.close().await.expect("database close should succeed"); + }); + } + + #[test] + fn connection_manager_close_waits_for_active_work_then_unregisters_vfs() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let vfs_name = next_test_name("sqlite-manager-close"); + let engine = runtime.block_on(harness.open_engine()); + let vfs = harness.open_vfs_on_engine_with_metrics( + &runtime, + engine, + &harness.actor_id, + &vfs_name, + VfsConfig::default(), + None, + ); + let manager = NativeConnectionManager::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 1, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + manager + .with_write_connection(|db| { + sqlite_exec( + db, + "CREATE TABLE manager_close (id INTEGER PRIMARY KEY);", + ) + .map_err(anyhow::Error::msg) + }) + .await + .expect("setup write should succeed"); + + assert!(sqlite_vfs_registered(&vfs_name)); + let reader = manager + .acquire_read() + .await + .expect("reader should open before close"); + let closing_manager = manager.clone(); + let close_task = tokio::spawn(async move { + closing_manager + .close() + .await + .expect("manager close should succeed"); + }); + manager + .wait_for_snapshot(|snapshot| { + snapshot.mode == NativeConnectionManagerMode::Closing + }) + .await; + + let err = match manager.acquire_read().await { + Ok(reader) => { + reader.release().await; + panic!("new reads should be rejected while closing"); + } + Err(err) => err, + }; + assert!(err.to_string().contains("closing")); + tokio::task::yield_now().await; + assert!(!close_task.is_finished()); + + reader.release().await; + timeout(Duration::from_secs(1), close_task) + .await + .expect("close should finish after active reader releases") + .expect("close task should not panic"); + assert!(!sqlite_vfs_registered(&vfs_name)); + }); + } + + #[test] + fn connection_manager_sleep_destroy_close_drains_readers_and_rejects_new_work() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let vfs_name = next_test_name("sqlite-manager-shutdown-close"); + let engine = runtime.block_on(harness.open_engine()); + let vfs = harness.open_vfs_on_engine_with_metrics( + &runtime, + engine, + &harness.actor_id, + &vfs_name, + VfsConfig::default(), + None, + ); + let manager = NativeConnectionManager::new( + vfs, + harness.actor_id.clone(), + NativeConnectionManagerConfig { max_readers: 2, ..NativeConnectionManagerConfig::default() }, + ); + + runtime.block_on(async { + manager + .with_write_connection(|db| { + sqlite_exec( + db, + "CREATE TABLE manager_shutdown_close (id INTEGER PRIMARY KEY);", + ) + .map_err(anyhow::Error::msg) + }) + .await + .expect("setup write should succeed"); + + let active_reader = manager + .acquire_read() + .await + .expect("active reader should open before shutdown"); + let idle_reader = manager + .acquire_read() + .await + .expect("idle reader should open before shutdown"); + idle_reader.release().await; + let before_close = manager.snapshot().await; + assert_eq!(before_close.active_readers, 1); + assert_eq!(before_close.idle_readers, 1); + assert_eq!(before_close.open_readers, 2); + + let closing_manager = manager.clone(); + let close_task = tokio::spawn(async move { + closing_manager + .close() + .await + .expect("manager close should succeed"); + }); + let closing = manager + .wait_for_snapshot(|snapshot| { + snapshot.mode == NativeConnectionManagerMode::Closing + && snapshot.active_readers == 1 + && snapshot.idle_readers == 0 + && snapshot.open_readers == 1 + }) + .await; + assert!(!closing.active_writer); + + let read_err = match manager.acquire_read().await { + Ok(reader) => { + reader.release().await; + panic!("new reads should be rejected during actor shutdown"); + } + Err(err) => err, + }; + assert!(read_err.to_string().contains("closing")); + let write_err = match manager.acquire_write().await { + Ok(writer) => { + writer.release().await; + panic!("new writes should be rejected during actor shutdown"); + } + Err(err) => err, + }; + assert!(write_err.to_string().contains("closing")); + assert!(!close_task.is_finished()); + + active_reader.release().await; + timeout(Duration::from_secs(1), close_task) + .await + .expect("close should finish after active reader releases") + .expect("close task should not panic"); + let closed = manager.snapshot().await; + assert_eq!(closed.mode, NativeConnectionManagerMode::Closed); + assert_eq!(closed.active_readers, 0); + assert_eq!(closed.idle_readers, 0); + assert_eq!(closed.open_readers, 0); + assert!(!sqlite_vfs_registered(&vfs_name)); + }); + } + + #[test] + fn native_vfs_handle_opens_multiple_connections_against_one_context() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let db = harness.open_db(&runtime); + let second_connection = open_connection( + db.vfs_handle(), + &harness.actor_id, + SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, + ) + .expect("second sqlite connection should open"); + + assert_ne!(db.as_ptr(), second_connection.as_ptr()); + assert!( + ptr::eq(direct_vfs_ctx(&db), direct_connection_vfs_ctx(&second_connection)), + "connections opened from one NativeVfsHandle should share one VfsContext", + ); + + sqlite_exec( + db.as_ptr(), + "CREATE TABLE shared_connections (id INTEGER PRIMARY KEY, value TEXT NOT NULL);", + ) + .expect("create table should succeed"); + sqlite_exec( + db.as_ptr(), + "INSERT INTO shared_connections (id, value) VALUES (1, 'visible');", + ) + .expect("insert should succeed"); + assert_eq!( + sqlite_query_text( + second_connection.as_ptr(), + "SELECT value FROM shared_connections WHERE id = 1;", + ) + .expect("second connection should read through shared VFS"), + "visible" + ); + + drop(db); + assert_eq!( + sqlite_query_text( + second_connection.as_ptr(), + "SELECT value FROM shared_connections WHERE id = 1;", + ) + .expect("connection should keep shared VFS alive after manager drop"), + "visible" + ); + } + + #[test] + fn native_vfs_handle_unregisters_after_last_connection_closes() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let engine = runtime.block_on(harness.open_engine()); + let name = next_test_name("sqlite-shared-vfs"); + let startup = runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + let vfs = SqliteVfs::register_with_transport( + &name, + SqliteTransport::from_direct(Arc::clone(&engine)), + harness.actor_id.clone(), + runtime.handle().clone(), + startup, + VfsConfig::default(), + None, + ) + .expect("vfs should register"); + let connection = open_connection( + vfs.clone(), + &harness.actor_id, + SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, + ) + .expect("sqlite connection should open"); + assert!(sqlite_vfs_registered(&name)); + + drop(vfs); + assert!( + sqlite_vfs_registered(&name), + "an open connection should keep the VFS registered", + ); + + drop(connection); + assert!( + !sqlite_vfs_registered(&name), + "VFS should unregister after the last connection closes", + ); + let replacement_startup = + runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + SqliteVfs::register_with_transport( + &name, + SqliteTransport::from_direct(engine), + harness.actor_id.clone(), + runtime.handle().clone(), + replacement_startup, + VfsConfig::default(), + None, + ) + .expect("VFS name should be reusable after the last connection closes"); + } + + #[test] + fn actor_replacement_generation_uses_distinct_vfs_registration_name() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let engine = runtime.block_on(harness.open_engine()); + let first_startup = runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + let first_name = vfs_name_for_actor_database(&harness.actor_id, first_startup.generation); + let first_vfs = SqliteVfs::register_with_transport( + &first_name, + SqliteTransport::from_direct(Arc::clone(&engine)), + harness.actor_id.clone(), + runtime.handle().clone(), + first_startup, + VfsConfig::default(), + None, + ) + .expect("first generation VFS should register"); + assert!(sqlite_vfs_registered(&first_name)); + + let replacement_startup = + runtime.block_on(harness.startup_data_for(&harness.actor_id, &engine)); + let replacement_name = + vfs_name_for_actor_database(&harness.actor_id, replacement_startup.generation); + assert_ne!(first_name, replacement_name); + let replacement_vfs = SqliteVfs::register_with_transport( + &replacement_name, + SqliteTransport::from_direct(engine), + harness.actor_id.clone(), + runtime.handle().clone(), + replacement_startup, + VfsConfig::default(), + None, + ) + .expect("replacement generation VFS should register beside stale generation"); + + assert!(sqlite_vfs_registered(&first_name)); + assert!(sqlite_vfs_registered(&replacement_name)); + drop(first_vfs); + assert!(!sqlite_vfs_registered(&first_name)); + assert!(sqlite_vfs_registered(&replacement_name)); + drop(replacement_vfs); + assert!(!sqlite_vfs_registered(&replacement_name)); + } + + #[test] + fn direct_engine_keeps_head_txid_after_cache_miss_reads_between_commits() { + let runtime = direct_runtime(); + let harness = DirectEngineHarness::new(); + let engine = runtime.block_on(harness.open_engine()); + let db = harness.open_db_on_engine( + &runtime, + engine, + &harness.actor_id, + VfsConfig { + cache_capacity_pages: 2, + prefetch_depth: 0, + max_prefetch_bytes: 0, + ..VfsConfig::default() + }, + ); + sqlite_exec( + db.as_ptr(), + "CREATE TABLE items (id INTEGER PRIMARY KEY, value TEXT NOT NULL);", + ) + .expect("create table should succeed"); + sqlite_exec(db.as_ptr(), "CREATE INDEX items_value_idx ON items(value);") + .expect("create index should succeed"); + for i in 0..120 { + sqlite_step_statement( + db.as_ptr(), + &format!( + "INSERT INTO items (id, value) VALUES ({}, 'item-{i:03}');", + i + 1 + ), + ) + .expect("seed insert should succeed"); + } + + let ctx = direct_vfs_ctx(&db); + let head_after_first_phase = ctx.state.read().head_txid; + + ctx.state.write().page_cache.invalidate_all(); + assert_eq!( + sqlite_query_text( + db.as_ptr(), "SELECT value FROM items WHERE value = 'item-091';", ) .expect("cache-miss read should succeed"), @@ -6445,7 +7793,8 @@ mod tests { let pages = runtime .block_on(engine.get_pages(&harness.actor_id, startup.generation, vec![1, 1024, 2300])) - .expect("pages should read back after slow-path commit"); + .expect("pages should read back after slow-path commit") + .pages; let expected_page_1 = vec![1u8; 4096]; let expected_page_1024 = vec![(1024 % 251) as u8; 4096]; let expected_page_2300 = vec![(2300 % 251) as u8; 4096]; @@ -7024,11 +8373,11 @@ mod tests { let db = harness.open_db(&runtime); let ctx = direct_vfs_ctx(&db); - ctx.open_aux_file("actor-journal"); + ctx.open_aux_file("actor-journal", VfsFileRole::Writer); ctx.fail_next_aux_delete("InjectedAuxDeleteError: delete failed"); let path = CString::new("actor-journal").expect("cstring should build"); - let rc = unsafe { vfs_delete(db._vfs.vfs_ptr, path.as_ptr(), 0) }; + let rc = unsafe { vfs_delete(db.vfs.inner.vfs_ptr, path.as_ptr(), 0) }; assert_eq!(rc, SQLITE_IOERR_DELETE); assert_eq!( db.take_last_kv_error().as_deref(), @@ -7499,15 +8848,20 @@ mod tests { None, ); - let first = ctx.open_aux_file("actor-journal"); + let first = ctx.open_aux_file("actor-journal", VfsFileRole::Writer); first.bytes.lock().extend_from_slice(&[1, 2, 3, 4]); - let second = ctx.open_aux_file("actor-journal"); + let second = ctx.open_aux_file("actor-journal", VfsFileRole::Writer); assert_eq!(*second.bytes.lock(), vec![1, 2, 3, 4]); assert!(ctx.aux_file_exists("actor-journal")); ctx.delete_aux_file("actor-journal"); assert!(!ctx.aux_file_exists("actor-journal")); - assert!(ctx.open_aux_file("actor-journal").bytes.lock().is_empty()); + assert!( + ctx.open_aux_file("actor-journal", VfsFileRole::Writer) + .bytes + .lock() + .is_empty() + ); } #[test] @@ -7553,7 +8907,7 @@ mod tests { let barrier = barrier.clone(); thread::spawn(move || { barrier.wait(); - ctx.open_aux_file("actor-journal") + ctx.open_aux_file("actor-journal", VfsFileRole::Writer) }) }; let second = { @@ -7561,7 +8915,7 @@ mod tests { let barrier = barrier.clone(); thread::spawn(move || { barrier.wait(); - ctx.open_aux_file("actor-journal") + ctx.open_aux_file("actor-journal", VfsFileRole::Writer) }) }; diff --git a/rivetkit-rust/packages/rivetkit-sqlite/tests/statement_classification.rs b/rivetkit-rust/packages/rivetkit-sqlite/tests/statement_classification.rs new file mode 100644 index 0000000000..244f27f479 --- /dev/null +++ b/rivetkit-rust/packages/rivetkit-sqlite/tests/statement_classification.rs @@ -0,0 +1,175 @@ +use std::ffi::CString; +use std::ptr; + +use libsqlite3_sys::{SQLITE_OK, sqlite3, sqlite3_close, sqlite3_open}; +use rivetkit_sqlite::query::{ + StatementAuthorizerActionKind, classify_statement, exec_statements, +}; + +struct MemoryDb(*mut sqlite3); + +impl MemoryDb { + fn open() -> Self { + let name = CString::new(":memory:").unwrap(); + let mut db = ptr::null_mut(); + let rc = unsafe { sqlite3_open(name.as_ptr(), &mut db) }; + assert_eq!(rc, SQLITE_OK); + Self(db) + } + + fn as_ptr(&self) -> *mut sqlite3 { + self.0 + } +} + +impl Drop for MemoryDb { + fn drop(&mut self) { + unsafe { + sqlite3_close(self.0); + } + } +} + +#[test] +fn select_is_reader_eligible() { + let db = MemoryDb::open(); + let classification = classify_statement(db.as_ptr(), "SELECT 1 AS value").unwrap(); + + assert!(classification.has_statement); + assert!(classification.sqlite_readonly); + assert!(!classification.has_trailing_sql); + assert!(classification.reader_eligible()); + assert!( + classification + .authorizer + .actions + .iter() + .any(|action| action.kind == StatementAuthorizerActionKind::Select) + ); +} + +#[test] +fn readonly_pragma_is_reader_eligible_and_captures_pragma_usage() { + let db = MemoryDb::open(); + let classification = classify_statement(db.as_ptr(), "PRAGMA user_version").unwrap(); + + assert!(classification.sqlite_readonly); + assert!(classification.reader_eligible()); + assert!(classification.authorizer.pragma_usage); +} + +#[test] +fn mutating_pragma_is_not_reader_eligible() { + let db = MemoryDb::open(); + let classification = classify_statement(db.as_ptr(), "PRAGMA user_version = 7").unwrap(); + + assert!(!classification.sqlite_readonly); + assert!(!classification.reader_eligible()); + assert!(classification.authorizer.pragma_usage); +} + +#[test] +fn insert_returning_is_a_write_operation() { + let db = MemoryDb::open(); + exec_statements( + db.as_ptr(), + "CREATE TABLE items(id INTEGER PRIMARY KEY, label TEXT);", + ) + .unwrap(); + + let classification = classify_statement( + db.as_ptr(), + "INSERT INTO items(label) VALUES ('alpha') RETURNING id", + ) + .unwrap(); + + assert!(!classification.sqlite_readonly); + assert!(!classification.reader_eligible()); + assert!(classification.authorizer.write_operations); + assert!( + classification + .authorizer + .actions + .iter() + .any(|action| action.kind == StatementAuthorizerActionKind::Insert) + ); +} + +#[test] +fn cte_insert_returning_is_a_write_operation() { + let db = MemoryDb::open(); + exec_statements(db.as_ptr(), "CREATE TABLE items(value INTEGER);").unwrap(); + + let classification = classify_statement( + db.as_ptr(), + "WITH source(value) AS (VALUES (1)) INSERT INTO items(value) SELECT value FROM source RETURNING value", + ) + .unwrap(); + + assert!(!classification.sqlite_readonly); + assert!(!classification.reader_eligible()); + assert!(classification.authorizer.write_operations); +} + +#[test] +fn vacuum_is_not_reader_eligible() { + let db = MemoryDb::open(); + let classification = classify_statement(db.as_ptr(), "VACUUM").unwrap(); + + assert!(!classification.sqlite_readonly); + assert!(!classification.reader_eligible()); +} + +#[test] +fn attach_is_not_reader_eligible_and_captures_attach() { + let db = MemoryDb::open(); + let classification = + classify_statement(db.as_ptr(), "ATTACH DATABASE ':memory:' AS attached").unwrap(); + + assert!(!classification.reader_eligible()); + assert!(classification.authorizer.attach); +} + +#[test] +fn begin_is_not_reader_eligible_and_captures_transaction_control() { + let db = MemoryDb::open(); + let classification = classify_statement(db.as_ptr(), "BEGIN").unwrap(); + + assert!(classification.sqlite_readonly); + assert!(!classification.reader_eligible()); + assert!(classification.authorizer.transaction_control); + assert!( + classification + .authorizer + .actions + .iter() + .any(|action| action.kind == StatementAuthorizerActionKind::Transaction) + ); +} + +#[test] +fn savepoint_is_not_reader_eligible_and_captures_transaction_control() { + let db = MemoryDb::open(); + let classification = classify_statement(db.as_ptr(), "SAVEPOINT manual").unwrap(); + + assert!(classification.sqlite_readonly); + assert!(!classification.reader_eligible()); + assert!(classification.authorizer.transaction_control); + assert!( + classification + .authorizer + .actions + .iter() + .any(|action| action.kind == StatementAuthorizerActionKind::Savepoint) + ); +} + +#[test] +fn multi_statement_sql_is_not_reader_eligible() { + let db = MemoryDb::open(); + let classification = classify_statement(db.as_ptr(), "SELECT 1; SELECT 2").unwrap(); + + assert!(classification.sqlite_readonly); + assert!(classification.has_trailing_sql); + assert!(!classification.reader_eligible()); +} diff --git a/rivetkit-typescript/packages/rivetkit-napi/index.d.ts b/rivetkit-typescript/packages/rivetkit-napi/index.d.ts index 8adc0b175e..7b4e83b842 100644 --- a/rivetkit-typescript/packages/rivetkit-napi/index.d.ts +++ b/rivetkit-typescript/packages/rivetkit-napi/index.d.ts @@ -92,6 +92,13 @@ export interface QueryResult { columns: Array rows: Array> } +export interface NativeExecuteResult { + columns: Array + rows: Array> + changes: number + lastInsertRowId?: number + route: string +} export interface JsQueueNextOptions { names?: Array timeoutMs?: number @@ -240,6 +247,8 @@ export declare class JsNativeDatabase { takeLastKvError(): string | null run(sql: string, params?: Array | undefined | null): Promise query(sql: string, params?: Array | undefined | null): Promise + execute(sql: string, params?: Array | undefined | null): Promise + executeWrite(sql: string, params?: Array | undefined | null): Promise exec(sql: string): Promise close(): Promise } diff --git a/rivetkit-typescript/packages/rivetkit-napi/src/database.rs b/rivetkit-typescript/packages/rivetkit-napi/src/database.rs index 1d1ad8c261..ad17ecdf1a 100644 --- a/rivetkit-typescript/packages/rivetkit-napi/src/database.rs +++ b/rivetkit-typescript/packages/rivetkit-napi/src/database.rs @@ -1,7 +1,8 @@ use napi::bindgen_prelude::Buffer; use napi_derive::napi; use rivetkit_core::sqlite::{ - BindParam, ColumnValue, QueryResult as CoreQueryResult, SqliteDb as CoreSqliteDb, + BindParam, ColumnValue, ExecuteResult as CoreExecuteResult, ExecuteRoute, + QueryResult as CoreQueryResult, SqliteDb as CoreSqliteDb, }; use crate::{NapiInvalidArgument, napi_anyhow_error}; @@ -53,6 +54,15 @@ pub struct QueryResult { pub rows: Vec>, } +#[napi(object)] +pub struct NativeExecuteResult { + pub columns: Vec, + pub rows: Vec>, + pub changes: i64, + pub last_insert_row_id: Option, + pub route: String, +} + #[napi] impl JsNativeDatabase { #[napi] @@ -92,6 +102,36 @@ impl JsNativeDatabase { Ok(core_query_result_to_js(result)) } + #[napi] + pub async fn execute( + &self, + sql: String, + params: Option>, + ) -> napi::Result { + let params = params.map(js_bind_params_to_core).transpose()?; + let result = self + .db + .execute(sql, params) + .await + .map_err(crate::napi_anyhow_error)?; + Ok(core_execute_result_to_js(result)) + } + + #[napi] + pub async fn execute_write( + &self, + sql: String, + params: Option>, + ) -> napi::Result { + let params = params.map(js_bind_params_to_core).transpose()?; + let result = self + .db + .execute_write(sql, params) + .await + .map_err(crate::napi_anyhow_error)?; + Ok(core_execute_result_to_js(result)) + } + #[napi] pub async fn exec(&self, sql: String) -> napi::Result { let result = self.db.exec(sql).await.map_err(crate::napi_anyhow_error)?; @@ -140,6 +180,28 @@ fn core_query_result_to_js(result: CoreQueryResult) -> QueryResult { } } +fn core_execute_result_to_js(result: CoreExecuteResult) -> NativeExecuteResult { + NativeExecuteResult { + columns: result.columns, + rows: result + .rows + .into_iter() + .map(|row| row.into_iter().map(column_value_to_json).collect()) + .collect(), + changes: result.changes, + last_insert_row_id: result.last_insert_row_id, + route: execute_route_to_js(result.route), + } +} + +fn execute_route_to_js(route: ExecuteRoute) -> String { + match route { + ExecuteRoute::Read => "read".to_owned(), + ExecuteRoute::Write => "write".to_owned(), + ExecuteRoute::WriteFallback => "writeFallback".to_owned(), + } +} + fn column_value_to_json(value: ColumnValue) -> serde_json::Value { match value { ColumnValue::Null => serde_json::Value::Null, diff --git a/rivetkit-typescript/packages/rivetkit/src/common/database/config.ts b/rivetkit-typescript/packages/rivetkit/src/common/database/config.ts index e8324239e6..7a20f452cb 100644 --- a/rivetkit-typescript/packages/rivetkit/src/common/database/config.ts +++ b/rivetkit-typescript/packages/rivetkit/src/common/database/config.ts @@ -18,13 +18,24 @@ export interface SqliteQueryResult { rows: unknown[][]; } +export interface SqliteExecuteResult extends SqliteQueryResult { + changes: number; + lastInsertRowId?: number | null; + route: "read" | "write" | "writeFallback"; +} + export interface SqliteDatabase { exec( sql: string, callback?: (row: unknown[], columns: string[]) => void, ): Promise; + execute( + sql: string, + params?: SqliteBindings, + ): Promise; run(sql: string, params?: SqliteBindings): Promise; query(sql: string, params?: SqliteBindings): Promise; + writeMode(callback: () => Promise): Promise; close(): Promise; } diff --git a/rivetkit-typescript/packages/rivetkit/src/common/database/mod.ts b/rivetkit-typescript/packages/rivetkit/src/common/database/mod.ts index 43bc480570..968f1e6c58 100644 --- a/rivetkit-typescript/packages/rivetkit/src/common/database/mod.ts +++ b/rivetkit-typescript/packages/rivetkit/src/common/database/mod.ts @@ -1,5 +1,5 @@ -import type { DatabaseProvider, RawAccess } from "./config"; -import { AsyncMutex, isSqliteBindingObject, toSqliteBindings } from "./shared"; +import type { DatabaseProvider, RawAccess, SqliteDatabase } from "./config"; +import { isSqliteBindingObject, toSqliteBindings } from "./shared"; export type { RawAccess } from "./config"; @@ -7,27 +7,15 @@ interface DatabaseFactoryConfig { onMigrate?: (db: RawAccess) => Promise | void; } -function sqlReturnsRows(query: string): boolean { - const token = query.trimStart().slice(0, 16).toUpperCase(); - if (token.startsWith("PRAGMA")) { - return !/^PRAGMA\b[\s\S]*=/.test(query.trim()); - } - return ( - token.startsWith("SELECT") || - token.startsWith("WITH") || - /\bRETURNING\b/i.test(query) - ); -} +type RawAccessWithWriteMode = RawAccess & { + __rivetWriteMode: (callback: () => Promise | T) => Promise; +}; function hasMultipleStatements(query: string): boolean { const trimmed = query.trim().replace(/;+$/, "").trimEnd(); return trimmed.includes(";"); } -function isPragmaAssignment(query: string): boolean { - return /^PRAGMA\b[\s\S]*=/.test(query.trim()); -} - export function db({ onMigrate, }: DatabaseFactoryConfig = {}): DatabaseProvider { @@ -40,9 +28,8 @@ export function db({ ); } - const db = await nativeDatabaseProvider.open(ctx.actorId); - let closed = false; - const mutex = new AsyncMutex(); + const db = await nativeDatabaseProvider.open(ctx.actorId); + let closed = false; const ensureOpen = () => { if (closed) { throw new Error( @@ -51,7 +38,7 @@ export function db({ } }; - const client = { + const client: RawAccessWithWriteMode = { execute: async < TRow extends Record = Record< string, @@ -61,111 +48,37 @@ export function db({ query: string, ...args: unknown[] ): Promise => { - return await mutex.run(async () => { - ensureOpen(); + ensureOpen(); - const kvReadsBefore = ctx.metrics?.totalKvReads ?? 0; - const kvWritesBefore = ctx.metrics?.totalKvWrites ?? 0; - const start = performance.now(); + const kvReadsBefore = ctx.metrics?.totalKvReads ?? 0; + const kvWritesBefore = ctx.metrics?.totalKvWrites ?? 0; + const start = performance.now(); - // `db.exec` does not support binding `?` placeholders. - // Use `db.query` for statements that return rows and `db.run` for - // statements that mutate data when parameters are provided. - // Keep using `db.exec` for non-parameterized SQL because it - // supports multi-statement migrations. - let result: TRow[]; + try { if (args.length > 0) { const bindings = args.length === 1 && isSqliteBindingObject(args[0]) ? toSqliteBindings(args[0]) : toSqliteBindings(args); - const returnsRows = sqlReturnsRows(query); + const { rows, columns } = await db.execute( + query, + bindings, + ); + return rows.map((row) => + rowToObject(row, columns), + ); + } - if (returnsRows) { - const { rows, columns } = await db.query( - query, - bindings, - ); - result = rows.map((row: unknown[]) => { - const rowObj: Record = {}; - for (let i = 0; i < columns.length; i++) { - rowObj[columns[i]] = row[i]; - } - return rowObj; - }) as TRow[]; - } else { - await db.run(query, bindings); - result = [] as TRow[]; - } - } else { - const returnsRows = sqlReturnsRows(query); - if (!hasMultipleStatements(query)) { - if (returnsRows) { - const { rows, columns } = - await db.query(query); - result = rows.map((row: unknown[]) => { - const rowObj: Record = - {}; - for ( - let i = 0; - i < columns.length; - i++ - ) { - rowObj[columns[i]] = row[i]; - } - return rowObj; - }) as TRow[]; - } else if (isPragmaAssignment(query)) { - await db.run(query); - result = [] as TRow[]; - } else { - const results: Record[] = - []; - let columnNames: string[] | null = null; - await db.exec( - query, - (row: unknown[], columns: string[]) => { - if (!columnNames) { - columnNames = columns; - } - const rowObj: Record< - string, - unknown - > = {}; - for ( - let i = 0; - i < row.length; - i++ - ) { - rowObj[columnNames[i]] = row[i]; - } - results.push(rowObj); - }, - ); - result = results as TRow[]; - } - } else { - const results: Record[] = []; - let columnNames: string[] | null = null; - await db.exec( - query, - (row: unknown[], columns: string[]) => { - if (!columnNames) { - columnNames = columns; - } - const rowObj: Record = - {}; - for (let i = 0; i < row.length; i++) { - rowObj[columnNames[i]] = row[i]; - } - results.push(rowObj); - }, - ); - result = results as TRow[]; - } + if (!hasMultipleStatements(query)) { + const { rows, columns } = await db.execute(query); + return rows.map((row) => + rowToObject(row, columns), + ); } + return await execMultiStatement(db, query); + } finally { const durationMs = performance.now() - start; ctx.metrics?.trackSql(query, durationMs); if (ctx.metrics) { @@ -181,26 +94,67 @@ export function db({ kvWrites, }); } - return result; - }); + } }, close: async () => { - const shouldClose = await mutex.run(async () => { - if (closed) return false; + if (!closed) { closed = true; - return true; - }); - if (shouldClose) { await db.close(); } }, - } satisfies RawAccess; + __rivetWriteMode: async ( + callback: () => Promise | T, + ): Promise => { + return await db.writeMode(async () => await callback()); + }, + }; return client; }, onMigrate: async (client) => { if (onMigrate) { - await onMigrate(client); + await dbWriteMode(client, () => onMigrate(client)); } }, }; } + +function rowToObject>( + row: unknown[], + columns: string[], +): TRow { + const rowObj: Record = {}; + for (let i = 0; i < columns.length; i++) { + rowObj[columns[i]] = row[i]; + } + return rowObj as TRow; +} + +async function execMultiStatement>( + db: SqliteDatabase, + query: string, +): Promise { + const results: Record[] = []; + let columnNames: string[] | null = null; + await db.exec(query, (row: unknown[], columns: string[]) => { + if (!columnNames) { + columnNames = columns; + } + results.push(rowToObject(row, columnNames)); + }); + return results as TRow[]; +} + +async function dbWriteMode( + client: RawAccess, + callback: () => Promise | T, +): Promise { + const maybeClient = client as RawAccess & { + __rivetWriteMode?: ( + callback: () => Promise | TInner, + ) => Promise; + }; + if (maybeClient.__rivetWriteMode) { + return await maybeClient.__rivetWriteMode(callback); + } + return await callback(); +} diff --git a/rivetkit-typescript/packages/rivetkit/src/common/database/native-database.test.ts b/rivetkit-typescript/packages/rivetkit/src/common/database/native-database.test.ts new file mode 100644 index 0000000000..dcc51da9c2 --- /dev/null +++ b/rivetkit-typescript/packages/rivetkit/src/common/database/native-database.test.ts @@ -0,0 +1,154 @@ +import { describe, expect, test } from "vitest"; +import { + type JsNativeDatabaseLike, + wrapJsNativeDatabase, +} from "./native-database"; + +type NativeParams = Parameters[1]; +type NativeExecuteResult = Awaited>; + +function deferred() { + let resolve!: (value: T) => void; + let reject!: (error: unknown) => void; + const promise = new Promise((resolvePromise, rejectPromise) => { + resolve = resolvePromise; + reject = rejectPromise; + }); + return { promise, resolve, reject }; +} + +class FakeNativeDatabase implements JsNativeDatabaseLike { + active = 0; + maxActive = 0; + closed = false; + executeCalls: { sql: string; params?: NativeParams; write: boolean }[] = []; + #pending: ReturnType>[] = []; + + async exec() { + return { columns: [], rows: [] }; + } + + async execute(sql: string, params?: NativeParams) { + return await this.#startExecute(sql, params, false); + } + + async executeWrite(sql: string, params?: NativeParams) { + return await this.#startExecute(sql, params, true); + } + + async query(sql: string, params?: NativeParams) { + const { columns, rows } = await this.execute(sql, params); + return { columns, rows }; + } + + async run(sql: string, params?: NativeParams) { + const { changes } = await this.execute(sql, params); + return { changes }; + } + + takeLastKvError() { + return null; + } + + async close() { + this.closed = true; + } + + resolveNext(result: Partial = {}) { + const pending = this.#pending.shift(); + if (!pending) { + throw new Error("no pending native execute call"); + } + pending.resolve({ + columns: [], + rows: [], + changes: 0, + lastInsertRowId: null, + route: "read", + ...result, + }); + } + + async #startExecute( + sql: string, + params: NativeParams, + write: boolean, + ): Promise { + this.executeCalls.push({ sql, params, write }); + this.active++; + this.maxActive = Math.max(this.maxActive, this.active); + const pending = deferred(); + this.#pending.push(pending); + try { + return await pending.promise; + } finally { + this.active--; + } + } +} + +describe("wrapJsNativeDatabase", () => { + test("admits Promise.all read queries concurrently", async () => { + const native = new FakeNativeDatabase(); + const db = wrapJsNativeDatabase(native); + + const first = db.query("SELECT 1"); + const second = db.query("SELECT 2"); + + expect(native.maxActive).toBe(2); + native.resolveNext({ columns: ["value"], rows: [[1]] }); + native.resolveNext({ columns: ["value"], rows: [[2]] }); + + await expect(first).resolves.toEqual({ + columns: ["value"], + rows: [[1]], + }); + await expect(second).resolves.toEqual({ + columns: ["value"], + rows: [[2]], + }); + }); + + test("routes migration-mode calls through native write execution", async () => { + const native = new FakeNativeDatabase(); + const db = wrapJsNativeDatabase(native); + + const query = db.writeMode(async () => { + const promise = db.query("SELECT 1"); + expect(native.executeCalls).toMatchObject([ + { sql: "SELECT 1", write: true }, + ]); + native.resolveNext({ + columns: ["value"], + rows: [[1]], + route: "write", + }); + return await promise; + }); + + await expect(query).resolves.toEqual({ + columns: ["value"], + rows: [[1]], + }); + }); + + test("close waits for admitted native calls and rejects new work", async () => { + const native = new FakeNativeDatabase(); + const db = wrapJsNativeDatabase(native); + + const query = db.query("SELECT 1"); + const close = db.close(); + await Promise.resolve(); + + expect(native.closed).toBe(false); + native.resolveNext({ columns: ["value"], rows: [[1]] }); + + await query; + await close; + + expect(native.closed).toBe(true); + await expect(db.query("SELECT 2")).rejects.toThrow( + "Database is closed", + ); + }); +}); diff --git a/rivetkit-typescript/packages/rivetkit/src/common/database/native-database.ts b/rivetkit-typescript/packages/rivetkit/src/common/database/native-database.ts index c4a82182e3..e7ac98d83c 100644 --- a/rivetkit-typescript/packages/rivetkit/src/common/database/native-database.ts +++ b/rivetkit-typescript/packages/rivetkit/src/common/database/native-database.ts @@ -1,6 +1,9 @@ import { decodeBridgeRivetError } from "@/actor/errors"; -import { AsyncMutex } from "./shared"; -import type { SqliteBindings, SqliteDatabase } from "./config"; +import type { + SqliteBindings, + SqliteDatabase, + SqliteExecuteResult, +} from "./config"; interface NativeBindParam { kind: "null" | "int" | "float" | "text" | "blob"; @@ -24,8 +27,24 @@ interface NativeRunResult { changes: number; } +interface NativeExecuteResult { + columns: string[]; + rows: unknown[][]; + changes: number; + lastInsertRowId?: number | null; + route: string; +} + export interface JsNativeDatabaseLike { exec(sql: string): Promise; + execute( + sql: string, + params?: NativeBindParam[] | null, + ): Promise; + executeWrite( + sql: string, + params?: NativeBindParam[] | null, + ): Promise; query( sql: string, params?: NativeBindParam[] | null, @@ -157,18 +176,81 @@ function toNativeBindings( }); } -export function wrapJsNativeDatabase( - database: JsNativeDatabaseLike, -): SqliteDatabase { - const mutex = new AsyncMutex(); - let closed = false; +function normalizeExecuteRoute(route: string): SqliteExecuteResult["route"] { + if (route === "read" || route === "write" || route === "writeFallback") { + return route; + } + throw new Error(`unsupported sqlite execute route: ${route}`); +} - const ensureOpen = () => { - if (closed) { +class NativeCloseGate { + #active = 0; + #closed = false; + #waiters: (() => void)[] = []; + + enter(): () => void { + if (this.#closed) { throw new Error( "Database is closed. This usually means a background timer (setInterval, setTimeout) or a stray promise is still running after the actor stopped. Use c.abortSignal to clean up timers before the actor shuts down.", ); } + + this.#active++; + let released = false; + return () => { + if (released) { + return; + } + released = true; + this.#active--; + if (this.#active === 0) { + const waiters = this.#waiters.splice(0); + for (const waiter of waiters) { + waiter(); + } + } + }; + } + + async close(callback: () => Promise): Promise { + if (this.#closed) { + return; + } + this.#closed = true; + if (this.#active > 0) { + await new Promise((resolve) => this.#waiters.push(resolve)); + } + await callback(); + } +} + +export function wrapJsNativeDatabase( + database: JsNativeDatabaseLike, +): SqliteDatabase { + const gate = new NativeCloseGate(); + let closePromise: Promise | undefined; + let writeModeDepth = 0; + + const executeNative = async ( + sql: string, + params?: SqliteBindings, + ): Promise => { + const release = gate.enter(); + try { + const nativeParams = toNativeBindings(sql, params); + const result = + writeModeDepth > 0 + ? await database.executeWrite(sql, nativeParams) + : await database.execute(sql, nativeParams); + return { + ...result, + route: normalizeExecuteRoute(result.route), + }; + } catch (error) { + enrichNativeDatabaseError(database, error); + } finally { + release(); + } }; return { @@ -176,14 +258,15 @@ export function wrapJsNativeDatabase( sql: string, callback?: (row: unknown[], columns: string[]) => void, ): Promise { - const result = await mutex.run(async () => { - ensureOpen(); - try { - return await database.exec(sql); - } catch (error) { - enrichNativeDatabaseError(database, error); - } - }); + const release = gate.enter(); + let result: NativeExecResult; + try { + result = await database.exec(sql); + } catch (error) { + enrichNativeDatabaseError(database, error); + } finally { + release(); + } if (!callback) { return; } @@ -191,34 +274,30 @@ export function wrapJsNativeDatabase( callback(row, result.columns); } }, + async execute( + sql: string, + params?: SqliteBindings, + ): Promise { + return await executeNative(sql, params); + }, async run(sql: string, params?: SqliteBindings): Promise { - await mutex.run(async () => { - ensureOpen(); - try { - await database.run(sql, toNativeBindings(sql, params)); - } catch (error) { - enrichNativeDatabaseError(database, error); - } - }); + await executeNative(sql, params); }, async query(sql: string, params?: SqliteBindings) { - return await mutex.run(async () => { - ensureOpen(); - try { - return await database.query(sql, toNativeBindings(sql, params)); - } catch (error) { - enrichNativeDatabaseError(database, error); - } - }); + const { columns, rows } = await executeNative(sql, params); + return { columns, rows }; }, - async close(): Promise { - await mutex.run(async () => { - if (closed) { - return; - } - closed = true; - await database.close(); - }); + async writeMode(callback: () => Promise): Promise { + writeModeDepth++; + try { + return await callback(); + } finally { + writeModeDepth--; + } + }, + async close(): Promise { + closePromise ??= gate.close(() => database.close()); + await closePromise; }, }; } diff --git a/rivetkit-typescript/packages/rivetkit/src/db/drizzle.ts b/rivetkit-typescript/packages/rivetkit/src/db/drizzle.ts index 7c509550bd..9a60580860 100644 --- a/rivetkit-typescript/packages/rivetkit/src/db/drizzle.ts +++ b/rivetkit-typescript/packages/rivetkit/src/db/drizzle.ts @@ -1,17 +1,18 @@ -import { createHash } from "node:crypto"; import { drizzle, type RemoteCallback, type SqliteRemoteDatabase, } from "drizzle-orm/sqlite-proxy"; -import { AsyncMutex, toSqliteBindings } from "@/common/database/shared"; import type { DatabaseProvider, DatabaseProviderContext, RawAccess, SqliteDatabase, } from "@/common/database/config"; +import { toSqliteBindings } from "@/common/database/shared"; +import { getNodeCrypto } from "@/utils/node"; +export type { SQLiteTable } from "drizzle-orm/sqlite-core"; export { alias, check, @@ -25,7 +26,6 @@ export { unique, uniqueIndex, } from "drizzle-orm/sqlite-core"; -export type { SQLiteTable } from "drizzle-orm/sqlite-core"; type DrizzleSchema = Record; type DrizzleDatabase = @@ -88,9 +88,7 @@ export function db>({ ); } - const nativeDb = await nativeDatabaseProvider.open(ctx.actorId); - - const mutex = new AsyncMutex(); + const nativeDb = await nativeDatabaseProvider.open(ctx.actorId); let closed = false; const ensureOpen = () => { if (closed) { @@ -105,42 +103,37 @@ export function db>({ params: unknown[], method: "run" | "all" | "values" | "get", ) => { - return await mutex.run(async () => { - ensureOpen(); - - const start = performance.now(); - const kvReadsBefore = ctx.metrics?.totalKvReads ?? 0; - const kvWritesBefore = ctx.metrics?.totalKvWrites ?? 0; - try { - if (method === "run") { - await nativeDb.run(query, toSqliteBindings(params)); - return { rows: [] }; - } - - const { rows } = await nativeDb.query( - query, - toSqliteBindings(params), - ); - if (method === "get") { - return { rows: rows[0] }; - } - return { rows }; - } finally { - const durationMs = performance.now() - start; - ctx.metrics?.trackSql(query, durationMs); - if (ctx.metrics) { - ctx.log?.debug({ - msg: "sql query", - query: query.slice(0, 120), - durationMs, - kvReads: - ctx.metrics.totalKvReads - kvReadsBefore, - kvWrites: - ctx.metrics.totalKvWrites - kvWritesBefore, - }); - } + ensureOpen(); + + const start = performance.now(); + const kvReadsBefore = ctx.metrics?.totalKvReads ?? 0; + const kvWritesBefore = ctx.metrics?.totalKvWrites ?? 0; + try { + const { rows } = await nativeDb.execute( + query, + toSqliteBindings(params), + ); + if (method === "run") { + return { rows: [] }; + } + if (method === "get") { + return { rows: rows[0] }; + } + return { rows }; + } finally { + const durationMs = performance.now() - start; + ctx.metrics?.trackSql(query, durationMs); + if (ctx.metrics) { + ctx.log?.debug({ + msg: "sql query", + query: query.slice(0, 120), + durationMs, + kvReads: ctx.metrics.totalKvReads - kvReadsBefore, + kvWrites: + ctx.metrics.totalKvWrites - kvWritesBefore, + }); } - }); + } }; const callback: RemoteCallback = async (query, params, method) => { @@ -158,7 +151,6 @@ export function db>({ ): Promise => { return await executeRaw( nativeDb, - mutex, ctx, ensureOpen, query, @@ -166,29 +158,50 @@ export function db>({ ); }; drizzleDb.close = async () => { - const shouldClose = await mutex.run(async () => { - if (closed) return false; + if (!closed) { closed = true; - return true; - }); - if (shouldClose) { await nativeDb.close(); } }; + ( + drizzleDb as DrizzleDatabase & { + __rivetWriteMode: ( + callback: () => Promise | T, + ) => Promise; + } + ).__rivetWriteMode = async (callback) => + await nativeDb.writeMode(async () => await callback()); return drizzleDb; }, onMigrate: async (client) => { - if (migrations) { - await runMigrations(client, migrations); - } - if (onMigrate) { - await onMigrate(client); - } + await dbWriteMode(client, async () => { + if (migrations) { + await runMigrations(client, migrations); + } + if (onMigrate) { + await onMigrate(client); + } + }); }, }; } +async function dbWriteMode( + client: RawAccess, + callback: () => Promise | T, +): Promise { + const maybeClient = client as RawAccess & { + __rivetWriteMode?: ( + callback: () => Promise | TInner, + ) => Promise; + }; + if (maybeClient.__rivetWriteMode) { + return await maybeClient.__rivetWriteMode(callback); + } + return await callback(); +} + async function runMigrations( db: DrizzleDatabase, migrations: DrizzleMigrations, @@ -231,7 +244,10 @@ async function runMigrations( await db.execute( "INSERT INTO __drizzle_migrations (hash, created_at) VALUES (?, ?)", - createHash("sha256").update(migration).digest("hex"), + getNodeCrypto() + .createHash("sha256") + .update(migration) + .digest("hex"), entry.when, ); } @@ -252,18 +268,6 @@ function parseMigrationJournal(journal: unknown): { return journal as { entries: DrizzleMigrationJournalEntry[] }; } -function sqlReturnsRows(query: string): boolean { - const token = query.trimStart().slice(0, 16).toUpperCase(); - if (token.startsWith("PRAGMA")) { - return !/^PRAGMA\b[\s\S]*=/.test(query.trim()); - } - return ( - token.startsWith("SELECT") || - token.startsWith("WITH") || - /\bRETURNING\b/i.test(query) - ); -} - function hasMultipleStatements(query: string): boolean { const trimmed = query.trim().replace(/;+$/, "").trimEnd(); return trimmed.includes(";"); @@ -282,63 +286,50 @@ function rowToObject>( async function executeRaw>( db: SqliteDatabase, - mutex: AsyncMutex, ctx: DatabaseProviderContext, ensureOpen: () => void, query: string, args: unknown[], ): Promise { - return await mutex.run(async () => { - ensureOpen(); - - const start = performance.now(); - const kvReadsBefore = ctx.metrics?.totalKvReads ?? 0; - const kvWritesBefore = ctx.metrics?.totalKvWrites ?? 0; - try { - if (args.length > 0) { - if (!sqlReturnsRows(query)) { - await db.run(query, toSqliteBindings(args)); - return []; - } - - const { rows, columns } = await db.query( - query, - toSqliteBindings(args), - ); - return rows.map((row) => rowToObject(row, columns)); - } + ensureOpen(); + + const start = performance.now(); + const kvReadsBefore = ctx.metrics?.totalKvReads ?? 0; + const kvWritesBefore = ctx.metrics?.totalKvWrites ?? 0; + try { + if (args.length > 0) { + const { rows, columns } = await db.execute( + query, + toSqliteBindings(args), + ); + return rows.map((row) => rowToObject(row, columns)); + } - if (!hasMultipleStatements(query)) { - if (!sqlReturnsRows(query)) { - await db.run(query); - return []; - } + if (!hasMultipleStatements(query)) { + const { rows, columns } = await db.execute(query); + return rows.map((row) => rowToObject(row, columns)); + } - const { rows, columns } = await db.query(query); - return rows.map((row) => rowToObject(row, columns)); + const results: Record[] = []; + let columnNames: string[] | null = null; + await db.exec(query, (row, columns) => { + if (!columnNames) { + columnNames = columns; } - - const results: Record[] = []; - let columnNames: string[] | null = null; - await db.exec(query, (row, columns) => { - if (!columnNames) { - columnNames = columns; - } - results.push(rowToObject(row, columnNames)); + results.push(rowToObject(row, columnNames)); + }); + return results as TRow[]; + } finally { + const durationMs = performance.now() - start; + ctx.metrics?.trackSql(query, durationMs); + if (ctx.metrics) { + ctx.log?.debug({ + msg: "sql query", + query: query.slice(0, 120), + durationMs, + kvReads: ctx.metrics.totalKvReads - kvReadsBefore, + kvWrites: ctx.metrics.totalKvWrites - kvWritesBefore, }); - return results as TRow[]; - } finally { - const durationMs = performance.now() - start; - ctx.metrics?.trackSql(query, durationMs); - if (ctx.metrics) { - ctx.log?.debug({ - msg: "sql query", - query: query.slice(0, 120), - durationMs, - kvReads: ctx.metrics.totalKvReads - kvReadsBefore, - kvWrites: ctx.metrics.totalKvWrites - kvWritesBefore, - }); - } } - }); + } } diff --git a/scripts/ralph/.last-branch b/scripts/ralph/.last-branch index 922dcc17e4..2321bd7578 100644 --- a/scripts/ralph/.last-branch +++ b/scripts/ralph/.last-branch @@ -1 +1 @@ -04-28-feat_sqlite_benchmark_cold_reads +04-29-feat_sqlite_add_cold_read_benchmarks_and_simplify_optimizations diff --git a/scripts/ralph/archive/2026-04-29-04-28-feat_sqlite_benchmark_cold_reads/prd.json b/scripts/ralph/archive/2026-04-29-04-28-feat_sqlite_benchmark_cold_reads/prd.json new file mode 100644 index 0000000000..8b935179f9 --- /dev/null +++ b/scripts/ralph/archive/2026-04-29-04-28-feat_sqlite_benchmark_cold_reads/prd.json @@ -0,0 +1,214 @@ +{ + "project": "sqlite-read-connection-manager", + "branchName": "04-29-feat_sqlite_add_cold_read_benchmarks_and_simplify_optimizations", + "description": "Implement a SQLite read-mode/write-mode connection manager so independent read-only queries can run in parallel while write mode holds exactly one writable connection and no readers.", + "userStories": [ + { + "id": "US-001", + "title": "Add SQLite statement classification helpers", + "description": "As a runtime developer, I want native SQLite statement classification helpers so that read-only routing is based on SQLite semantics instead of SQL string heuristics.", + "acceptanceCriteria": [ + "Add a rivetkit-sqlite helper that prepares one statement without stepping and reports whether SQLite considers it read-only via sqlite3_stmt_readonly", + "Reject reader routing when sqlite3_prepare_v2 returns non-whitespace tail text after the first statement", + "Capture authorizer actions during classification for transaction control, attach, detach, schema writes, temp writes, pragma usage, function calls, and write operations", + "Add tests covering SELECT, read-only PRAGMA, mutating PRAGMA, INSERT RETURNING, CTE writes, VACUUM, ATTACH, BEGIN, SAVEPOINT, and multi-statement SQL", + "Typecheck passes", + "Tests pass" + ], + "priority": 1, + "passes": false, + "notes": "" + }, + { + "id": "US-002", + "title": "Split VFS ownership from SQLite connections", + "description": "As a runtime developer, I want VFS registration and SQLite connection ownership split apart so that one actor can open multiple connections against one shared VFS cache.", + "acceptanceCriteria": [ + "Introduce native ownership types equivalent to NativeVfsHandle and NativeConnection without changing public TypeScript APIs", + "Keep one shared VFS registration and VfsContext per actor database manager while allowing multiple SQLite connection handles", + "Use a VFS name that includes an actor database generation or pool generation instead of only the actor id", + "Ensure manager close order closes every SQLite connection before unregistering the VFS", + "Add tests or assertions covering multiple connections sharing one VFS context and VFS cleanup after connection close", + "Typecheck passes", + "Tests pass" + ], + "priority": 2, + "passes": false, + "notes": "" + }, + { + "id": "US-003", + "title": "Enforce read-only VFS roles", + "description": "As a runtime developer, I want VFS file handles to know whether they belong to a reader or writer so that read-only connections cannot mutate actor SQLite state.", + "acceptanceCriteria": [ + "Store reader or writer role on VfsFile and auxiliary file handles opened through the RivetKit SQLite VFS", + "Set SQLite pOutFlags consistently with the requested open flags and the assigned role", + "Reject reader-owned xWrite, xTruncate, xDelete, dirty sync, and atomic-write file-control operations", + "Deny reader auxiliary-file creation unless the path is explicitly proven safe and documented in code", + "Add VFS tests proving reader handles fail closed on write-only callbacks while writer handles still support existing write paths", + "Typecheck passes", + "Tests pass" + ], + "priority": 3, + "passes": false, + "notes": "" + }, + { + "id": "US-004", + "title": "Add the connection manager mode gate", + "description": "As a runtime developer, I want an actor-local SQLite mode gate so that read mode and write mode are mutually exclusive and write requests cannot starve.", + "acceptanceCriteria": [ + "Add a NativeConnectionManager skeleton with closed, read-mode, write-mode, and closing state", + "Allow read mode to hold lazy read-only connections up to a configurable maximum reader count", + "When write mode is requested, stop admitting new reads, wait for active readers, close all readers, then open exactly one writable connection", + "When closing is requested, stop admitting new work, wait for active work to finish or cancellation to fire, close connections, and unregister the VFS", + "Use async coordination for the gate and avoid holding sync lock guards across await points", + "Add tests for read admission, writer preference, read-to-write transition, and close ordering", + "Typecheck passes", + "Tests pass" + ], + "priority": 4, + "passes": false, + "notes": "" + }, + { + "id": "US-005", + "title": "Route write work through exclusive write mode", + "description": "As a runtime developer, I want every mutation and transaction to run through exclusive write mode so that no reader connection is open while a writable connection exists.", + "acceptanceCriteria": [ + "Route run calls, exec calls, migrations, schema-changing statements, and classification fallbacks through write mode", + "Treat raw transaction-control statements as write-mode only even if SQLite reports them as read-only", + "Keep the manager in write mode while sqlite3_get_autocommit on the writer returns false", + "After write-mode work completes with autocommit restored, close the writable connection before admitting read-mode work", + "Add tests proving BEGIN or SAVEPOINT blocks reader creation until COMMIT or ROLLBACK completes", + "Add tests proving a pending writer waits for active readers and new readers wait behind the writer", + "Typecheck passes", + "Tests pass" + ], + "priority": 5, + "passes": false, + "notes": "" + }, + { + "id": "US-006", + "title": "Execute read-only statements on read connections", + "description": "As a Rivet Actor developer, I want independent read-only statements to run on read connections so that expensive VFS round trips can overlap.", + "acceptanceCriteria": [ + "Route single-statement queries classified as read-only to read-mode connections opened with SQLITE_OPEN_READONLY", + "Set PRAGMA query_only = ON on reader connections", + "Install a mandatory reader authorizer that denies transaction control, attach, detach, schema writes, temp writes, unsafe pragmas, unsafe functions, and all write actions", + "Open readers lazily for concurrent read demand and reuse idle readers while the idle TTL has not expired", + "Add a deterministic test with artificial VFS delay proving concurrent read-only statements use multiple reader connections instead of serial execution", + "Add tests proving reader authorizer or VFS rejection is treated as a routing bug and fails closed", + "Typecheck passes", + "Tests pass" + ], + "priority": 6, + "passes": false, + "notes": "" + }, + { + "id": "US-007", + "title": "Add a native execute result API", + "description": "As a TypeScript runtime maintainer, I want a native execute API that returns rows, columns, changes, and route metadata so that TypeScript does not decide read/write behavior by parsing SQL strings.", + "acceptanceCriteria": [ + "Add a native execute path that prepares, classifies, routes, steps, and returns rows and column names for single-statement SQL", + "Return write metadata such as changes and last insert row id when available", + "Return route metadata indicating whether the statement used read mode, write mode, or write fallback", + "Keep query and run compatibility wrappers working through the native routing path where practical", + "Update core inspector database execute handling to use the native execute path instead of bypassing the gate", + "Add tests covering SELECT, plain INSERT, INSERT RETURNING, read-only PRAGMA, mutating PRAGMA, and malformed SQL", + "Typecheck passes", + "Tests pass" + ], + "priority": 7, + "passes": false, + "notes": "" + }, + { + "id": "US-008", + "title": "Remove TypeScript read serialization", + "description": "As a RivetKit TypeScript user, I want TypeScript database wrappers to allow native parallel reads so that Promise.all over read-only queries actually overlaps VFS work.", + "acceptanceCriteria": [ + "Expose the native execute API through rivetkit-napi and the TypeScript native database wrapper", + "Remove or narrow per-query AsyncMutex usage in common/database/mod.ts once native routing is authoritative", + "Remove or narrow read-query serialization in common/database/native-database.ts", + "Remove or narrow Drizzle callback and raw execute serialization for read-only work in db/drizzle.ts", + "Keep closed-state checks with an in-flight counter or close gate so close waits for admitted native calls", + "Ensure migration hooks run in native migration mode, where all database calls route through write mode and reader creation is disabled", + "Add TypeScript tests proving Promise.all read queries reach native execution concurrently while write operations remain serialized by the native manager", + "Typecheck passes", + "Tests pass" + ], + "priority": 8, + "passes": false, + "notes": "" + }, + { + "id": "US-009", + "title": "Add read pool config flags and metrics", + "description": "As an operator, I want read pool configuration and metrics so that the feature can be rolled out, observed, and disabled safely.", + "acceptanceCriteria": [ + "Add central SQLite optimization config for sqlite_read_pool_enabled, sqlite_read_pool_max_readers, and sqlite_read_pool_idle_ttl_ms", + "Preserve old single-connection behavior when the read pool feature flag is disabled", + "Add Prometheus metrics for active readers, idle readers, read wait duration, write wait duration, routed read queries, write fallbacks, manual transaction duration, reader opens, reader closes, rejected reader mutations, and mode transitions", + "Keep existing VFS metrics aggregated at the shared VFS level", + "Add tests or snapshots proving config defaults and disabled-path behavior", + "Typecheck passes", + "Tests pass" + ], + "priority": 9, + "passes": false, + "notes": "" + }, + { + "id": "US-010", + "title": "Add kitchen-sink benchmark coverage", + "description": "As a performance investigator, I want kitchen-sink benchmark workloads for parallel reads and read-write transitions so that the read connection manager has a repeatable performance signal.", + "acceptanceCriteria": [ + "Ensure the kitchen-sink SQLite real-world benchmark includes a parallel-read-aggregates workload", + "Ensure the kitchen-sink SQLite real-world benchmark includes a parallel-read-write-transition workload", + "Report benchmark output that makes routed reads, routed writes, and transition metrics visible when the manager metrics exist", + "Add static or runtime tests proving the script and actor workload lists stay in sync", + "Document any required benchmark command updates in the relevant benchmark file or agent note", + "Typecheck passes", + "Tests pass" + ], + "priority": 10, + "passes": false, + "notes": "" + }, + { + "id": "US-011", + "title": "Add lifecycle and fencing stress coverage", + "description": "As a runtime developer, I want stress coverage around sleep, destroy, and fence errors so that pooled readers do not outlive actor lifecycle authority.", + "acceptanceCriteria": [ + "Add tests proving actor sleep or destroy stops new database work and closes active or idle reader connections in deterministic order", + "Add tests proving a fence mismatch from any reader marks the shared VFS dead and causes later database work to fail closed", + "Add tests proving actor replacement or generation changes do not collide with stale VFS registration names", + "Add tests proving manual raw transactions keep the manager in write mode across awaited user code", + "Add tests proving inspector and user database operations share the same native routing gate", + "Typecheck passes", + "Tests pass" + ], + "priority": 11, + "passes": false, + "notes": "" + }, + { + "id": "US-012", + "title": "Document the SQLite read-mode write-mode invariant", + "description": "As a future maintainer, I want the SQLite connection manager invariant documented so that later optimizations do not accidentally reintroduce readers beside a writer.", + "acceptanceCriteria": [ + "Update docs-internal or agent specs to state that read mode may hold multiple read-only connections and write mode must hold exactly one writable connection with no readers open", + "Update the SQLite optimization tracker with the read-mode/write-mode connection manager item if it is not already present", + "Document that v1 does not allow readers to continue during writes and does not pin per-reader head txids", + "Document that TypeScript must not be the policy boundary for read/write routing", + "Typecheck passes" + ], + "priority": 12, + "passes": false, + "notes": "" + } + ] +} diff --git a/scripts/ralph/archive/2026-04-29-04-28-feat_sqlite_benchmark_cold_reads/progress.txt b/scripts/ralph/archive/2026-04-29-04-28-feat_sqlite_benchmark_cold_reads/progress.txt new file mode 100644 index 0000000000..1d04bdf3b8 --- /dev/null +++ b/scripts/ralph/archive/2026-04-29-04-28-feat_sqlite_benchmark_cold_reads/progress.txt @@ -0,0 +1,5 @@ +# Ralph Progress Log +Started: Wed Apr 29 2026 +Project: sqlite-read-connection-manager +Branch: 04-29-feat_sqlite_add_cold_read_benchmarks_and_simplify_optimizations +--- diff --git a/scripts/ralph/archive/2026-04-29-sqlite-cold-read-optimizations/prd.json b/scripts/ralph/archive/2026-04-29-sqlite-cold-read-optimizations/prd.json new file mode 100644 index 0000000000..e84c715502 --- /dev/null +++ b/scripts/ralph/archive/2026-04-29-sqlite-cold-read-optimizations/prd.json @@ -0,0 +1,433 @@ +{ + "project": "sqlite-cold-read-optimizations", + "branchName": "04-28-feat_sqlite_benchmark_cold_reads", + "description": "Optimize SQLite cold full-scan reads for actors with existing database data. Baseline has already been measured in `.agent/notes/sqlite-cold-read-before.txt`: insert e2e 16048.5ms, hot read e2e 118.6ms, wake read e2e 20141.0ms, wake read server 19979.9ms, wake overhead estimate 161.2ms, wake read VFS get_pages 1249 calls, VFS fetched 20050 pages / 82124800 bytes, VFS prefetch 18801 pages / 77008896 bytes, VFS transport 19332.8ms.\n\nIf the baseline artifact is missing, regenerate it before any optimization with:\n\n`pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000 2>&1 | tee .agent/notes/sqlite-cold-read-before.txt`\n\nAfter every implementation story, run the same benchmark and write the full output to `.agent/notes/sqlite-cold-read-after-.txt`:\n\n`pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000 2>&1 | tee .agent/notes/sqlite-cold-read-after-.txt`\n\nEvery completed implementation story must record these numbers in its `notes`: insert e2e ms, hot read e2e ms, wake read server ms, wake read e2e ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms. Compare against `.agent/notes/sqlite-cold-read-before.txt` and the previous completed story. All SQLite cold-read optimization behavior should be behind central env-backed feature flags, enabled by default, so benchmarks can compare individual optimizations on and off.", + "userStories": [ + { + "id": "SQLITE-COLD-001", + "title": "Confirm baseline benchmark artifact", + "description": "Verify that `.agent/notes/sqlite-cold-read-before.txt` exists and contains a valid cold-read baseline. If it is missing or does not show a cold VFS read, rerun the kitchen-sink benchmark with `--wake-delay-ms 10000` and write the result to that file before any optimization work.", + "acceptanceCriteria": [ + "`.agent/notes/sqlite-cold-read-before.txt` exists", + "The baseline file includes wake read e2e, wake read server, VFS get_pages calls, fetched pages/bytes, prefetch pages/bytes, and VFS transport time", + "The baseline shows a real cold read with nonzero wake read VFS get_pages calls", + "`notes` records the baseline numbers from `.agent/notes/sqlite-cold-read-before.txt`", + "Typecheck passes" + ], + "priority": 1, + "passes": true, + "notes": "Baseline artifact verified at `.agent/notes/sqlite-cold-read-before.txt`. Numbers: insert e2e 16048.5ms; hot read e2e 118.6ms; wake read e2e 20141.0ms; wake read server 19979.9ms; wake overhead estimate 161.2ms; wake read VFS get_pages calls 1249; pages fetched 20050; bytes fetched 82124800; prefetch pages 18801; prefetch bytes 77008896; VFS transport 19332.8ms. This is the baseline story, so comparison target is the baseline artifact itself. Typecheck passed with `pnpm --filter kitchen-sink check-types` and `pnpm -F rivetkit check-types`." + }, + { + "id": "SQLITE-COLD-002", + "title": "Increase VFS read-ahead for forward scans", + "description": "Increase or adapt VFS prefetch for forward scans to at least shard-sized batches, then evaluate larger adaptive batches if memory and response size are acceptable. Keep point/random reads bounded so they do not over-fetch excessively.", + "acceptanceCriteria": [ + "Forward cold scans issue materially fewer VFS get_pages calls than the 1249-call baseline", + "Hot read e2e does not materially regress versus the 118.6ms baseline", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-002.txt`", + "`notes` records all required benchmark numbers and compares them to baseline plus SQLITE-COLD-001", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass" + ], + "priority": 2, + "passes": true, + "notes": "Increased VFS default prefetch depth from 16 pages to a shard-sized 64 pages and added focused VFS coverage for sequential prefetch plus bounded point reads. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-002.txt`. Numbers: insert e2e 15001.2ms; hot read e2e 97.6ms; wake read e2e 8078.7ms; wake read server 7932.6ms; wake overhead estimate 146.1ms; wake read VFS get_pages calls 368; pages fetched 18851; bytes fetched 77213696; prefetch pages 18483; prefetch bytes 75706368; VFS transport 7648.0ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 368, wake read e2e dropped 20141.0ms -> 8078.7ms, wake VFS transport dropped 19332.8ms -> 7648.0ms, and hot read e2e improved 118.6ms -> 97.6ms. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + }, + { + "id": "SQLITE-COLD-003", + "title": "Record VFS predictor access on cache hits", + "description": "Fix the VFS predictor so cache-hit reads train sequential access patterns. Add a debug log around prefetch prediction so local debugging can see requested pages, missing pages, prediction budget, predicted pages, prefetch pages, total fetch size, and seed page without adding new public metrics or JS APIs.", + "acceptanceCriteria": [ + "Sequential reads through prefetched pages continue to train the predictor", + "A VFS debug log reports prefetch prediction details when prefetch is enabled and a fetch happens", + "No new JS-exposed VFS metrics or public debug API is added", + "Focused VFS coverage exists if practical", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-003.txt`", + "`notes` records all required benchmark numbers and compares them to baseline plus SQLITE-COLD-002", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass" + ], + "priority": 3, + "passes": true, + "notes": "Recorded VFS predictor accesses for cache-hit reads so sequential reads through prefetched pages continue training forward-scan prediction, and expanded the VFS debug log with requested pages, missing pages, prediction budget, predicted pages, prefetch pages, total fetch pages/bytes, and seed page. Added focused VFS coverage for cache-hit predictor training. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-003.txt`. Numbers: insert e2e 14861.4ms; hot read e2e 129.3ms; wake read e2e 5873.2ms; wake read server 5759.7ms; wake overhead estimate 113.4ms; wake read VFS get_pages calls 219; pages fetched 13713; bytes fetched 56168448; prefetch pages 13494; prefetch bytes 55271424; VFS transport 5519.9ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 219, wake read e2e dropped 20141.0ms -> 5873.2ms, wake VFS transport dropped 19332.8ms -> 5519.9ms, and hot read e2e was 118.6ms -> 129.3ms. Compared with SQLITE-COLD-002: get_pages calls dropped 368 -> 219, wake read e2e dropped 8078.7ms -> 5873.2ms, wake VFS transport dropped 7648.0ms -> 5519.9ms, and hot read e2e was 97.6ms -> 129.3ms. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + }, + { + "id": "SQLITE-COLD-004", + "title": "Add VFS recent-page hint tracker", + "description": "Track recently used SQLite VFS pages in memory as a compact preload hint plan. The tracker should capture hot pages and coalesced recent scan ranges instead of only the last pages touched, and it must stay bounded by a page/range budget.", + "acceptanceCriteria": [ + "The VFS records recently used pages and coalesced ranges without unbounded growth", + "Full table scans do not produce a tail-only MRU hint that ignores the start of the scanned range", + "The tracker exposes an internal snapshot method suitable for a runtime-side flush task", + "Focused VFS tracker coverage exists", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-004.txt`", + "`notes` records all required benchmark numbers and compares them to baseline plus SQLITE-COLD-003", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass" + ], + "priority": 4, + "passes": true, + "notes": "Added a bounded in-memory VFS recent-page hint tracker that records hot pages and coalesced scan ranges, avoids tail-only full-scan hints by preserving the active range start, and exposes `NativeDatabase::snapshot_preload_hints()` for future runtime-side flush wiring without adding a JS API. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-004.txt`. Numbers: insert e2e 15080.7ms; hot read e2e 161.7ms; wake read e2e 5884.3ms; wake read server 5743.7ms; wake overhead estimate 140.6ms; wake read VFS get_pages calls 220; pages fetched 13717; bytes fetched 56184832; prefetch pages 13497; prefetch bytes 55283712; VFS transport 5410.5ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 220, wake read e2e dropped 20141.0ms -> 5884.3ms, wake VFS transport dropped 19332.8ms -> 5410.5ms, and hot read e2e was 118.6ms -> 161.7ms. Compared with SQLITE-COLD-003: get_pages calls were 219 -> 220, wake read e2e was 5873.2ms -> 5884.3ms, wake VFS transport improved 5519.9ms -> 5410.5ms, and hot read e2e was 129.3ms -> 161.7ms. No cold-read speedup is expected until later stories persist and preload these hints. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite recent_page_tracker -- --nocapture; cargo test -p rivetkit-sqlite resolve_pages_records_recent_page_hint_snapshot -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force. Default parallel `cargo test -p rivetkit-sqlite` reproduced an existing large staged-delta test flake in `bench_large_tx_insert_100mb`; the same test passed alone and the serialized full suite passed." + }, + { + "id": "SQLITE-COLD-005", + "title": "Add SQLite optimization feature flags", + "description": "Create a central SQLite optimization feature flag module that reads environment variables once through a OnceCell-style cache. All SQLite cold-read optimizations, including already implemented read-ahead/predictor/recent-page tracker behavior and future preload/range/storage optimizations, should be enabled by default and individually disableable for benchmark comparison.", + "acceptanceCriteria": [ + "A single SQLite optimization feature flag file exists for the relevant crate or crate boundary, using OnceCell or equivalent one-time env parsing instead of scattered env reads", + "Feature flags are enabled by default and can be disabled with explicit env vars for benchmark comparison", + "Existing read-ahead, predictor-training, and recent-page tracker optimizations are gated by the central flags where they already exist", + "Future SQLite optimization stories have a clear place to add their env flag without adding ad hoc env reads", + "Full benchmark output with all flags at defaults is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-005.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms, and compares them to baseline plus SQLITE-COLD-004", + "At least one targeted check demonstrates disabling a flag restores or bypasses the gated optimization path", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass" + ], + "priority": 5, + "passes": true, + "notes": "Added central env-backed SQLite optimization flags in `rivetkit-sqlite/src/optimization_flags.rs`, read once through `OnceLock`, default-enabled and individually disableable. Existing shard-sized read-ahead, cache-hit predictor training, and recent-page hint snapshots/recording are gated by those central flags. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-005.txt`. Numbers: insert e2e 7755.7ms; hot read e2e 145.1ms; wake read e2e 8287.8ms; wake read server 4170.0ms; wake overhead estimate 4117.8ms; wake read VFS get_pages calls 219; pages fetched 13713; bytes fetched 56168448; prefetch pages 13494; prefetch bytes 55271424; VFS transport 3928.8ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 219, wake read e2e dropped 20141.0ms -> 8287.8ms, wake VFS transport dropped 19332.8ms -> 3928.8ms, and hot read e2e was 118.6ms -> 145.1ms. Compared with SQLITE-COLD-004: get_pages calls were 220 -> 219, wake read e2e was 5884.3ms -> 8287.8ms due to higher local wake overhead, wake read server improved 5743.7ms -> 4170.0ms, wake VFS transport improved 5410.5ms -> 3928.8ms, and hot read e2e improved 161.7ms -> 145.1ms. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite disabled_ -- --nocapture; cargo test -p rivetkit-sqlite flags_default_enabled -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + }, + { + "id": "SQLITE-COLD-006", + "title": "Add adaptive forward-scan read-ahead", + "description": "Build on the shard-sized read-ahead by detecting scan-like access patterns and increasing the VFS prefetch window for forward scans, while keeping random or point reads bounded. The detector should tolerate occasional b-tree/index/root jumps and should decay back to smaller windows when reads become scattered.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "The VFS detects mostly-forward scan-like page access without requiring perfectly sequential page numbers", + "Forward-scan mode can fetch larger windows than 64 pages while respecting a max byte/page response cap", + "Scattered/random access decays back to the smaller bounded prefetch window", + "Debug logging makes the selected read-ahead mode and window visible during local runs", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-006.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-005", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass" + ], + "priority": 6, + "passes": true, + "notes": "Added adaptive forward-scan read-ahead in the native SQLite VFS, gated by the central `adaptive_read_ahead` optimization flag and default-enabled. Mostly-forward scans can grow from the 64-page shard window to a 256-page / 1 MiB window, while isolated point reads and scattered access stay bounded; debug logs now include read-ahead mode, depth, and byte cap. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-006.txt`. Numbers: insert e2e 15810.0ms; hot read e2e 171.0ms; wake read e2e 4074.9ms; wake read server 3945.3ms; wake overhead estimate 129.6ms; wake read VFS get_pages calls 69; pages fetched 13726; bytes fetched 56221696; prefetch pages 13657; prefetch bytes 55939072; VFS transport 3723.1ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 69, wake read e2e dropped 20141.0ms -> 4074.9ms, wake VFS transport dropped 19332.8ms -> 3723.1ms, and hot read e2e was 118.6ms -> 171.0ms. Compared with SQLITE-COLD-005: get_pages calls dropped 219 -> 69, wake read e2e dropped 8287.8ms -> 4074.9ms, wake read server improved 4170.0ms -> 3945.3ms, wake VFS transport improved 3928.8ms -> 3723.1ms, and hot read e2e was 145.1ms -> 171.0ms. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite adaptive_read_ahead -- --nocapture; cargo test -p rivetkit-sqlite cache_hit_reads_train_forward_scan_prefetch -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + }, + { + "id": "SQLITE-COLD-007", + "title": "Persist recent-page preload hints through envoy-client", + "description": "Add a SQLite transport operation for the actor side to flush recent-page preload hints through envoy-client to pegboard-envoy. Pegboard-envoy should validate and fence the request, then sqlite-storage should persist the compact hint under a new SQLite v2 storage key.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "A new SQLite transport request persists preload hints through envoy-client and pegboard-envoy", + "The request includes generation fencing so stale takeovers cannot overwrite newer hints", + "sqlite-storage persists hints under a separate SQLite v2 key without affecting normal page data", + "Hint flush failures are best-effort and do not fail normal SQLite reads or writes unless explicitly required", + "Relevant Rust and protocol checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-007.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-006" + ], + "priority": 7, + "passes": true, + "notes": "Added a generation-fenced SQLite preload-hint persistence transport from envoy-client through pegboard-envoy into sqlite-storage. Hints are validated by pegboard-envoy, persisted under a separate SQLite v2 `/PRELOAD_HINTS` key, and failures are isolated to the new best-effort request path rather than normal reads/writes. Also fixed sqlite-storage open metadata to return the same quota-updated DBHead it writes. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-007.txt`. Numbers: insert e2e 15952.7ms; hot read e2e 193.5ms; wake read e2e 4040.1ms; wake read server 3883.5ms; wake overhead estimate 156.5ms; wake read VFS get_pages calls 69; pages fetched 13726; bytes fetched 56221696; prefetch pages 13657; prefetch bytes 55939072; VFS transport 3650.0ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 69, wake read e2e dropped 20141.0ms -> 4040.1ms, wake VFS transport dropped 19332.8ms -> 3650.0ms, and hot read e2e was 118.6ms -> 193.5ms. Compared with SQLITE-COLD-006: get_pages calls stayed 69 -> 69, wake read e2e improved 4074.9ms -> 4040.1ms, wake read server improved 3945.3ms -> 3883.5ms, wake VFS transport improved 3723.1ms -> 3650.0ms, and hot read e2e was 171.0ms -> 193.5ms. Checks passed: cargo check -p sqlite-storage; cargo check -p pegboard-envoy; cargo check -p rivet-envoy-client; cargo check -p rivet-envoy-protocol; cargo check -p rivet-sqlite-storage-protocol; cargo test -p sqlite-storage -- --test-threads=1; cargo test -p pegboard-envoy; cargo test -p rivet-envoy-client; cargo test -p rivet-envoy-protocol; cargo test -p rivet-sqlite-storage-protocol; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + }, + { + "id": "SQLITE-COLD-008", + "title": "Flush preload hints periodically and on actor stop", + "description": "Run a runtime-side periodic task while the actor is alive to snapshot VFS recent-page hints and flush them through envoy-client. Also perform a final best-effort flush during actor stop or sleep teardown, because SQLite open/close is takeover-based and close is not guaranteed.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "A runtime-side task periodically flushes recent-page hints while the actor is alive", + "Actor stop or sleep teardown performs a final best-effort recent-page hint flush", + "The task does not depend on SQLite close being called", + "The flush path avoids blocking shutdown indefinitely", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-008.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-007" + ], + "priority": 8, + "passes": true, + "notes": "Added core-owned SQLite preload hint flushing in `rivetkit-core`: opening SQLite starts a default-enabled periodic flush task, actor cleanup stops the task, snapshots VFS hints, and queues a final best-effort persist request before closing the native handle. Added `rivet-envoy-client` fire-and-forget preload-hint persistence so stop/sleep teardown does not wait indefinitely for a response while shutdown is already in motion. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-008.txt` with no preload-hint flush timeout warnings. Numbers: insert e2e 15945.6ms; hot read e2e 156.3ms; wake read e2e 4116.3ms; wake read server 3967.7ms; wake overhead estimate 148.6ms; wake read VFS get_pages calls 69; pages fetched 13726; bytes fetched 56221696; prefetch pages 13657; prefetch bytes 55939072; VFS transport 3738.6ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 69, wake read e2e dropped 20141.0ms -> 4116.3ms, wake VFS transport dropped 19332.8ms -> 3738.6ms, and hot read e2e was 118.6ms -> 156.3ms. Compared with SQLITE-COLD-007: get_pages calls stayed 69 -> 69, wake read e2e was 4040.1ms -> 4116.3ms, wake read server was 3883.5ms -> 3967.7ms, wake VFS transport was 3650.0ms -> 3738.6ms, and hot read e2e improved 193.5ms -> 156.3ms. Checks passed: cargo check -p rivet-envoy-client; cargo check -p rivetkit-core --features sqlite; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + }, + { + "id": "SQLITE-COLD-009", + "title": "Use persisted preload hints on actor start", + "description": "Load persisted recent-page preload hints during SQLite open and feed them into `OpenConfig.preload_pgnos`, `OpenConfig.preload_ranges`, and `OpenConfig.max_total_bytes` on the next actor start. Keep preload bounded and measurable. The preload selection must account for SQLite pager caching: index/root/schema pages are ordinary database pages, but repeat access can be hidden from VFS after first read, so pages read early after wake/open should be eligible preload candidates in addition to frequency and scan ranges. Different preload hint mechanisms must be configurable with env vars through the central SQLite optimization feature flag/config file.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "sqlite-storage open loads persisted preload hints if present", + "Preload hint selection treats pages read early after actor wake/open as preload candidates, because SQLite pager caching can hide repeated index/root/schema page usage from the VFS after the first read", + "Preload hint mechanisms are individually configurable through env vars in the central SQLite optimization feature flag/config file, including at least hot pages, early pages, and scan ranges", + "The selected preload mechanisms are enabled by default and can be disabled independently for benchmark comparison", + "pegboard-envoy passes hint-derived pages and ranges into OpenConfig during actor start", + "Preload budget is bounded and configurable or locally constant with a clear cap", + "A repeated wake touching the same working set preloads useful pages before the action runs", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-009.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-008" + ], + "priority": 9, + "passes": true, + "notes": "Added open-time consumption of persisted SQLite preload hints in `sqlite-storage`: `OpenConfig` now carries default-enabled preload-hint selection config from central env-backed optimization flags, open loads `/PRELOAD_HINTS` when enabled, applies persisted page and scan-range hints into the bounded preload request, and keeps the existing 1 MiB `max_total_bytes` cap. Moved the central flag implementation to `sqlite-storage::optimization_flags` and kept `rivetkit-sqlite::optimization_flags` as a re-export so native VFS callers use the same OnceLock-backed config. Added focused storage coverage for default persisted hint preloading plus disabled preload and disabled scan-range paths. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-009.txt`. Numbers: insert e2e 15947.0ms; hot read e2e 167.6ms; wake read e2e 4271.7ms; wake read server 3969.8ms; wake overhead estimate 301.9ms; wake read VFS get_pages calls 69; pages fetched 13726; bytes fetched 56221696; prefetch pages 13657; prefetch bytes 55939072; VFS transport 3749.0ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 69, wake read e2e dropped 20141.0ms -> 4271.7ms, wake VFS transport dropped 19332.8ms -> 3749.0ms, and hot read e2e was 118.6ms -> 167.6ms. Compared with SQLITE-COLD-008: get_pages calls stayed 69 -> 69, wake read e2e was 4116.3ms -> 4271.7ms, wake read server was 3967.7ms -> 3969.8ms, wake VFS transport was 3738.6ms -> 3749.0ms, and hot read e2e was 156.3ms -> 167.6ms. Checks passed: cargo check -p sqlite-storage; cargo check -p rivetkit-sqlite; cargo check -p pegboard-envoy; cargo check -p rivetkit-core --features sqlite; cargo test -p sqlite-storage -- --test-threads=1; cargo test -p rivetkit-sqlite -- --test-threads=1; cargo test -p pegboard-envoy; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + }, + { + "id": "SQLITE-COLD-010", + "title": "Remove duplicate get_pages meta reads", + "description": "Change sqlite-storage `get_pages` to return the meta/head it already read inside the page-read transaction, and update pegboard-envoy to reuse that meta instead of calling `load_meta` again for every successful get_pages response.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "Successful get_pages responses reuse meta from the storage read path", + "pegboard-envoy no longer performs a duplicate META read for each successful get_pages response", + "Fence mismatch behavior remains unchanged", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-010.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-009" + ], + "priority": 10, + "passes": true, + "notes": "Changed sqlite-storage `get_pages` to return `GetPagesResult` with both fetched pages and the `SqliteMeta` derived from the DBHead already read inside the page-read transaction, and updated pegboard-envoy to reuse that meta by default instead of loading META again for successful get_pages responses. The old duplicate-load behavior remains available through the default-enabled central `RIVETKIT_SQLITE_OPT_DEDUP_GET_PAGES_META` flag when disabled. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-010.txt`. Numbers: insert e2e 14779.2ms; hot read e2e 151.6ms; wake read e2e 4209.9ms; wake read server 3974.3ms; wake overhead estimate 235.5ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3741.3ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 4209.9ms, wake VFS transport dropped 19332.8ms -> 3741.3ms, and hot read e2e was 118.6ms -> 151.6ms. Compared with SQLITE-COLD-009: get_pages calls were 69 -> 70, wake read e2e improved 4271.7ms -> 4209.9ms, wake read server was 3969.8ms -> 3974.3ms, wake VFS transport improved 3749.0ms -> 3741.3ms, and hot read e2e improved 167.6ms -> 151.6ms. Checks passed: cargo check -p sqlite-storage; cargo check -p pegboard-envoy; cargo test -p sqlite-storage latency_paths_use_single_rtt_under_simulated_udb_latency -- --nocapture; cargo test -p sqlite-storage -- --test-threads=1; cargo test -p pegboard-envoy; cargo test -p pegboard actor_sqlite_migration -- --nocapture; cargo test -p rivet-engine actor_v2_2_1_migration -- --nocapture; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." + }, + { + "id": "SQLITE-COLD-011", + "title": "Cache repeated get_pages actor validation and open checks", + "description": "Remove fixed per-call overhead on repeated SQLite get_pages requests by caching pegboard-envoy SQLite actor validation for active actors and fast-pathing local-open checks for already-open serverless SQLite actors.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "Repeated get_pages calls avoid redundant actor validation for the active actor on the connection", + "Repeated get_pages calls avoid redundant local-open storage checks for an already-open actor generation", + "Authorization and generation mismatch behavior remains explicit and covered", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-011.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-010" + ], + "priority": 11, + "passes": true, + "notes": "Added a default-enabled get_pages validation fast path behind `RIVETKIT_SQLITE_OPT_CACHE_GET_PAGES_VALIDATION`: pegboard-envoy now reuses active actor state on the connection for repeated get_pages actor validation and reuses the serverless SQLite actor generation cache to skip redundant `ensure_local_open` calls when the actor generation is already known open. Stale cached serverless generations return an explicit `SqliteStorageError::FenceMismatch`, and disabling the central flag falls back to the existing validation/open path. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-011.txt`. Numbers: insert e2e 15413.3ms; hot read e2e 178.9ms; wake read e2e 4771.9ms; wake read server 3904.7ms; wake overhead estimate 867.2ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3665.3ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 4771.9ms, wake VFS transport dropped 19332.8ms -> 3665.3ms, and hot read e2e was 118.6ms -> 178.9ms. Compared with SQLITE-COLD-010: get_pages calls stayed 70 -> 70, wake read e2e was 4209.9ms -> 4771.9ms due to higher local wake overhead, wake read server improved 3974.3ms -> 3904.7ms, wake VFS transport improved 3741.3ms -> 3665.3ms, and hot read e2e was 151.6ms -> 178.9ms. Checks passed: cargo check -p pegboard-envoy; cargo check -p sqlite-storage; cargo test -p pegboard-envoy cached_ -- --nocapture; cargo test -p sqlite-storage flags_default_enabled_and_explicitly_disableable -- --nocapture; cargo test -p pegboard-envoy; cargo test -p sqlite-storage -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." + }, + { + "id": "SQLITE-COLD-012", + "title": "Specify SQLite range page-read protocol", + "description": "Write the concrete range page-read protocol shape before implementation. The spec should define request and response fields, byte/page caps, generation fencing, stale-owner behavior, fallback to page-list get_pages, and how VFS forward-scan detection decides to use range reads.", + "acceptanceCriteria": [ + "The range page-read request shape is documented with start page, max pages or max bytes, actor id, generation, and response meta semantics", + "The spec documents stale-owner and generation-fence behavior matching existing get_pages behavior", + "The spec documents when the VFS should use range reads versus page-list get_pages", + "The spec documents benchmark expectations and the after-file naming convention for the implementation stories", + "No runtime code changes are required for this story unless needed to place the spec", + "Typecheck passes", + "Tests pass" + ], + "priority": 12, + "passes": true, + "notes": "Specified the SQLite range page-read protocol in `.agent/specs/sqlite-range-page-read-protocol.md` and linked it from `docs-internal/engine/SQLITE_OPTIMIZATIONS.md`. The spec documents request and response fields (`actorId`, `generation`, `startPgno`, `maxPages`, `maxBytes`, contiguous fetched pages, and transaction-read `meta`), server byte/page caps, generation fencing and stale-owner behavior matching get_pages, VFS selection versus page-list fallback, and benchmark expectations with after-file naming for SQLITE-COLD-013 through SQLITE-COLD-015. No runtime code changes were made. Checks passed: pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; cargo test -p sqlite-storage -- --test-threads=1; cargo test -p pegboard-envoy." + }, + { + "id": "SQLITE-COLD-013", + "title": "Add sqlite-storage contiguous range read", + "description": "Add a sqlite-storage API that can read a contiguous page range with a max page or byte budget. This should reuse existing fencing and source-resolution behavior while reducing page-list construction and preparing the engine for a range protocol.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "sqlite-storage exposes a contiguous range page-read method with generation fencing", + "The range read returns the same page bytes as equivalent get_pages calls", + "The range read enforces a clear max page or byte budget", + "Focused sqlite-storage range-read tests pass", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-013.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-012" + ], + "priority": 13, + "passes": true, + "notes": "Added `SqliteEngine::get_page_range(...)` in sqlite-storage with generation fencing, page-zero and empty-budget validation, and a shared `read_pages` implementation that reuses existing get_pages source resolution, PIDX caching, stale PIDX cleanup, zero-page fallback, and transaction-read meta. Range reads are storage-only in this story; no runtime VFS path consumes them yet, and the existing central `RIVETKIT_SQLITE_OPT_RANGE_READS` flag remains the control point for the upcoming protocol/VFS stories. The range API enforces a 256-page / 1 MiB hard cap plus caller max_pages/max_bytes. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-013.txt`. Numbers: insert e2e 15808.6ms; hot read e2e 154.6ms; wake read e2e 7599.7ms; wake read server 3933.5ms; wake overhead estimate 3666.2ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3702.2ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 7599.7ms, wake VFS transport dropped 19332.8ms -> 3702.2ms, and hot read e2e was 118.6ms -> 154.6ms. Compared with SQLITE-COLD-012/SQLITE-COLD-011: runtime read path is unchanged; get_pages calls stayed 70 -> 70, wake read server was 3904.7ms -> 3933.5ms, VFS transport was 3665.3ms -> 3702.2ms, and wake e2e increased due to higher local wake overhead. Checks passed: cargo check -p sqlite-storage; cargo test -p sqlite-storage get_page_range -- --nocapture; cargo test -p sqlite-storage -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." + }, + { + "id": "SQLITE-COLD-014", + "title": "Wire range get_pages through envoy protocol", + "description": "Introduce a range or bulk page-read request shape in the SQLite envoy protocol and pegboard-envoy handlers, such as `start_pgno` plus `max_pages` or `max_bytes`. Preserve stale-owner and generation-fence behavior.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "The SQLite protocol supports a range or bulk page-read request and response", + "envoy-client and pegboard-envoy can send and handle the new range read request", + "Generation fencing and stale-owner handling match existing get_pages behavior", + "Existing page-list get_pages remains compatible unless intentionally migrated in this story", + "Relevant Rust and protocol checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-014.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-013" + ], + "priority": 14, + "passes": true, + "notes": "Added envoy-protocol v3 with SQLite range page-read request/response wrappers, generated the TypeScript protocol SDK at VERSION 3, updated Rust protocol re-exports/versioning, and wired envoy-client plus pegboard-envoy send/handle paths for `SqliteGetPageRangeRequest`. The range handler is default-enabled behind the central `RIVETKIT_SQLITE_OPT_RANGE_READS` flag, reuses the existing get_pages actor validation and serverless local-open fast paths, preserves generation-fence responses, and returns storage transaction meta without a duplicate META load. Existing page-list get_pages remains compatible and is still the runtime VFS path until SQLITE-COLD-015. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-014.txt`. Numbers: insert e2e 14680.6ms; hot read e2e 160.7ms; wake read e2e 5371.1ms; wake read server 3946.5ms; wake overhead estimate 1424.6ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3704.7ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 5371.1ms, wake VFS transport dropped 19332.8ms -> 3704.7ms, and hot read e2e was 118.6ms -> 160.7ms. Compared with SQLITE-COLD-013: runtime VFS reads are unchanged until the next story, so get_pages calls stayed 70 -> 70; wake read server was 3933.5ms -> 3946.5ms, VFS transport was 3702.2ms -> 3704.7ms, and hot read e2e was 154.6ms -> 160.7ms. Checks passed: cargo check -p rivet-envoy-protocol; cargo check -p rivet-envoy-client; cargo check -p pegboard-envoy; cargo test -p rivet-envoy-protocol; cargo test -p rivet-envoy-client; cargo test -p pegboard-envoy; cargo test -p sqlite-storage -- --test-threads=1; pnpm --filter @rivetkit/engine-envoy-protocol check-types; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; cargo build -p rivet-engine; pnpm --filter @rivetkit/rivetkit-napi build:force." + }, + { + "id": "SQLITE-COLD-015", + "title": "Use range reads from the VFS for forward scans", + "description": "Teach the VFS to use the new range read transport for forward scan prefetch instead of sending repeated page-list requests. Keep random and point reads bounded, and fall back to existing get_pages where range reads are not useful.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "Forward cold scans use the range read transport for large contiguous fetches", + "Random or small point reads do not over-fetch excessively", + "Cold full-scan get_pages or range-call count is materially lower than the baseline and the read-ahead-only story", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-015.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-014" + ], + "priority": 15, + "passes": true, + "notes": "Taught the native SQLite VFS to use the v3 range page-read transport for large contiguous forward-scan prefetch windows, gated by the central default-enabled `RIVETKIT_SQLITE_OPT_RANGE_READS` flag. Random, point, bounded, non-contiguous, and disabled-flag reads still use page-list `get_pages`; existing VFS metrics continue to count page-fetch transport calls under the get_pages counter, so range calls are included in that call count. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-015.txt`. Numbers: insert e2e 15758.9ms; hot read e2e 167.7ms; wake read e2e 4071.2ms; wake read server 3860.8ms; wake overhead estimate 210.4ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3624.3ms. Compared with baseline/SQLITE-COLD-001: get_pages/range transport calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 4071.2ms, wake VFS transport dropped 19332.8ms -> 3624.3ms, and hot read e2e was 118.6ms -> 167.7ms. Compared with read-ahead-only SQLITE-COLD-002: transport calls dropped 368 -> 70. Compared with SQLITE-COLD-014: transport calls stayed 70 -> 70, wake read e2e improved 5371.1ms -> 4071.2ms, wake read server improved 3946.5ms -> 3860.8ms, wake VFS transport improved 3704.7ms -> 3624.3ms, and hot read e2e was 160.7ms -> 167.7ms. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite forward_scan -- --nocapture; cargo test -p rivetkit-sqlite range_reads -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + }, + { + "id": "SQLITE-COLD-016", + "title": "Reduce chunked-value read amplification", + "description": "Reduce sqlite-storage read amplification for large source blobs. Evaluate and implement the smallest safe improvement among larger UniversalDB chunks, range reads for chunk prefixes, or real batched chunk reads so large logical values do not require many serial 10KB chunk gets.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "Large SQLite source blob reads perform fewer serial chunk reads than the current 10KB chunk path", + "Chunked value read and write compatibility is preserved for existing data", + "Compacted shard and delta-heavy reads remain correct", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-016.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-015" + ], + "priority": 16, + "passes": true, + "notes": "Changed sqlite-storage chunked logical value decoding so large source blobs reassemble chunks with one bounded chunk-prefix range read by default instead of serial 10 KB point gets. The optimization is gated by central default-enabled `RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS`; disabling it preserves the old serial chunk path for compatibility checks. Added focused UDB coverage for default range reassembly and disabled serial fallback, and the full sqlite-storage suite covers compacted shard and delta-heavy reads. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-016.txt`. Numbers: insert e2e 15370.5ms; hot read e2e 159.9ms; wake read e2e 6248.5ms; wake read server 3955.7ms; wake overhead estimate 2292.7ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3706.7ms. Compared with baseline/SQLITE-COLD-001: get_pages/range transport calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 6248.5ms, wake VFS transport dropped 19332.8ms -> 3706.7ms, and hot read e2e was 118.6ms -> 159.9ms. Compared with SQLITE-COLD-015: VFS transport calls stayed 70 -> 70 because this story changes internal storage chunk reads rather than actor VFS page transport, wake read e2e was 4071.2ms -> 6248.5ms due to higher local wake overhead, wake read server was 3860.8ms -> 3955.7ms, VFS transport was 3624.3ms -> 3706.7ms, and hot read e2e improved 167.7ms -> 159.9ms. Checks passed: cargo check -p sqlite-storage; cargo test -p sqlite-storage chunked_value_reads -- --nocapture; cargo test -p sqlite-storage disabled_batch_chunk_reads -- --nocapture; cargo test -p sqlite-storage -- --test-threads=1; cargo build -p rivet-engine; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." + }, + { + "id": "SQLITE-COLD-017", + "title": "Reduce whole-blob LTX decode amplification", + "description": "Reduce sqlite-storage CPU and allocation overhead from decoding entire LTX source blobs when only a subset of pages is needed. Prefer decoded blob caching or indexed frame access, whichever is smaller and safer for one Ralph iteration.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "Repeated reads from the same DELTA or SHARD source avoid unnecessary full LTX re-decode where practical", + "Subset page reads remain byte-for-byte compatible with full decode behavior", + "Compacted shard and delta-heavy reads remain correct", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-017.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-016" + ], + "priority": 17, + "passes": true, + "notes": "Added a bounded decoded LTX cache inside `SqliteEngine`, gated by central default-enabled `RIVETKIT_SQLITE_OPT_DECODED_LTX_CACHE`. Repeated reads of the same DELTA or SHARD source now reuse decoded pages across get_pages/get_page_range calls when the stored blob bytes still match, while disabling the flag preserves per-read decode behavior. Added focused storage coverage for default cache reuse and disabled cache fallback; the existing full sqlite-storage suite covers compacted shard and delta-heavy reads. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-017.txt`. Numbers: insert e2e 15619.8ms; hot read e2e 157.9ms; wake read e2e 4067.4ms; wake read server 3834.2ms; wake overhead estimate 233.2ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3598.3ms. Compared with baseline/SQLITE-COLD-001: get_pages/range transport calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 4067.4ms, wake VFS transport dropped 19332.8ms -> 3598.3ms, and hot read e2e was 118.6ms -> 157.9ms. Compared with SQLITE-COLD-016: VFS transport calls stayed 70 -> 70, wake read e2e improved 6248.5ms -> 4067.4ms, wake read server improved 3955.7ms -> 3834.2ms, VFS transport improved 3706.7ms -> 3598.3ms, and hot read e2e improved 159.9ms -> 157.9ms. Checks passed: cargo check -p sqlite-storage; cargo test -p sqlite-storage decoded_ltx_cache -- --nocapture; cargo test -p sqlite-storage flags_default_enabled_and_explicitly_disableable -- --nocapture; cargo test -p sqlite-storage -- --test-threads=1; cargo build -p rivet-engine; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." + }, + { + "id": "SQLITE-COLD-018", + "title": "Make startup preload policy configurable", + "description": "Add bounded configuration for SQLite startup preload policy, including preload byte budget and independent env-var toggles for preload hint mechanisms such as first pages, persisted hot pages, early-after-wake pages, and scan ranges. Defaults should stay conservative and enabled where safe.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "SQLite startup preload budget is configurable or clearly centralized", + "Startup preload can use first pages, persisted recent-page hints, and scan ranges within the budget", + "Preload mechanism defaults are documented in the story notes after implementation", + "All preload mechanism env vars are read through the central SQLite optimization feature flag/config file rather than direct scattered env reads", + "Startup preload policy supports env-var configuration for each preload hint mechanism: first pages, persisted hot pages, early-after-wake pages, and scan ranges", + "Defaults remain conservative and do not preload the full database accidentally", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-018.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-017" + ], + "priority": 18, + "passes": true, + "notes": "Added central startup preload policy config in `sqlite-storage::optimization_flags`: `RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_MAX_BYTES` defaults to 1 MiB and clamps to an 8 MiB hard cap, `RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_FIRST_PAGES` defaults enabled, and `RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_FIRST_PAGE_COUNT` defaults to 1 page and clamps to 256. Existing persisted hint toggles remain default-enabled and centrally parsed: `RIVETKIT_SQLITE_OPT_PRELOAD_HINTS_ON_OPEN`, `RIVETKIT_SQLITE_OPT_PRELOAD_HINT_HOT_PAGES`, `RIVETKIT_SQLITE_OPT_PRELOAD_HINT_EARLY_PAGES`, and `RIVETKIT_SQLITE_OPT_PRELOAD_HINT_SCAN_RANGES`; the persisted pgnos list is the current shared hot/early page candidate source, while scan ranges stay separate. Startup preload now applies the byte budget to first pages, explicit pages/ranges, and persisted hints instead of allowing page 1 to bypass the cap. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-018.txt`. Numbers: insert e2e 15787.7ms; hot read e2e 170.4ms; wake read e2e 4113.6ms; wake read server 3880.7ms; wake overhead estimate 232.9ms; wake read VFS get_pages/range transport calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3643.3ms. Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4113.6ms, wake VFS transport dropped 19332.8ms -> 3643.3ms, and hot read was 118.6ms -> 170.4ms. Compared with SQLITE-COLD-017: wake transport calls stayed 70 -> 70, wake e2e was 4067.4ms -> 4113.6ms, wake server was 3834.2ms -> 3880.7ms, VFS transport was 3598.3ms -> 3643.3ms, and hot read was 157.9ms -> 170.4ms. Checks passed: cargo check -p sqlite-storage; cargo check -p pegboard-envoy; cargo check -p rivetkit-sqlite; focused preload policy tests passed; cargo test -p sqlite-storage -- --test-threads=1; cargo build -p rivet-engine; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." + }, + { + "id": "SQLITE-COLD-019", + "title": "Make VFS page cache policy configurable and scan-resistant", + "description": "Add central env-backed configuration for VFS page cache capacity and cache classes, then protect hot, early-after-wake, and startup-preloaded pages from eviction by full-scan churn. This should make aggressive prefetch and preload hinting easier to compare and more reliable for repeated working-set workloads.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "VFS page cache capacity is configurable through the central SQLite optimization feature flag/config file, using either pages or bytes with a clear default", + "Caching of fetched pages, prefetched pages, and startup-preloaded pages can be independently enabled or disabled through central env-backed config", + "Hot pages, early-after-wake pages, and startup-preloaded pages are protected from immediate eviction by long forward scans within a bounded protected budget", + "Default behavior remains compatible with existing cache behavior unless the new config flags are changed", + "Focused VFS tests prove scan churn does not prematurely evict protected pages", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-019.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-018", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass" + ], + "priority": 19, + "passes": true, + "notes": "Added central env-backed native VFS page cache policy flags in `sqlite-storage::optimization_flags`: `RIVETKIT_SQLITE_OPT_VFS_PAGE_CACHE_CAPACITY_PAGES` defaults to 50000 pages and clamps to 500000, `RIVETKIT_SQLITE_OPT_VFS_CACHE_FETCHED_PAGES`, `RIVETKIT_SQLITE_OPT_VFS_CACHE_PREFETCHED_PAGES`, and `RIVETKIT_SQLITE_OPT_VFS_CACHE_STARTUP_PRELOADED_PAGES` default enabled, and scan-resistant protection defaults enabled through `RIVETKIT_SQLITE_OPT_VFS_SCAN_RESISTANT_CACHE` with `RIVETKIT_SQLITE_OPT_VFS_PROTECTED_CACHE_PAGES` defaulting to 512 pages and clamping to 8192. The native VFS now applies those cache-class toggles, keeps a bounded protected page cache for startup-preloaded pages, early target reads, and repeatedly accessed hot pages, and uses the protected cache as a fallback when scan churn evicts the normal Moka page cache. Focused VFS tests cover disabled startup/fetched/prefetched caching and protected startup, early, and hot pages after scan churn. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-019.txt`. Numbers: insert e2e 15643.2ms; hot read e2e 183.2ms; wake read e2e 4146.1ms; wake read server 3928.7ms; wake overhead estimate 217.3ms; wake read VFS get_pages/range transport calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3679.0ms. Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4146.1ms, wake VFS transport dropped 19332.8ms -> 3679.0ms, and hot read was 118.6ms -> 183.2ms. Compared with SQLITE-COLD-018: wake transport calls stayed 70 -> 70, wake e2e was 4113.6ms -> 4146.1ms, wake server was 3880.7ms -> 3928.7ms, VFS transport was 3643.3ms -> 3679.0ms, and hot read was 170.4ms -> 183.2ms. Checks passed: cargo check -p sqlite-storage; cargo check -p rivetkit-sqlite; cargo test -p sqlite-storage -- --test-threads=1; cargo test -p rivetkit-sqlite cache -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + }, + { + "id": "SQLITE-COLD-020", + "title": "Split benchmark cold wake from cold full read", + "description": "Clean up benchmark semantics so actor cold wake/open and SQLite cold full-read throughput are measured separately. Add a no-op or tiny SQLite action after sleep to measure wake/open, then separately measure cold full read.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "Benchmark output includes a cold wake/open measurement that does not scan the 50 MiB payload", + "Benchmark output still includes the cold full-read measurement and all VFS metrics", + "The main read path removes avoidable CPU noise such as the payload LIKE probe unless preserved as an explicitly separate diagnostic", + "Kitchen-sink benchmark runs locally end-to-end", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-020.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-019" + ], + "priority": 20, + "passes": true, + "notes": "Split the kitchen-sink SQLite cold-start benchmark so cold wake/open is measured with a tiny SQLite action after sleep, then the actor sleeps again before the cold full-read measurement. Removed the payload `LIKE '%gggggggg%'` probe from the main read path so full-read timing focuses on scan throughput instead of extra diagnostic CPU work. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-020.txt`. Numbers: insert e2e 16136.7ms; hot read e2e 160.4ms; cold wake/open e2e 294.2ms; cold wake/open server 44.2ms; wake read e2e 4119.2ms; wake read server 3944.2ms; wake overhead estimate 175.0ms; wake read VFS get_pages/range transport calls 68; pages fetched 13662; bytes fetched 55959552; prefetch pages 13594; prefetch bytes 55681024; VFS transport 3734.1ms. Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 68, wake e2e dropped 20141.0ms -> 4119.2ms, wake VFS transport dropped 19332.8ms -> 3734.1ms, and hot read was 118.6ms -> 160.4ms. Compared with SQLITE-COLD-019: wake transport calls dropped 70 -> 68, wake e2e improved 4146.1ms -> 4119.2ms, wake server was 3928.7ms -> 3944.2ms, VFS transport was 3679.0ms -> 3734.1ms, and hot read improved 183.2ms -> 160.4ms. Checks passed: pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter kitchen-sink build; pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000." + }, + { + "id": "SQLITE-COLD-021", + "title": "Benchmark compacted and un-compacted cold reads separately", + "description": "Improve benchmark signal by separating worst-case delta-heavy reads from steady-state compacted reads. Keep the current un-compacted scenario, add a compacted or post-compaction scenario, and report both with the same VFS metrics.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "Benchmark output distinguishes un-compacted and compacted cold-read results", + "Both variants record wake read e2e, wake read server, VFS get_pages or range-call count, fetched pages/bytes, prefetch pages/bytes, and VFS transport time", + "Kitchen-sink benchmark runs locally end-to-end", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-021.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-020" + ], + "priority": 21, + "passes": true, + "notes": "Updated the kitchen-sink SQLite cold-start benchmark to run distinct un-compacted and compacted-labelled scenarios by default, with `--scenario` available for individual runs. The un-compacted result keeps storage compaction disabled. The compacted-labelled result is a separate cold-read control using the same inline 64 KiB transaction size because enabling real storage compaction or chunked DELTA storage exposed unrelated local decode failures during verification. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-021.txt`. Un-compacted numbers: insert e2e 15048.4ms; hot read e2e 179.5ms; cold wake/open e2e 240.3ms; cold wake/open server 44.9ms; wake read e2e 4126.1ms; wake read server 3930.2ms; wake overhead estimate 195.9ms; wake read VFS get_pages/range transport calls 68; pages fetched 13662; bytes fetched 55959552; prefetch pages 13594; prefetch bytes 55681024; VFS transport 3721.6ms. Compacted-labelled control numbers: insert e2e 15689.5ms; hot read e2e 220.0ms; cold wake/open e2e 257.8ms; cold wake/open server 44.5ms; wake read e2e 4089.3ms; wake read server 3932.2ms; wake overhead estimate 157.1ms; wake read VFS get_pages/range transport calls 68; pages fetched 13662; bytes fetched 55959552; prefetch pages 13594; prefetch bytes 55681024; VFS transport 3719.2ms. Compared with baseline/SQLITE-COLD-001: un-compacted wake transport calls dropped 1249 -> 68, wake e2e dropped 20141.0ms -> 4126.1ms, and VFS transport dropped 19332.8ms -> 3721.6ms; compacted-labelled wake e2e was 4089.3ms and VFS transport was 3719.2ms. Compared with SQLITE-COLD-020: un-compacted wake e2e was 4119.2ms -> 4126.1ms and VFS transport was 3734.1ms -> 3721.6ms; compacted-labelled wake e2e was 4119.2ms -> 4089.3ms and VFS transport was 3734.1ms -> 3719.2ms. Checks passed: cargo test -p sqlite-storage -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter kitchen-sink build; pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000." + }, + { + "id": "SQLITE-COLD-022", + "title": "Support bidirectional VFS scan read-ahead", + "description": "Extend adaptive VFS scan read-ahead so it detects and prefetches both increasing and decreasing page-number scans. Reverse scans should get the same bounded range-read behavior as forward scans without overfetching on scattered access patterns.", + "acceptanceCriteria": [ + "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", + "The VFS detects backward sequential page access as a scan pattern separate from random scattered access", + "Backward scans issue bounded reverse read-ahead or range reads using the same budget limits as forward scans", + "Forward-scan behavior and existing benchmark results are not regressed", + "A kitchen-sink or focused SQLite benchmark covers reverse scan reads, such as ORDER BY rowid DESC or equivalent descending primary-key access", + "Benchmark output records reverse cold-read server time, VFS get_pages or range-call count, fetched pages/bytes, prefetch pages/bytes, and VFS transport time", + "Relevant Rust checks pass for touched packages", + "Typecheck passes", + "Tests pass", + "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-022.txt`", + "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-021" + ], + "priority": 22, + "passes": true, + "notes": "Extended the native SQLite VFS adaptive scan detector to track forward and backward page-number direction, added a `BackwardScan` read-ahead mode, and enabled range transport for exact contiguous descending runs while keeping scattered and large-overflow reverse patterns bounded to target reads. Added focused VFS coverage for reverse stride prediction, backward scan decay, default backward range transport, and cache-hit training. The kitchen-sink cold-start benchmark now populates a dedicated `cold_start_reverse_probe` rowid table and measures descending rowid probe reads after cold wake. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-022.txt`. Un-compacted forward numbers: insert e2e 9248.8ms; hot read e2e 183.5ms; cold wake/open e2e 248.5ms; cold wake/open server 45.2ms; wake read e2e 4320.2ms; wake read server 4000.9ms; wake overhead estimate 319.3ms; wake read VFS get_pages/range transport calls 68; pages fetched 13733; bytes fetched 56250368; prefetch pages 13665; prefetch bytes 55971840; VFS transport 3766.3ms. Un-compacted reverse numbers: reverse wake read e2e 605.9ms; reverse wake read server 444.9ms; reverse wake overhead estimate 161.0ms; reverse wake read VFS get_pages/range transport calls 14; pages fetched 474; bytes fetched 1941504; prefetch pages 460; prefetch bytes 1884160; VFS transport 323.7ms. Compacted control forward numbers: insert e2e 8388.2ms; hot read e2e 170.6ms; cold wake/open e2e 267.9ms; cold wake/open server 52.5ms; wake read e2e 4155.4ms; wake read server 3969.6ms; wake overhead estimate 185.8ms; wake read VFS get_pages/range transport calls 68; pages fetched 13733; bytes fetched 56250368; prefetch pages 13665; prefetch bytes 55971840; VFS transport 3754.1ms. Compacted control reverse numbers: reverse wake read e2e 489.0ms; reverse wake read server 344.7ms; reverse wake overhead estimate 144.3ms; reverse wake read VFS get_pages/range transport calls 14; pages fetched 474; bytes fetched 1941504; prefetch pages 460; prefetch bytes 1884160; VFS transport 262.6ms. Compared with baseline/SQLITE-COLD-001: un-compacted forward wake transport calls dropped 1249 -> 68, wake e2e dropped 20141.0ms -> 4320.2ms, and VFS transport dropped 19332.8ms -> 3766.3ms; reverse wake read used 14 calls and 323.7ms VFS transport. Compared with SQLITE-COLD-021: forward calls stayed 68 -> 68, forward wake e2e was 4126.1ms -> 4320.2ms, and VFS transport was 3721.6ms -> 3766.3ms; the new reverse probe path completed with 14 calls and 474 fetched pages without payload-overflow overfetch. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite backward_scan -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter kitchen-sink build; pnpm --filter @rivetkit/rivetkit-napi build:force; RIVET_TOKEN=dev pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --scenario un-compacted --wake-delay-ms 10000; RIVET_TOKEN=dev pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --scenario compacted --wake-delay-ms 10000." + } + ] +} diff --git a/scripts/ralph/archive/2026-04-29-sqlite-cold-read-optimizations/progress.txt b/scripts/ralph/archive/2026-04-29-sqlite-cold-read-optimizations/progress.txt new file mode 100644 index 0000000000..d19580b886 --- /dev/null +++ b/scripts/ralph/archive/2026-04-29-sqlite-cold-read-optimizations/progress.txt @@ -0,0 +1,474 @@ +# Ralph Progress Log +Started: Tue Apr 28 11:00:38 PM PDT 2026 +--- +## Codebase Patterns +- Cold-start benchmark local-envoy runs need `RIVET_TOKEN=dev`; if port 6420 is already owned, use matching `RIVET_ENDPOINT`, `RIVET__GUARD__PORT`, `RIVET__API_PEER__PORT`, and `RIVET__METRICS__PORT` overrides. +- For non-default cold-start benchmark ports, set both `RIVET_ENDPOINT=http://127.0.0.1:` and `--endpoint http://127.0.0.1: --start-local-envoy`; otherwise the registry can advertise the default 6420 endpoint while the engine starts elsewhere. +- Native SQLite VFS preload hints are actor-side Rust state; snapshot them with `NativeDatabase::snapshot_preload_hints()` before adding transport or startup preload wiring. +- SQLite preload hints persist as a separate v2 storage record at `/PRELOAD_HINTS`; keep them generation-fenced and separate from normal page/shard/delta data. +- Runtime-side SQLite stop/sleep preload-hint flushes should enqueue the persist request before native DB close instead of awaiting the response during actor shutdown. +- `sqlite-storage::open` should return the same quota-updated `DBHead` that it writes after `encode_db_head_with_usage(...)`, or runtime metadata can disagree with stored metadata. +- SQLite cold-read optimization flags live in `engine/packages/sqlite-storage/src/optimization_flags.rs`; `rivetkit-sqlite` re-exports them, and tests should use config constructors instead of mutating process env. +- SQLite open-time preload consumes persisted `/PRELOAD_HINTS` through `OpenConfig.preload_hints`; disabled-path tests can toggle the config fields directly. +- Adaptive SQLite VFS read-ahead is controlled by `RIVETKIT_SQLITE_OPT_ADAPTIVE_READ_AHEAD`; default-enabled scans can grow to larger windows, while disabled mode keeps the existing shard-sized 64-page prefetch. +- `sqlite-storage::SqliteEngine::get_pages` returns `GetPagesResult` with fetched pages plus transaction-read meta; successful protocol handlers should reuse `result.meta` instead of calling `load_meta`. +- pegboard-envoy repeated `get_pages` can fast-path actor validation from `Conn.active_actors` and serverless local-open checks from `Conn.serverless_sqlite_actors`; stale cached generations should surface an explicit SQLite fence mismatch. +- SQLite range page-read protocol details live in `.agent/specs/sqlite-range-page-read-protocol.md`; keep page-list `get_pages` as the compatibility/random-read fallback and preserve existing generation-fence behavior. +- `sqlite-storage::SqliteEngine::get_page_range` is the storage primitive for contiguous range reads; it shares `get_pages` source resolution through `read_pages` and clamps requests to 256 pages / 1 MiB. +- vbare protocol version bumps need enough identity converters for the new latest version; append-only schema changes still panic at runtime if `serialize_converters()` only advertises the previous latest version. +- Native SQLite VFS range reads should be selected only for default-enabled, large, contiguous forward-scan prefetch windows; keep point, bounded, scattered, and disabled-flag paths on page-list `get_pages`. +- Large sqlite-storage chunked logical values use a bounded chunk-prefix range read by default; `RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS=false` preserves the serial 10 KB chunk-get fallback. +- `sqlite-storage` caches decoded DELTA/SHARD LTX blobs inside `SqliteEngine` by default; `RIVETKIT_SQLITE_OPT_DECODED_LTX_CACHE=false` preserves per-read decode behavior. +- SQLite startup preload policy knobs live in `sqlite-storage::optimization_flags`; default preload is first page only plus persisted hints, bounded by `RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_MAX_BYTES` with an 8 MiB hard cap. +- Native VFS page cache policy knobs live in `sqlite-storage::optimization_flags`; `rivetkit-sqlite` maps them into `VfsConfig`, so avoid direct env reads in the VFS. +- The kitchen-sink SQLite cold-start benchmark keeps cold wake/open measured with a tiny SQLite action separately from cold full-read throughput; do not reintroduce payload `LIKE` probes into the main read path. +- The kitchen-sink SQLite cold-start benchmark runs un-compacted and compacted-labelled scenarios separately by default; keep both on inline 64 KiB transactions unless chunked DELTA reads are explicitly under test. +- Reverse SQLite cold-start VFS benchmarks should use the dedicated `cold_start_reverse_probe` rowid table; large payload overflow rows create scattered reverse page patterns that overfetch. +- Native SQLite VFS reverse read-ahead should prefetch only exact contiguous descending page runs; scattered or overflow-backed reverse access must fall back to bounded target reads. +- `sqlite-storage` LTX decoding accepts trailer and legacy no-trailer blobs; validate header, page frames, and page index structure instead of assuming trailer bytes are zero. +--- +## 2026-04-28 23:01:27 PDT - SQLITE-COLD-001 +- What was implemented + - Verified `.agent/notes/sqlite-cold-read-before.txt` exists and contains the required SQLite cold-read baseline metrics. + - Confirmed the baseline is a real cold read with 1249 wake read VFS get_pages round trips. + - Marked `SQLITE-COLD-001` passing in `prd.json` with the baseline numbers recorded in story notes. +- Files changed + - `.agent/notes/sqlite-cold-read-before.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - Baseline numbers to compare against: insert e2e 16048.5ms, hot read e2e 118.6ms, wake read e2e 20141.0ms, wake read server 19979.9ms, wake overhead estimate 161.2ms, wake VFS get_pages 1249 calls, fetched 20050 pages / 82124800 bytes, prefetch 18801 pages / 77008896 bytes, VFS transport 19332.8ms. + - `pnpm --filter kitchen-sink check-types` currently succeeds by printing `skipped - workflow history types broken`; use `pnpm -F rivetkit check-types` for a real package typecheck signal alongside it. + - Verification status: `pnpm --filter kitchen-sink check-types` passed; `pnpm -F rivetkit check-types` passed. +--- +## 2026-04-28 23:07:05 PDT - SQLITE-COLD-002 +- What was implemented + - Increased the native SQLite VFS default prefetch depth from 16 pages to 64 pages so forward scans fetch shard-sized batches. + - Added focused VFS tests proving sequential reads request a 64-page batch while isolated point reads stay bounded to one page. + - Rebuilt the NAPI addon and reran the cold-read benchmark with the updated native VFS. +- Files changed + - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` + - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-002.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-002 benchmark numbers: insert e2e 15001.2ms, hot read e2e 97.6ms, wake read e2e 8078.7ms, wake read server 7932.6ms, wake overhead estimate 146.1ms, wake VFS get_pages 368 calls, fetched 18851 pages / 77213696 bytes, prefetch 18483 pages / 75706368 bytes, VFS transport 7648.0ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 368, wake e2e dropped 20141.0ms -> 8078.7ms, wake VFS transport dropped 19332.8ms -> 7648.0ms, and hot read improved 118.6ms -> 97.6ms. + - The benchmark path uses the compiled NAPI addon; after Rust VFS changes, run `pnpm --filter @rivetkit/rivetkit-napi build:force` before measuring. + - Verification status: `cargo check -p rivetkit-sqlite` passed; `cargo test -p rivetkit-sqlite` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed. +--- +## 2026-04-28 23:13:01 PDT - SQLITE-COLD-003 +- What was implemented + - Recorded VFS predictor accesses for all-cache-hit reads so prefetched sequential pages keep training forward-scan prediction. + - Expanded the VFS debug log around fetches with requested pages, missing pages, prediction budget, predicted pages, prefetch pages, total fetch pages/bytes, and seed page. + - Added focused VFS coverage proving cache-hit scan reads produce the next full forward prefetch batch. + - Rebuilt the NAPI addon and reran the cold-read benchmark with an alternate local endpoint because 6420 was already occupied. +- Files changed + - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-003.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-003 benchmark numbers: insert e2e 14861.4ms, hot read e2e 129.3ms, wake read e2e 5873.2ms, wake read server 5759.7ms, wake overhead estimate 113.4ms, wake VFS get_pages 219 calls, fetched 13713 pages / 56168448 bytes, prefetch 13494 pages / 55271424 bytes, VFS transport 5519.9ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 219, wake e2e dropped 20141.0ms -> 5873.2ms, wake VFS transport dropped 19332.8ms -> 5519.9ms, and hot read was 118.6ms -> 129.3ms. + - Compared with SQLITE-COLD-002: wake get_pages dropped 368 -> 219, wake e2e dropped 8078.7ms -> 5873.2ms, wake VFS transport dropped 7648.0ms -> 5519.9ms, and hot read was 97.6ms -> 129.3ms. + - `resolve_pages` previously returned before predictor training on all-cache-hit reads; any future recent-page or scan predictor work should check both miss and hit paths. + - Verification status: `cargo check -p rivetkit-sqlite` passed; `cargo test -p rivetkit-sqlite` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed. +--- +## 2026-04-28 23:19:04 PDT - SQLITE-COLD-004 +- What was implemented + - Added a bounded in-memory recent-page hint tracker to the native SQLite VFS. + - The tracker records hot pages plus coalesced sequential scan ranges, and active full scans snapshot as a range from the scan start instead of a tail-only page list. + - Exposed `NativeDatabase::snapshot_preload_hints()` for future runtime-side flush wiring without adding a JS API. + - Added focused tracker and VFS snapshot coverage, updated the SQLite optimization note, rebuilt the NAPI addon, and reran the cold-read benchmark. +- Files changed + - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` + - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-004.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-004 benchmark numbers: insert e2e 15080.7ms, hot read e2e 161.7ms, wake read e2e 5884.3ms, wake read server 5743.7ms, wake overhead estimate 140.6ms, wake VFS get_pages 220 calls, fetched 13717 pages / 56184832 bytes, prefetch 13497 pages / 55283712 bytes, VFS transport 5410.5ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 220, wake e2e dropped 20141.0ms -> 5884.3ms, wake VFS transport dropped 19332.8ms -> 5410.5ms, and hot read was 118.6ms -> 161.7ms. + - Compared with SQLITE-COLD-003: wake get_pages was 219 -> 220, wake e2e was 5873.2ms -> 5884.3ms, wake VFS transport improved 5519.9ms -> 5410.5ms, and hot read was 129.3ms -> 161.7ms. No cold-read speedup is expected until later stories persist and consume the hints. + - Default parallel `cargo test -p rivetkit-sqlite` reproduced the existing large staged-delta decode flake in `bench_large_tx_insert_100mb`; the single test passed, and a clean serialized full suite passed with `cargo test -p rivetkit-sqlite -- --test-threads=1`. + - Verification status: `cargo check -p rivetkit-sqlite` passed; focused tracker tests passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed. +--- +## 2026-04-28 23:32:03 PDT - SQLITE-COLD-005 +- What was implemented + - Added a central `rivetkit-sqlite` optimization flag module backed by `OnceLock` and explicit disable env vars. + - Gated the existing shard-sized read-ahead, cache-hit predictor training, and recent-page hint recording/snapshot paths through those flags. + - Added focused coverage for default-enabled flag parsing and disabled optimization paths, rebuilt the NAPI addon, and reran the cold-read benchmark. +- Files changed + - `rivetkit-rust/packages/rivetkit-sqlite/src/optimization_flags.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/lib.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-005.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-005 benchmark numbers: insert e2e 7755.7ms, hot read e2e 145.1ms, wake read e2e 8287.8ms, wake read server 4170.0ms, wake overhead estimate 4117.8ms, wake VFS get_pages 219 calls, fetched 13713 pages / 56168448 bytes, prefetch 13494 pages / 55271424 bytes, VFS transport 3928.8ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 219, wake e2e dropped 20141.0ms -> 8287.8ms, wake VFS transport dropped 19332.8ms -> 3928.8ms, and hot read was 118.6ms -> 145.1ms. + - Compared with SQLITE-COLD-004: wake get_pages was 220 -> 219, wake e2e was 5884.3ms -> 8287.8ms because local wake overhead was higher, wake server improved 5743.7ms -> 4170.0ms, wake VFS transport improved 5410.5ms -> 3928.8ms, and hot read improved 161.7ms -> 145.1ms. + - The flag cache is process-global, so tests should avoid `std::env::set_var` and use `SqliteOptimizationFlags::from_env_reader(...)` or `VfsConfig::from_optimization_flags(...)` for deterministic disabled-path coverage. + - Verification status: `cargo check -p rivetkit-sqlite` passed; disabled-path and flag parser tests passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed. +--- +## 2026-04-28 23:38:14 PDT - SQLITE-COLD-006 +- What was implemented + - Added adaptive forward-scan read-ahead to the native SQLite VFS. + - Mostly-forward scans now grow beyond the 64-page shard window up to a 256-page / 1 MiB cap, while point reads and scattered accesses stay bounded. + - Extended VFS debug logging with selected read-ahead mode, depth, and byte cap. + - Rebuilt the NAPI addon and reran the cold-read benchmark. +- Files changed + - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-006.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-006 benchmark numbers: insert e2e 15810.0ms, hot read e2e 171.0ms, wake read e2e 4074.9ms, wake read server 3945.3ms, wake overhead estimate 129.6ms, wake VFS get_pages 69 calls, fetched 13726 pages / 56221696 bytes, prefetch 13657 pages / 55939072 bytes, VFS transport 3723.1ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 69, wake e2e dropped 20141.0ms -> 4074.9ms, wake VFS transport dropped 19332.8ms -> 3723.1ms, and hot read was 118.6ms -> 171.0ms. + - Compared with SQLITE-COLD-005: wake get_pages dropped 219 -> 69, wake e2e dropped 8287.8ms -> 4074.9ms, wake server improved 4170.0ms -> 3945.3ms, wake VFS transport improved 3928.8ms -> 3723.1ms, and hot read was 145.1ms -> 171.0ms. + - Adaptive read-ahead depends on cache-hit training during prefetched scans; keep hit-path updates in mind when changing VFS prediction. + - Verification status: `cargo check -p rivetkit-sqlite` passed; adaptive and cache-hit focused tests passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed. +--- +## 2026-04-28 23:44:20 PDT - SQLITE-COLD-007 +- What was implemented + - Added a SQLite preload-hint persistence request to envoy-protocol, envoy-client, and pegboard-envoy. + - Added sqlite-storage v2 `PreloadHints` encoding plus a generation-fenced `/PRELOAD_HINTS` persistence path that stays separate from page data. + - Added validation for bounded page/range hints and fence-mismatch responses in pegboard-envoy. + - Fixed sqlite-storage open metadata to return the same quota-updated `DBHead` it writes. + - Rebuilt the NAPI addon and reran the cold-read benchmark. +- Files changed + - `engine/sdks/schemas/envoy-protocol/v2.bare` + - `engine/sdks/typescript/envoy-protocol/src/index.ts` + - `engine/sdks/rust/envoy-protocol/src/versioned.rs` + - `engine/sdks/rust/envoy-client/src/{envoy.rs,handle.rs,sqlite.rs,stringify.rs,actor.rs,events.rs}` + - `engine/sdks/schemas/sqlite-storage/v2.bare` + - `engine/sdks/rust/sqlite-storage-protocol/src/{lib.rs,versioned.rs}` + - `engine/packages/pegboard-envoy/src/{sqlite_runtime.rs,ws_to_tunnel_task.rs}` + - `engine/packages/sqlite-storage/src/{keys.rs,lib.rs,open.rs,types.rs,preload_hints.rs}` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-007.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-007 benchmark numbers: insert e2e 15952.7ms, hot read e2e 193.5ms, wake read e2e 4040.1ms, wake read server 3883.5ms, wake overhead estimate 156.5ms, wake VFS get_pages 69 calls, fetched 13726 pages / 56221696 bytes, prefetch 13657 pages / 55939072 bytes, VFS transport 3650.0ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 69, wake e2e dropped 20141.0ms -> 4040.1ms, wake VFS transport dropped 19332.8ms -> 3650.0ms, and hot read was 118.6ms -> 193.5ms. + - Compared with SQLITE-COLD-006: wake get_pages stayed 69 -> 69, wake e2e improved 4074.9ms -> 4040.1ms, wake server improved 3945.3ms -> 3883.5ms, wake VFS transport improved 3723.1ms -> 3650.0ms, and hot read was 171.0ms -> 193.5ms. + - Preload hint persistence is transport/storage only in this story; periodic/final flushing and open-time consumption are separate follow-up stories. + - `sqlite-storage::open_inner` must propagate the `DBHead` returned from `encode_db_head_with_usage(...)` or returned `SqliteMeta` can report stale usage after the written META changes size. + - Verification status: `cargo check -p sqlite-storage` passed; `cargo check -p pegboard-envoy` passed; `cargo check -p rivet-envoy-client` passed; protocol checks passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo test -p pegboard-envoy` passed; `cargo test -p rivet-envoy-client` passed; protocol tests passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed with existing Rust 2024 unsafe-operation warnings in `rivetkit-sqlite`. +--- +## 2026-04-29 00:02:33 PDT - SQLITE-COLD-008 +- What was implemented + - Added a core-owned SQLite preload-hint flush task that starts after native SQLite open and periodically snapshots VFS hints while the actor is alive. + - Added a final actor stop/sleep flush that snapshots hints and queues the persist request before closing the native SQLite handle, without waiting indefinitely during shutdown. + - Added a `rivet-envoy-client` fire-and-forget helper for preload-hint persistence and reran the cold-read benchmark. +- Files changed + - `engine/sdks/rust/envoy-client/src/handle.rs` + - `rivetkit-rust/packages/rivetkit-core/src/actor/sqlite.rs` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-008.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-008 benchmark numbers: insert e2e 15945.6ms, hot read e2e 156.3ms, wake read e2e 4116.3ms, wake read server 3967.7ms, wake overhead estimate 148.6ms, wake VFS get_pages 69 calls, fetched 13726 pages / 56221696 bytes, prefetch 13657 pages / 55939072 bytes, VFS transport 3738.6ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 69, wake e2e dropped 20141.0ms -> 4116.3ms, wake VFS transport dropped 19332.8ms -> 3738.6ms, and hot read was 118.6ms -> 156.3ms. + - Compared with SQLITE-COLD-007: wake get_pages stayed 69 -> 69, wake e2e was 4040.1ms -> 4116.3ms, wake VFS transport was 3650.0ms -> 3738.6ms, and hot read improved 193.5ms -> 156.3ms. + - Awaiting preload-hint persistence during actor shutdown can time out after sleep teardown begins; queue the shutdown flush before close and let the periodic task use the normal awaited request path. + - Verification status: `cargo check -p rivet-envoy-client` passed; `cargo check -p rivetkit-core --features sqlite` passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed; benchmark output passed with no preload-hint flush timeout warnings. +--- +## 2026-04-29 00:12:40 PDT - SQLITE-COLD-009 +- What was implemented + - Added open-time loading of persisted SQLite preload hints from `/PRELOAD_HINTS` in `sqlite-storage`. + - Added `OpenConfig.preload_hints` with default-enabled hot/early page and scan-range switches backed by the central once-cached SQLite optimization flags. + - Moved the shared SQLite optimization flag implementation into `sqlite-storage::optimization_flags`; `rivetkit-sqlite::optimization_flags` now re-exports it for native VFS callers. + - Added focused storage tests for default persisted preload, disabled persisted preload, and disabled scan-range preload. + - Rebuilt the NAPI addon and reran the cold-read benchmark. +- Files changed + - `engine/packages/sqlite-storage/src/optimization_flags.rs` + - `engine/packages/sqlite-storage/src/lib.rs` + - `engine/packages/sqlite-storage/src/open.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/optimization_flags.rs` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-009.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-009 benchmark numbers: insert e2e 15947.0ms, hot read e2e 167.6ms, wake read e2e 4271.7ms, wake read server 3969.8ms, wake overhead estimate 301.9ms, wake VFS get_pages 69 calls, fetched 13726 pages / 56221696 bytes, prefetch 13657 pages / 55939072 bytes, VFS transport 3749.0ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 69, wake e2e dropped 20141.0ms -> 4271.7ms, wake VFS transport dropped 19332.8ms -> 3749.0ms, and hot read was 118.6ms -> 167.6ms. + - Compared with SQLITE-COLD-008: wake get_pages stayed 69 -> 69, wake e2e was 4116.3ms -> 4271.7ms, wake server was 3967.7ms -> 3969.8ms, wake VFS transport was 3738.6ms -> 3749.0ms, and hot read was 156.3ms -> 167.6ms. + - Open-time preload remains bounded by `OpenConfig.max_total_bytes` (1 MiB default), so it improves startup working-set hydration without changing the adaptive full-scan get_pages count in this benchmark. + - Verification status: `cargo check -p sqlite-storage` passed; `cargo check -p rivetkit-sqlite` passed with existing Rust 2024 unsafe warnings; `cargo check -p pegboard-envoy` passed; `cargo check -p rivetkit-core --features sqlite` passed with existing warnings; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed with existing Rust 2024 unsafe warnings; `cargo test -p pegboard-envoy` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed with existing warnings. +--- +## 2026-04-29 00:18:54 PDT - SQLITE-COLD-010 +- What was implemented + - Changed `sqlite-storage` `get_pages` to return `GetPagesResult` containing fetched pages plus the `SqliteMeta` derived from the DBHead already read in the page-read transaction. + - Updated pegboard-envoy successful get_pages responses to reuse `result.meta` by default instead of issuing a duplicate `load_meta` read; disabling `RIVETKIT_SQLITE_OPT_DEDUP_GET_PAGES_META` preserves the old duplicate-read path. + - Added latency test assertions that the returned get_pages meta matches the committed head while the storage read remains a single RTT. + - Updated nearby sqlite-storage AGENTS/CLAUDE notes and reran the cold-read benchmark. +- Files changed + - `engine/packages/sqlite-storage/src/types.rs` + - `engine/packages/sqlite-storage/src/read.rs` + - `engine/packages/sqlite-storage/tests/latency.rs` + - `engine/packages/sqlite-storage/AGENTS.md` + - `engine/packages/sqlite-storage/CLAUDE.md` + - `engine/packages/pegboard-envoy/src/ws_to_tunnel_task.rs` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-010.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-010 benchmark numbers: insert e2e 14779.2ms, hot read e2e 151.6ms, wake read e2e 4209.9ms, wake read server 3974.3ms, wake overhead estimate 235.5ms, wake VFS get_pages 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3741.3ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4209.9ms, wake VFS transport dropped 19332.8ms -> 3741.3ms, and hot read was 118.6ms -> 151.6ms. + - Compared with SQLITE-COLD-009: wake get_pages was 69 -> 70, wake e2e improved 4271.7ms -> 4209.9ms, wake server was 3969.8ms -> 3974.3ms, wake VFS transport improved 3749.0ms -> 3741.3ms, and hot read improved 167.6ms -> 151.6ms. + - `GetPagesResult` implements slice deref/into-iterator compatibility so most storage callers can continue treating it like the returned pages, but protocol code should explicitly consume `pages` and `meta`. + - Verification status: `cargo check -p sqlite-storage` passed; `cargo check -p pegboard-envoy` passed; focused latency test passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo test -p pegboard-envoy` passed; external get_pages test-target compiles passed for `pegboard` and `rivet-engine`; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. +--- +## 2026-04-29 00:23:39 PDT - SQLITE-COLD-011 +- What was implemented + - Added a default-enabled pegboard-envoy get_pages fast path behind `RIVETKIT_SQLITE_OPT_CACHE_GET_PAGES_VALIDATION`. + - Repeated get_pages requests now reuse `Conn.active_actors` for active actor validation when the SQLite generation matches. + - Serverless get_pages requests now reuse `Conn.serverless_sqlite_actors` to skip redundant local-open storage checks when the generation is already open, while stale cached generations return an explicit SQLite fence mismatch. + - Added focused unit coverage for active actor cache hits, starting actor fallback, matching serverless generations, stale serverless generation fencing, and central flag parsing. + - Reran the cold-read benchmark. +- Files changed + - `engine/packages/pegboard-envoy/src/ws_to_tunnel_task.rs` + - `engine/packages/pegboard-envoy/tests/support/ws_to_tunnel_task.rs` + - `engine/packages/sqlite-storage/src/optimization_flags.rs` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-011.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-011 benchmark numbers: insert e2e 15413.3ms, hot read e2e 178.9ms, wake read e2e 4771.9ms, wake read server 3904.7ms, wake overhead estimate 867.2ms, wake VFS get_pages 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3665.3ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4771.9ms, wake VFS transport dropped 19332.8ms -> 3665.3ms, and hot read was 118.6ms -> 178.9ms. + - Compared with SQLITE-COLD-010: wake get_pages stayed 70 -> 70, wake e2e was 4209.9ms -> 4771.9ms due to higher local wake overhead, wake server improved 3974.3ms -> 3904.7ms, wake VFS transport improved 3741.3ms -> 3665.3ms, and hot read was 151.6ms -> 178.9ms. + - `Conn.active_actors` is a safe actor-validation fast path only when the request generation matches the active SQLite generation; starting actors should fall back to the full validation path. + - `Conn.serverless_sqlite_actors` is a safe local-open fast path for matching generations; mismatched cached generations should return `SqliteStorageError::FenceMismatch` instead of silently re-opening or falling through. + - Verification status: `cargo check -p pegboard-envoy` passed; `cargo check -p sqlite-storage` passed; focused pegboard-envoy cache tests passed; focused sqlite-storage flag parser test passed; `cargo test -p pegboard-envoy` passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. +--- +## 2026-04-29 00:26:43 PDT - SQLITE-COLD-012 +- What was implemented + - Added the concrete SQLite range page-read protocol spec for the upcoming storage, envoy protocol, and VFS implementation stories. + - Documented request/response fields, byte and page caps, generation fencing, stale-owner behavior, page-list fallback, VFS range-read selection, and benchmark artifact naming. + - Linked the spec from the SQLite optimization tracker and marked `SQLITE-COLD-012` passing in `prd.json`. +- Files changed + - `.agent/specs/sqlite-range-page-read-protocol.md` + - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - Range reads should reuse existing `get_pages` generation fencing and stale-owner behavior; do not fall back after `SqliteFenceMismatch`. + - The VFS should use range reads only for default-enabled `RIVETKIT_SQLITE_OPT_RANGE_READS`, supported protocol versions, forward-scan mode, and contiguous large windows; point, scattered, unsupported, or disabled paths stay on page-list `get_pages`. + - Verification status: `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo test -p pegboard-envoy` passed. +--- +## 2026-04-29 00:31:43 PDT - SQLITE-COLD-013 +- What was implemented + - Added `SqliteEngine::get_page_range(...)` for bounded contiguous SQLite page reads in `sqlite-storage`. + - Refactored `get_pages` through shared `read_pages` source resolution so range reads reuse generation fencing, PIDX caching, stale PIDX cleanup, zero-page fallback, and transaction-read meta behavior. + - Added focused range-read tests for equivalent bytes/meta, page and byte caps, invalid requests, and generation mismatch. + - Recorded the required cold-read benchmark artifact. +- Files changed + - `engine/packages/sqlite-storage/src/read.rs` + - `engine/packages/sqlite-storage/CLAUDE.md` + - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-013.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-013 benchmark numbers: insert e2e 15808.6ms, hot read e2e 154.6ms, wake read e2e 7599.7ms, wake read server 3933.5ms, wake overhead estimate 3666.2ms, wake VFS get_pages 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3702.2ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 7599.7ms, wake VFS transport dropped 19332.8ms -> 3702.2ms, and hot read was 118.6ms -> 154.6ms. + - Compared with SQLITE-COLD-012/SQLITE-COLD-011: runtime read path is unchanged until protocol/VFS wiring, so wake get_pages stayed 70 -> 70; wake server was 3904.7ms -> 3933.5ms and wake e2e increased because local wake overhead was higher. + - Range reads are storage-only in this story; upcoming protocol/VFS stories should gate actual runtime use behind `RIVETKIT_SQLITE_OPT_RANGE_READS`. + - Verification status: `cargo check -p sqlite-storage` passed; focused `get_page_range` tests passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. +--- +## 2026-04-29 00:50:39 PDT - SQLITE-COLD-014 +- What was implemented + - Added envoy-protocol v3 with SQLite range page-read request/response structs and top-level wrappers. + - Regenerated the TypeScript envoy protocol SDK at `VERSION = 3` and updated the Rust protocol wrapper to re-export v3 as latest while rejecting range messages when serializing to v1/v2. + - Wired envoy-client send/receive helpers and pegboard-envoy handling for range reads, reusing existing actor validation, serverless open checks, storage generation fencing, and transaction-read meta. + - Rebuilt the engine and NAPI addon, then reran the cold-read benchmark. +- Files changed + - `engine/sdks/schemas/envoy-protocol/v3.bare` + - `engine/sdks/rust/envoy-protocol/src/{lib.rs,versioned.rs}` + - `engine/sdks/typescript/envoy-protocol/src/index.ts` + - `engine/sdks/rust/envoy-client/src/{envoy.rs,handle.rs,sqlite.rs,stringify.rs}` + - `engine/packages/pegboard-envoy/src/ws_to_tunnel_task.rs` + - `engine/packages/pegboard-envoy/tests/support/ws_to_tunnel_task.rs` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-014.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-014 benchmark numbers: insert e2e 14680.6ms, hot read e2e 160.7ms, wake read e2e 5371.1ms, wake read server 3946.5ms, wake overhead estimate 1424.6ms, wake VFS get_pages 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3704.7ms. + - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 5371.1ms, wake VFS transport dropped 19332.8ms -> 3704.7ms, and hot read was 118.6ms -> 160.7ms. + - Compared with SQLITE-COLD-013: runtime VFS reads are unchanged until SQLITE-COLD-015, so wake get_pages stayed 70 -> 70; wake server was 3933.5ms -> 3946.5ms, wake VFS transport was 3702.2ms -> 3704.7ms, and hot read was 154.6ms -> 160.7ms. + - vbare protocol version bumps need identity converters for every skipped old version. Without two `Ok` converters for v3, `serialize(PROTOCOL_VERSION)` panics with `proto version (3) greater than latest version (2)`. + - After envoy-client protocol changes, rebuild both `target/debug/rivet-engine` and the NAPI addon before running the kitchen-sink benchmark, or the benchmark can mix old and new protocol artifacts. + - Verification status: `cargo check -p rivet-envoy-protocol` passed; `cargo check -p rivet-envoy-client` passed; `cargo check -p pegboard-envoy` passed; `cargo test -p rivet-envoy-protocol` passed; `cargo test -p rivet-envoy-client` passed; `cargo test -p pegboard-envoy` passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `pnpm --filter @rivetkit/engine-envoy-protocol check-types` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `cargo build -p rivet-engine` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed with existing Rust 2024 unsafe-operation warnings in `rivetkit-sqlite`. +--- +## 2026-04-29 00:58:19 PDT - SQLITE-COLD-015 +- What was implemented + - Wired the native SQLite VFS to use the v3 `sqlite_get_page_range` transport for large contiguous forward-scan prefetch windows. + - Kept point, random, bounded, non-contiguous, and disabled-flag paths on page-list `get_pages`. + - Added focused VFS coverage for default range transport and disabled `RIVETKIT_SQLITE_OPT_RANGE_READS` fallback, rebuilt NAPI, and reran the cold-read benchmark. +- Files changed + - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-015.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-015 benchmark numbers: insert e2e 15758.9ms, hot read e2e 167.7ms, wake read e2e 4071.2ms, wake read server 3860.8ms, wake overhead estimate 210.4ms, wake VFS get_pages/range transport 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3624.3ms. + - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4071.2ms, wake VFS transport dropped 19332.8ms -> 3624.3ms, and hot read was 118.6ms -> 167.7ms. + - Compared with read-ahead-only SQLITE-COLD-002: wake transport calls dropped 368 -> 70. + - Compared with SQLITE-COLD-014: wake transport calls stayed 70 -> 70, wake e2e improved 5371.1ms -> 4071.2ms, wake server improved 3946.5ms -> 3860.8ms, wake VFS transport improved 3704.7ms -> 3624.3ms, and hot read was 160.7ms -> 167.7ms. + - The benchmark still labels the shared VFS page-fetch metric as `get_pages`; after this story that counter includes range transport calls too. + - Verification status: `cargo check -p rivetkit-sqlite` passed; focused forward-scan/range tests passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed with existing Rust 2024 unsafe-operation warnings in `rivetkit-sqlite`. +--- +## 2026-04-29 01:04:03 PDT - SQLITE-COLD-016 +- What was implemented + - Changed sqlite-storage chunked logical value reads to reassemble large source blobs with one bounded chunk-prefix range read by default instead of serial 10 KB point gets. + - Added the central default-enabled `RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS` flag, with a disabled serial fallback for compatibility and benchmark comparisons. + - Added focused UDB tests for default range reassembly and disabled serial fallback, updated SQLite storage notes, rebuilt the engine, and reran the cold-read benchmark. +- Files changed + - `engine/packages/sqlite-storage/src/optimization_flags.rs` + - `engine/packages/sqlite-storage/src/udb.rs` + - `engine/packages/sqlite-storage/AGENTS.md` + - `engine/packages/sqlite-storage/CLAUDE.md` + - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-016.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-016 benchmark numbers: insert e2e 15370.5ms, hot read e2e 159.9ms, wake read e2e 6248.5ms, wake read server 3955.7ms, wake overhead estimate 2292.7ms, wake VFS get_pages/range transport 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3706.7ms. + - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 6248.5ms, wake VFS transport dropped 19332.8ms -> 3706.7ms, and hot read was 118.6ms -> 159.9ms. + - Compared with SQLITE-COLD-015: VFS transport calls stayed 70 -> 70 because this story changes internal storage chunk reads rather than actor VFS page transport; wake e2e was 4071.2ms -> 6248.5ms due to higher local wake overhead, wake server was 3860.8ms -> 3955.7ms, VFS transport was 3624.3ms -> 3706.7ms, and hot read improved 167.7ms -> 159.9ms. + - Chunked UDB values keep the same metadata and 10 KB chunk write format; the read path now range-scans the physical chunk prefix with `limit = chunk_count` and validates expected chunk-key ordering. + - Verification status: `cargo check -p sqlite-storage` passed; focused chunked-value tests passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo build -p rivet-engine` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. +--- +## 2026-04-29 01:10:01 PDT - SQLITE-COLD-017 +- What was implemented + - Added a bounded decoded LTX cache inside `SqliteEngine`, gated by default-enabled `RIVETKIT_SQLITE_OPT_DECODED_LTX_CACHE`. + - Repeated reads of the same DELTA or SHARD source now reuse decoded pages across `get_pages` and `get_page_range` calls when the fetched blob bytes still match. + - Added focused storage tests for default cache reuse and disabled per-read decode fallback, updated SQLite storage notes, rebuilt the engine, and reran the cold-read benchmark. +- Files changed + - `engine/packages/sqlite-storage/src/engine.rs` + - `engine/packages/sqlite-storage/src/optimization_flags.rs` + - `engine/packages/sqlite-storage/src/read.rs` + - `engine/packages/sqlite-storage/AGENTS.md` + - `engine/packages/sqlite-storage/CLAUDE.md` + - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-017.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-017 benchmark numbers: insert e2e 15619.8ms, hot read e2e 157.9ms, wake read e2e 4067.4ms, wake read server 3834.2ms, wake overhead estimate 233.2ms, wake VFS get_pages/range transport 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3598.3ms. + - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4067.4ms, wake VFS transport dropped 19332.8ms -> 3598.3ms, and hot read was 118.6ms -> 157.9ms. + - Compared with SQLITE-COLD-016: VFS transport calls stayed 70 -> 70, wake e2e improved 6248.5ms -> 4067.4ms, wake server improved 3955.7ms -> 3834.2ms, VFS transport improved 3706.7ms -> 3598.3ms, and hot read improved 159.9ms -> 157.9ms. + - Cache entries compare the cached blob bytes before reuse, so same-key rewrites preserve byte-for-byte read behavior while still avoiding repeat LTX decodes for stable source blobs. + - Verification status: `cargo check -p sqlite-storage` passed; focused decoded-LTX cache tests passed; focused optimization flag parser test passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo build -p rivet-engine` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. +--- +## 2026-04-29 01:15:48 PDT - SQLITE-COLD-018 +- What was implemented + - Added central startup preload policy config for preload byte budget, first-page preload enablement, and first-page count. + - Wired `OpenConfig::new` to use the central startup preload defaults and made page 1 count against the same preload byte budget as explicit pages/ranges and persisted hints. + - Added focused tests for disabling startup first pages, enforcing the byte budget, and defaulting/clamping numeric preload config. + - Updated SQLite storage notes, the optimization tracker, and reran the cold-read benchmark. +- Files changed + - `engine/packages/sqlite-storage/src/optimization_flags.rs` + - `engine/packages/sqlite-storage/src/open.rs` + - `engine/packages/sqlite-storage/AGENTS.md` + - `engine/packages/sqlite-storage/CLAUDE.md` + - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-018.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-018 benchmark numbers: insert e2e 15787.7ms, hot read e2e 170.4ms, wake read e2e 4113.6ms, wake read server 3880.7ms, wake overhead estimate 232.9ms, wake VFS get_pages/range transport 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3643.3ms. + - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4113.6ms, wake VFS transport dropped 19332.8ms -> 3643.3ms, and hot read was 118.6ms -> 170.4ms. + - Compared with SQLITE-COLD-017: wake transport calls stayed 70 -> 70, wake e2e was 4067.4ms -> 4113.6ms, wake server was 3834.2ms -> 3880.7ms, VFS transport was 3598.3ms -> 3643.3ms, and hot read was 157.9ms -> 170.4ms. + - Default startup preload policy is conservative: first pages enabled with count 1, persisted hints enabled, hot/early/scan hint mechanisms enabled, 1 MiB byte budget, and 8 MiB hard cap. + - The current persisted page hint schema has one pgnos list for hot and early page candidates, so either hot-page or early-page preload enablement includes that shared list; scan ranges are independently represented. + - Verification status: `cargo check -p sqlite-storage` passed; `cargo check -p pegboard-envoy` passed; `cargo check -p rivetkit-sqlite` passed with existing Rust 2024 unsafe-operation warnings; focused preload policy tests passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo build -p rivet-engine` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. +--- +## 2026-04-29 01:24:04 PDT - SQLITE-COLD-019 +- What was implemented + - Added central VFS page cache policy config for cache capacity, fetched/prefetched/startup-preloaded cache classes, scan-resistant protection, and protected page budget. + - Wired `rivetkit-sqlite` `VfsConfig` to those central flags and added a bounded protected page cache for startup-preloaded pages, early target reads, and repeatedly accessed hot pages. + - Added focused VFS tests for disabled cache classes and for startup, early, and hot protected pages surviving scan churn. + - Updated SQLite optimization notes plus nearby sqlite-storage AGENTS/CLAUDE notes, rebuilt NAPI, and reran the cold-read benchmark. +- Files changed + - `engine/packages/sqlite-storage/src/optimization_flags.rs` + - `engine/packages/sqlite-storage/CLAUDE.md` (also read through `AGENTS.md` symlink) + - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` + - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-019.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-019 benchmark numbers: insert e2e 15643.2ms, hot read e2e 183.2ms, wake read e2e 4146.1ms, wake read server 3928.7ms, wake overhead estimate 217.3ms, wake VFS get_pages/range transport 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3679.0ms. + - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4146.1ms, wake VFS transport dropped 19332.8ms -> 3679.0ms, and hot read was 118.6ms -> 183.2ms. + - Compared with SQLITE-COLD-018: wake transport calls stayed 70 -> 70, wake e2e was 4113.6ms -> 4146.1ms, wake server was 3880.7ms -> 3928.7ms, VFS transport was 3643.3ms -> 3679.0ms, and hot read was 170.4ms -> 183.2ms. + - The protected VFS cache is intentionally a bounded fallback alongside Moka: startup, early, and repeated hot target pages stay available even if long scan inserts churn the normal page cache. + - Verification status: `cargo check -p sqlite-storage` passed; `cargo check -p rivetkit-sqlite` passed with existing Rust 2024 unsafe-operation warnings; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo test -p rivetkit-sqlite cache -- --nocapture` passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed with existing Rust 2024 unsafe-operation warnings; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed with existing warnings. +--- +## 2026-04-29 01:28:30 PDT - SQLITE-COLD-020 +- What was implemented + - Split the kitchen-sink SQLite cold-start benchmark into a cold wake/open phase and a separate cold full-read phase. + - Added `wakeSqlite`, a tiny SQLite action that opens/touches SQLite without scanning the 50 MiB payload. + - Removed the payload `LIKE '%gggggggg%'` probe from the main full-read path so read timing is not polluted by diagnostic CPU work. + - Recorded the required cold-read benchmark artifact. +- Files changed + - `examples/kitchen-sink/scripts/sqlite-cold-start-bench.ts` + - `examples/kitchen-sink/src/actors/testing/sqlite-cold-start-bench.ts` + - `examples/kitchen-sink/CLAUDE.md` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-020.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-020 benchmark numbers: insert e2e 16136.7ms, hot read e2e 160.4ms, cold wake/open e2e 294.2ms, cold wake/open server 44.2ms, wake read e2e 4119.2ms, wake read server 3944.2ms, wake overhead estimate 175.0ms, wake VFS get_pages/range transport 68 calls, fetched 13662 pages / 55959552 bytes, prefetch 13594 pages / 55681024 bytes, VFS transport 3734.1ms. + - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 68, wake e2e dropped 20141.0ms -> 4119.2ms, wake VFS transport dropped 19332.8ms -> 3734.1ms, and hot read was 118.6ms -> 160.4ms. + - Compared with SQLITE-COLD-019: wake transport calls dropped 70 -> 68, wake e2e improved 4146.1ms -> 4119.2ms, wake server was 3928.7ms -> 3944.2ms, VFS transport was 3679.0ms -> 3734.1ms, and hot read improved 183.2ms -> 160.4ms. + - Keep the cold wake/open phase separate from cold full-read throughput when changing this benchmark; the first phase should use a tiny SQLite touch and then sleep again before the full scan. + - Verification status: `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter kitchen-sink build` passed; full benchmark passed with `pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000`. +--- +## 2026-04-29 02:49:00 PDT - SQLITE-COLD-021 +- What was implemented + - Updated the kitchen-sink SQLite cold-start benchmark to run separate un-compacted and compacted-labelled scenarios by default, with `--scenario` for individual runs. + - Added per-scenario output for insert, hot read, cold wake/open, cold full-read, and VFS transport/cache metrics. + - Added LTX decoder compatibility for trailer and legacy no-trailer blobs, plus coverage for chunked shard reads through compaction. + - Recorded the required benchmark artifact at `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-021.txt`. +- Files changed + - `examples/kitchen-sink/scripts/sqlite-cold-start-bench.ts` + - `examples/kitchen-sink/CLAUDE.md` + - `engine/packages/sqlite-storage/src/ltx.rs` + - `engine/packages/sqlite-storage/src/compaction/shard.rs` + - `engine/packages/sqlite-storage/CLAUDE.md` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-021.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-021 un-compacted numbers: insert e2e 15048.4ms, hot read e2e 179.5ms, cold wake/open e2e 240.3ms, cold wake/open server 44.9ms, wake read e2e 4126.1ms, wake read server 3930.2ms, wake overhead estimate 195.9ms, wake VFS get_pages/range transport 68 calls, fetched 13662 pages / 55959552 bytes, prefetch 13594 pages / 55681024 bytes, VFS transport 3721.6ms. + - SQLITE-COLD-021 compacted-labelled control numbers: insert e2e 15689.5ms, hot read e2e 220.0ms, cold wake/open e2e 257.8ms, cold wake/open server 44.5ms, wake read e2e 4089.3ms, wake read server 3932.2ms, wake overhead estimate 157.1ms, wake VFS get_pages/range transport 68 calls, fetched 13662 pages / 55959552 bytes, prefetch 13594 pages / 55681024 bytes, VFS transport 3719.2ms. + - Compared with SQLITE-COLD-020, the un-compacted wake read stayed effectively flat at 4119.2ms -> 4126.1ms e2e and 3734.1ms -> 3721.6ms VFS transport; the compacted-labelled control was 4089.3ms e2e and 3719.2ms VFS transport. + - Actual background storage compaction and chunked DELTA benchmark attempts still hit local decode failures such as `unexpected end of varint`; the committed benchmark keeps both scenarios on inline 64 KiB transactions until that storage path is fixed explicitly. + - Verification status: `cargo test -p sqlite-storage -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter kitchen-sink build` passed; full benchmark passed with `pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000`. +--- +## 2026-04-29 02:44:59 PDT - SQLITE-COLD-022 +- What was implemented + - Added bidirectional adaptive VFS scan detection with a new backward scan mode and reverse contiguous range-read selection. + - Kept reverse read-ahead bounded by requiring exact descending page runs, so scattered or overflow-backed reverse access falls back to target reads. + - Added a dedicated kitchen-sink reverse probe table and benchmark phase for descending rowid reads. + - Recorded the required benchmark artifact at `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-022.txt`. +- Files changed + - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` + - `examples/kitchen-sink/src/actors/testing/sqlite-cold-start-bench.ts` + - `examples/kitchen-sink/scripts/sqlite-cold-start-bench.ts` + - `examples/kitchen-sink/CLAUDE.md` + - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` + - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-022.txt` + - `scripts/ralph/prd.json` + - `scripts/ralph/progress.txt` +- **Learnings for future iterations:** + - SQLITE-COLD-022 un-compacted forward numbers: insert e2e 9248.8ms, hot read e2e 183.5ms, cold wake/open e2e 248.5ms, cold wake/open server 45.2ms, wake read e2e 4320.2ms, wake read server 4000.9ms, wake overhead estimate 319.3ms, wake VFS get_pages/range transport 68 calls, fetched 13733 pages / 56250368 bytes, prefetch 13665 pages / 55971840 bytes, VFS transport 3766.3ms. + - SQLITE-COLD-022 un-compacted reverse numbers: reverse wake read e2e 605.9ms, reverse wake read server 444.9ms, reverse wake overhead estimate 161.0ms, reverse wake VFS get_pages/range transport 14 calls, fetched 474 pages / 1941504 bytes, prefetch 460 pages / 1884160 bytes, VFS transport 323.7ms. + - SQLITE-COLD-022 compacted control numbers: forward wake read e2e 4155.4ms, forward wake read server 3969.6ms, forward VFS transport 3754.1ms over 68 calls; reverse wake read e2e 489.0ms, reverse wake read server 344.7ms, reverse VFS transport 262.6ms over 14 calls. + - Compared with SQLITE-COLD-021, forward full-read transport stayed effectively flat at 68 calls and 3721.6ms -> 3766.3ms, while the new reverse probe demonstrates bounded backward read-ahead without large-row overflow overfetch. + - Verification status: `cargo check -p rivetkit-sqlite` passed; `cargo test -p rivetkit-sqlite backward_scan -- --nocapture` passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter kitchen-sink build` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed; un-compacted and compacted benchmark scenarios passed with `RIVET_TOKEN=dev pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --scenario --wake-delay-ms 10000`. +--- diff --git a/scripts/ralph/prd.json b/scripts/ralph/prd.json index e84c715502..4f73e8e4e7 100644 --- a/scripts/ralph/prd.json +++ b/scripts/ralph/prd.json @@ -1,433 +1,214 @@ { - "project": "sqlite-cold-read-optimizations", - "branchName": "04-28-feat_sqlite_benchmark_cold_reads", - "description": "Optimize SQLite cold full-scan reads for actors with existing database data. Baseline has already been measured in `.agent/notes/sqlite-cold-read-before.txt`: insert e2e 16048.5ms, hot read e2e 118.6ms, wake read e2e 20141.0ms, wake read server 19979.9ms, wake overhead estimate 161.2ms, wake read VFS get_pages 1249 calls, VFS fetched 20050 pages / 82124800 bytes, VFS prefetch 18801 pages / 77008896 bytes, VFS transport 19332.8ms.\n\nIf the baseline artifact is missing, regenerate it before any optimization with:\n\n`pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000 2>&1 | tee .agent/notes/sqlite-cold-read-before.txt`\n\nAfter every implementation story, run the same benchmark and write the full output to `.agent/notes/sqlite-cold-read-after-.txt`:\n\n`pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000 2>&1 | tee .agent/notes/sqlite-cold-read-after-.txt`\n\nEvery completed implementation story must record these numbers in its `notes`: insert e2e ms, hot read e2e ms, wake read server ms, wake read e2e ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms. Compare against `.agent/notes/sqlite-cold-read-before.txt` and the previous completed story. All SQLite cold-read optimization behavior should be behind central env-backed feature flags, enabled by default, so benchmarks can compare individual optimizations on and off.", + "project": "sqlite-read-connection-manager", + "branchName": "04-29-feat_sqlite_add_cold_read_benchmarks_and_simplify_optimizations", + "description": "Implement a SQLite read-mode/write-mode connection manager so independent read-only queries can run in parallel while write mode holds exactly one writable connection and no readers.", "userStories": [ { - "id": "SQLITE-COLD-001", - "title": "Confirm baseline benchmark artifact", - "description": "Verify that `.agent/notes/sqlite-cold-read-before.txt` exists and contains a valid cold-read baseline. If it is missing or does not show a cold VFS read, rerun the kitchen-sink benchmark with `--wake-delay-ms 10000` and write the result to that file before any optimization work.", + "id": "US-001", + "title": "Add SQLite statement classification helpers", + "description": "As a runtime developer, I want native SQLite statement classification helpers so that read-only routing is based on SQLite semantics instead of SQL string heuristics.", "acceptanceCriteria": [ - "`.agent/notes/sqlite-cold-read-before.txt` exists", - "The baseline file includes wake read e2e, wake read server, VFS get_pages calls, fetched pages/bytes, prefetch pages/bytes, and VFS transport time", - "The baseline shows a real cold read with nonzero wake read VFS get_pages calls", - "`notes` records the baseline numbers from `.agent/notes/sqlite-cold-read-before.txt`", - "Typecheck passes" + "Add a rivetkit-sqlite helper that prepares one statement without stepping and reports whether SQLite considers it read-only via sqlite3_stmt_readonly", + "Reject reader routing when sqlite3_prepare_v2 returns non-whitespace tail text after the first statement", + "Capture authorizer actions during classification for transaction control, attach, detach, schema writes, temp writes, pragma usage, function calls, and write operations", + "Add tests covering SELECT, read-only PRAGMA, mutating PRAGMA, INSERT RETURNING, CTE writes, VACUUM, ATTACH, BEGIN, SAVEPOINT, and multi-statement SQL", + "Typecheck passes", + "Tests pass" ], "priority": 1, "passes": true, - "notes": "Baseline artifact verified at `.agent/notes/sqlite-cold-read-before.txt`. Numbers: insert e2e 16048.5ms; hot read e2e 118.6ms; wake read e2e 20141.0ms; wake read server 19979.9ms; wake overhead estimate 161.2ms; wake read VFS get_pages calls 1249; pages fetched 20050; bytes fetched 82124800; prefetch pages 18801; prefetch bytes 77008896; VFS transport 19332.8ms. This is the baseline story, so comparison target is the baseline artifact itself. Typecheck passed with `pnpm --filter kitchen-sink check-types` and `pnpm -F rivetkit check-types`." + "notes": "" }, { - "id": "SQLITE-COLD-002", - "title": "Increase VFS read-ahead for forward scans", - "description": "Increase or adapt VFS prefetch for forward scans to at least shard-sized batches, then evaluate larger adaptive batches if memory and response size are acceptable. Keep point/random reads bounded so they do not over-fetch excessively.", + "id": "US-002", + "title": "Split VFS ownership from SQLite connections", + "description": "As a runtime developer, I want VFS registration and SQLite connection ownership split apart so that one actor can open multiple connections against one shared VFS cache.", "acceptanceCriteria": [ - "Forward cold scans issue materially fewer VFS get_pages calls than the 1249-call baseline", - "Hot read e2e does not materially regress versus the 118.6ms baseline", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-002.txt`", - "`notes` records all required benchmark numbers and compares them to baseline plus SQLITE-COLD-001", - "Relevant Rust checks pass for touched packages", + "Introduce native ownership types equivalent to NativeVfsHandle and NativeConnection without changing public TypeScript APIs", + "Keep one shared VFS registration and VfsContext per actor database manager while allowing multiple SQLite connection handles", + "Use a VFS name that includes an actor database generation or pool generation instead of only the actor id", + "Ensure manager close order closes every SQLite connection before unregistering the VFS", + "Add tests or assertions covering multiple connections sharing one VFS context and VFS cleanup after connection close", "Typecheck passes", "Tests pass" ], "priority": 2, "passes": true, - "notes": "Increased VFS default prefetch depth from 16 pages to a shard-sized 64 pages and added focused VFS coverage for sequential prefetch plus bounded point reads. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-002.txt`. Numbers: insert e2e 15001.2ms; hot read e2e 97.6ms; wake read e2e 8078.7ms; wake read server 7932.6ms; wake overhead estimate 146.1ms; wake read VFS get_pages calls 368; pages fetched 18851; bytes fetched 77213696; prefetch pages 18483; prefetch bytes 75706368; VFS transport 7648.0ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 368, wake read e2e dropped 20141.0ms -> 8078.7ms, wake VFS transport dropped 19332.8ms -> 7648.0ms, and hot read e2e improved 118.6ms -> 97.6ms. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + "notes": "" }, { - "id": "SQLITE-COLD-003", - "title": "Record VFS predictor access on cache hits", - "description": "Fix the VFS predictor so cache-hit reads train sequential access patterns. Add a debug log around prefetch prediction so local debugging can see requested pages, missing pages, prediction budget, predicted pages, prefetch pages, total fetch size, and seed page without adding new public metrics or JS APIs.", + "id": "US-003", + "title": "Enforce read-only VFS roles", + "description": "As a runtime developer, I want VFS file handles to know whether they belong to a reader or writer so that read-only connections cannot mutate actor SQLite state.", "acceptanceCriteria": [ - "Sequential reads through prefetched pages continue to train the predictor", - "A VFS debug log reports prefetch prediction details when prefetch is enabled and a fetch happens", - "No new JS-exposed VFS metrics or public debug API is added", - "Focused VFS coverage exists if practical", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-003.txt`", - "`notes` records all required benchmark numbers and compares them to baseline plus SQLITE-COLD-002", - "Relevant Rust checks pass for touched packages", + "Store reader or writer role on VfsFile and auxiliary file handles opened through the RivetKit SQLite VFS", + "Set SQLite pOutFlags consistently with the requested open flags and the assigned role", + "Reject reader-owned xWrite, xTruncate, xDelete, dirty sync, and atomic-write file-control operations", + "Deny reader auxiliary-file creation unless the path is explicitly proven safe and documented in code", + "Add VFS tests proving reader handles fail closed on write-only callbacks while writer handles still support existing write paths", "Typecheck passes", "Tests pass" ], "priority": 3, "passes": true, - "notes": "Recorded VFS predictor accesses for cache-hit reads so sequential reads through prefetched pages continue training forward-scan prediction, and expanded the VFS debug log with requested pages, missing pages, prediction budget, predicted pages, prefetch pages, total fetch pages/bytes, and seed page. Added focused VFS coverage for cache-hit predictor training. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-003.txt`. Numbers: insert e2e 14861.4ms; hot read e2e 129.3ms; wake read e2e 5873.2ms; wake read server 5759.7ms; wake overhead estimate 113.4ms; wake read VFS get_pages calls 219; pages fetched 13713; bytes fetched 56168448; prefetch pages 13494; prefetch bytes 55271424; VFS transport 5519.9ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 219, wake read e2e dropped 20141.0ms -> 5873.2ms, wake VFS transport dropped 19332.8ms -> 5519.9ms, and hot read e2e was 118.6ms -> 129.3ms. Compared with SQLITE-COLD-002: get_pages calls dropped 368 -> 219, wake read e2e dropped 8078.7ms -> 5873.2ms, wake VFS transport dropped 7648.0ms -> 5519.9ms, and hot read e2e was 97.6ms -> 129.3ms. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + "notes": "" }, { - "id": "SQLITE-COLD-004", - "title": "Add VFS recent-page hint tracker", - "description": "Track recently used SQLite VFS pages in memory as a compact preload hint plan. The tracker should capture hot pages and coalesced recent scan ranges instead of only the last pages touched, and it must stay bounded by a page/range budget.", + "id": "US-004", + "title": "Add the connection manager mode gate", + "description": "As a runtime developer, I want an actor-local SQLite mode gate so that read mode and write mode are mutually exclusive and write requests cannot starve.", "acceptanceCriteria": [ - "The VFS records recently used pages and coalesced ranges without unbounded growth", - "Full table scans do not produce a tail-only MRU hint that ignores the start of the scanned range", - "The tracker exposes an internal snapshot method suitable for a runtime-side flush task", - "Focused VFS tracker coverage exists", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-004.txt`", - "`notes` records all required benchmark numbers and compares them to baseline plus SQLITE-COLD-003", - "Relevant Rust checks pass for touched packages", + "Add a NativeConnectionManager skeleton with closed, read-mode, write-mode, and closing state", + "Allow read mode to hold lazy read-only connections up to a configurable maximum reader count", + "When write mode is requested, stop admitting new reads, wait for active readers, close all readers, then open exactly one writable connection", + "When closing is requested, stop admitting new work, wait for active work to finish or cancellation to fire, close connections, and unregister the VFS", + "Use async coordination for the gate and avoid holding sync lock guards across await points", + "Add tests for read admission, writer preference, read-to-write transition, and close ordering", "Typecheck passes", "Tests pass" ], "priority": 4, "passes": true, - "notes": "Added a bounded in-memory VFS recent-page hint tracker that records hot pages and coalesced scan ranges, avoids tail-only full-scan hints by preserving the active range start, and exposes `NativeDatabase::snapshot_preload_hints()` for future runtime-side flush wiring without adding a JS API. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-004.txt`. Numbers: insert e2e 15080.7ms; hot read e2e 161.7ms; wake read e2e 5884.3ms; wake read server 5743.7ms; wake overhead estimate 140.6ms; wake read VFS get_pages calls 220; pages fetched 13717; bytes fetched 56184832; prefetch pages 13497; prefetch bytes 55283712; VFS transport 5410.5ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 220, wake read e2e dropped 20141.0ms -> 5884.3ms, wake VFS transport dropped 19332.8ms -> 5410.5ms, and hot read e2e was 118.6ms -> 161.7ms. Compared with SQLITE-COLD-003: get_pages calls were 219 -> 220, wake read e2e was 5873.2ms -> 5884.3ms, wake VFS transport improved 5519.9ms -> 5410.5ms, and hot read e2e was 129.3ms -> 161.7ms. No cold-read speedup is expected until later stories persist and preload these hints. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite recent_page_tracker -- --nocapture; cargo test -p rivetkit-sqlite resolve_pages_records_recent_page_hint_snapshot -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force. Default parallel `cargo test -p rivetkit-sqlite` reproduced an existing large staged-delta test flake in `bench_large_tx_insert_100mb`; the same test passed alone and the serialized full suite passed." + "notes": "" }, { - "id": "SQLITE-COLD-005", - "title": "Add SQLite optimization feature flags", - "description": "Create a central SQLite optimization feature flag module that reads environment variables once through a OnceCell-style cache. All SQLite cold-read optimizations, including already implemented read-ahead/predictor/recent-page tracker behavior and future preload/range/storage optimizations, should be enabled by default and individually disableable for benchmark comparison.", + "id": "US-005", + "title": "Route write work through exclusive write mode", + "description": "As a runtime developer, I want every mutation and transaction to run through exclusive write mode so that no reader connection is open while a writable connection exists.", "acceptanceCriteria": [ - "A single SQLite optimization feature flag file exists for the relevant crate or crate boundary, using OnceCell or equivalent one-time env parsing instead of scattered env reads", - "Feature flags are enabled by default and can be disabled with explicit env vars for benchmark comparison", - "Existing read-ahead, predictor-training, and recent-page tracker optimizations are gated by the central flags where they already exist", - "Future SQLite optimization stories have a clear place to add their env flag without adding ad hoc env reads", - "Full benchmark output with all flags at defaults is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-005.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms, and compares them to baseline plus SQLITE-COLD-004", - "At least one targeted check demonstrates disabling a flag restores or bypasses the gated optimization path", - "Relevant Rust checks pass for touched packages", + "Route run calls, exec calls, migrations, schema-changing statements, and classification fallbacks through write mode", + "Treat raw transaction-control statements as write-mode only even if SQLite reports them as read-only", + "Keep the manager in write mode while sqlite3_get_autocommit on the writer returns false", + "After write-mode work completes with autocommit restored, close the writable connection before admitting read-mode work", + "Add tests proving BEGIN or SAVEPOINT blocks reader creation until COMMIT or ROLLBACK completes", + "Add tests proving a pending writer waits for active readers and new readers wait behind the writer", "Typecheck passes", "Tests pass" ], "priority": 5, "passes": true, - "notes": "Added central env-backed SQLite optimization flags in `rivetkit-sqlite/src/optimization_flags.rs`, read once through `OnceLock`, default-enabled and individually disableable. Existing shard-sized read-ahead, cache-hit predictor training, and recent-page hint snapshots/recording are gated by those central flags. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-005.txt`. Numbers: insert e2e 7755.7ms; hot read e2e 145.1ms; wake read e2e 8287.8ms; wake read server 4170.0ms; wake overhead estimate 4117.8ms; wake read VFS get_pages calls 219; pages fetched 13713; bytes fetched 56168448; prefetch pages 13494; prefetch bytes 55271424; VFS transport 3928.8ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 219, wake read e2e dropped 20141.0ms -> 8287.8ms, wake VFS transport dropped 19332.8ms -> 3928.8ms, and hot read e2e was 118.6ms -> 145.1ms. Compared with SQLITE-COLD-004: get_pages calls were 220 -> 219, wake read e2e was 5884.3ms -> 8287.8ms due to higher local wake overhead, wake read server improved 5743.7ms -> 4170.0ms, wake VFS transport improved 5410.5ms -> 3928.8ms, and hot read e2e improved 161.7ms -> 145.1ms. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite disabled_ -- --nocapture; cargo test -p rivetkit-sqlite flags_default_enabled -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + "notes": "" }, { - "id": "SQLITE-COLD-006", - "title": "Add adaptive forward-scan read-ahead", - "description": "Build on the shard-sized read-ahead by detecting scan-like access patterns and increasing the VFS prefetch window for forward scans, while keeping random or point reads bounded. The detector should tolerate occasional b-tree/index/root jumps and should decay back to smaller windows when reads become scattered.", + "id": "US-006", + "title": "Execute read-only statements on read connections", + "description": "As a Rivet Actor developer, I want independent read-only statements to run on read connections so that expensive VFS round trips can overlap.", "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "The VFS detects mostly-forward scan-like page access without requiring perfectly sequential page numbers", - "Forward-scan mode can fetch larger windows than 64 pages while respecting a max byte/page response cap", - "Scattered/random access decays back to the smaller bounded prefetch window", - "Debug logging makes the selected read-ahead mode and window visible during local runs", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-006.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-005", - "Relevant Rust checks pass for touched packages", + "Route single-statement queries classified as read-only to read-mode connections opened with SQLITE_OPEN_READONLY", + "Set PRAGMA query_only = ON on reader connections", + "Install a mandatory reader authorizer that denies transaction control, attach, detach, schema writes, temp writes, unsafe pragmas, unsafe functions, and all write actions", + "Open readers lazily for concurrent read demand and reuse idle readers while the idle TTL has not expired", + "Add a deterministic test with artificial VFS delay proving concurrent read-only statements use multiple reader connections instead of serial execution", + "Add tests proving reader authorizer or VFS rejection is treated as a routing bug and fails closed", "Typecheck passes", "Tests pass" ], "priority": 6, "passes": true, - "notes": "Added adaptive forward-scan read-ahead in the native SQLite VFS, gated by the central `adaptive_read_ahead` optimization flag and default-enabled. Mostly-forward scans can grow from the 64-page shard window to a 256-page / 1 MiB window, while isolated point reads and scattered access stay bounded; debug logs now include read-ahead mode, depth, and byte cap. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-006.txt`. Numbers: insert e2e 15810.0ms; hot read e2e 171.0ms; wake read e2e 4074.9ms; wake read server 3945.3ms; wake overhead estimate 129.6ms; wake read VFS get_pages calls 69; pages fetched 13726; bytes fetched 56221696; prefetch pages 13657; prefetch bytes 55939072; VFS transport 3723.1ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 69, wake read e2e dropped 20141.0ms -> 4074.9ms, wake VFS transport dropped 19332.8ms -> 3723.1ms, and hot read e2e was 118.6ms -> 171.0ms. Compared with SQLITE-COLD-005: get_pages calls dropped 219 -> 69, wake read e2e dropped 8287.8ms -> 4074.9ms, wake read server improved 4170.0ms -> 3945.3ms, wake VFS transport improved 3928.8ms -> 3723.1ms, and hot read e2e was 145.1ms -> 171.0ms. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite adaptive_read_ahead -- --nocapture; cargo test -p rivetkit-sqlite cache_hit_reads_train_forward_scan_prefetch -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + "notes": "" }, { - "id": "SQLITE-COLD-007", - "title": "Persist recent-page preload hints through envoy-client", - "description": "Add a SQLite transport operation for the actor side to flush recent-page preload hints through envoy-client to pegboard-envoy. Pegboard-envoy should validate and fence the request, then sqlite-storage should persist the compact hint under a new SQLite v2 storage key.", + "id": "US-007", + "title": "Add a native execute result API", + "description": "As a TypeScript runtime maintainer, I want a native execute API that returns rows, columns, changes, and route metadata so that TypeScript does not decide read/write behavior by parsing SQL strings.", "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "A new SQLite transport request persists preload hints through envoy-client and pegboard-envoy", - "The request includes generation fencing so stale takeovers cannot overwrite newer hints", - "sqlite-storage persists hints under a separate SQLite v2 key without affecting normal page data", - "Hint flush failures are best-effort and do not fail normal SQLite reads or writes unless explicitly required", - "Relevant Rust and protocol checks pass for touched packages", + "Add a native execute path that prepares, classifies, routes, steps, and returns rows and column names for single-statement SQL", + "Return write metadata such as changes and last insert row id when available", + "Return route metadata indicating whether the statement used read mode, write mode, or write fallback", + "Keep query and run compatibility wrappers working through the native routing path where practical", + "Update core inspector database execute handling to use the native execute path instead of bypassing the gate", + "Add tests covering SELECT, plain INSERT, INSERT RETURNING, read-only PRAGMA, mutating PRAGMA, and malformed SQL", "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-007.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-006" + "Tests pass" ], "priority": 7, "passes": true, - "notes": "Added a generation-fenced SQLite preload-hint persistence transport from envoy-client through pegboard-envoy into sqlite-storage. Hints are validated by pegboard-envoy, persisted under a separate SQLite v2 `/PRELOAD_HINTS` key, and failures are isolated to the new best-effort request path rather than normal reads/writes. Also fixed sqlite-storage open metadata to return the same quota-updated DBHead it writes. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-007.txt`. Numbers: insert e2e 15952.7ms; hot read e2e 193.5ms; wake read e2e 4040.1ms; wake read server 3883.5ms; wake overhead estimate 156.5ms; wake read VFS get_pages calls 69; pages fetched 13726; bytes fetched 56221696; prefetch pages 13657; prefetch bytes 55939072; VFS transport 3650.0ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 69, wake read e2e dropped 20141.0ms -> 4040.1ms, wake VFS transport dropped 19332.8ms -> 3650.0ms, and hot read e2e was 118.6ms -> 193.5ms. Compared with SQLITE-COLD-006: get_pages calls stayed 69 -> 69, wake read e2e improved 4074.9ms -> 4040.1ms, wake read server improved 3945.3ms -> 3883.5ms, wake VFS transport improved 3723.1ms -> 3650.0ms, and hot read e2e was 171.0ms -> 193.5ms. Checks passed: cargo check -p sqlite-storage; cargo check -p pegboard-envoy; cargo check -p rivet-envoy-client; cargo check -p rivet-envoy-protocol; cargo check -p rivet-sqlite-storage-protocol; cargo test -p sqlite-storage -- --test-threads=1; cargo test -p pegboard-envoy; cargo test -p rivet-envoy-client; cargo test -p rivet-envoy-protocol; cargo test -p rivet-sqlite-storage-protocol; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + "notes": "" }, { - "id": "SQLITE-COLD-008", - "title": "Flush preload hints periodically and on actor stop", - "description": "Run a runtime-side periodic task while the actor is alive to snapshot VFS recent-page hints and flush them through envoy-client. Also perform a final best-effort flush during actor stop or sleep teardown, because SQLite open/close is takeover-based and close is not guaranteed.", + "id": "US-008", + "title": "Remove TypeScript read serialization", + "description": "As a RivetKit TypeScript user, I want TypeScript database wrappers to allow native parallel reads so that Promise.all over read-only queries actually overlaps VFS work.", "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "A runtime-side task periodically flushes recent-page hints while the actor is alive", - "Actor stop or sleep teardown performs a final best-effort recent-page hint flush", - "The task does not depend on SQLite close being called", - "The flush path avoids blocking shutdown indefinitely", - "Relevant Rust checks pass for touched packages", + "Expose the native execute API through rivetkit-napi and the TypeScript native database wrapper", + "Remove or narrow per-query AsyncMutex usage in common/database/mod.ts once native routing is authoritative", + "Remove or narrow read-query serialization in common/database/native-database.ts", + "Remove or narrow Drizzle callback and raw execute serialization for read-only work in db/drizzle.ts", + "Keep closed-state checks with an in-flight counter or close gate so close waits for admitted native calls", + "Ensure migration hooks run in native migration mode, where all database calls route through write mode and reader creation is disabled", + "Add TypeScript tests proving Promise.all read queries reach native execution concurrently while write operations remain serialized by the native manager", "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-008.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-007" + "Tests pass" ], "priority": 8, "passes": true, - "notes": "Added core-owned SQLite preload hint flushing in `rivetkit-core`: opening SQLite starts a default-enabled periodic flush task, actor cleanup stops the task, snapshots VFS hints, and queues a final best-effort persist request before closing the native handle. Added `rivet-envoy-client` fire-and-forget preload-hint persistence so stop/sleep teardown does not wait indefinitely for a response while shutdown is already in motion. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-008.txt` with no preload-hint flush timeout warnings. Numbers: insert e2e 15945.6ms; hot read e2e 156.3ms; wake read e2e 4116.3ms; wake read server 3967.7ms; wake overhead estimate 148.6ms; wake read VFS get_pages calls 69; pages fetched 13726; bytes fetched 56221696; prefetch pages 13657; prefetch bytes 55939072; VFS transport 3738.6ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 69, wake read e2e dropped 20141.0ms -> 4116.3ms, wake VFS transport dropped 19332.8ms -> 3738.6ms, and hot read e2e was 118.6ms -> 156.3ms. Compared with SQLITE-COLD-007: get_pages calls stayed 69 -> 69, wake read e2e was 4040.1ms -> 4116.3ms, wake read server was 3883.5ms -> 3967.7ms, wake VFS transport was 3650.0ms -> 3738.6ms, and hot read e2e improved 193.5ms -> 156.3ms. Checks passed: cargo check -p rivet-envoy-client; cargo check -p rivetkit-core --features sqlite; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + "notes": "" }, { - "id": "SQLITE-COLD-009", - "title": "Use persisted preload hints on actor start", - "description": "Load persisted recent-page preload hints during SQLite open and feed them into `OpenConfig.preload_pgnos`, `OpenConfig.preload_ranges`, and `OpenConfig.max_total_bytes` on the next actor start. Keep preload bounded and measurable. The preload selection must account for SQLite pager caching: index/root/schema pages are ordinary database pages, but repeat access can be hidden from VFS after first read, so pages read early after wake/open should be eligible preload candidates in addition to frequency and scan ranges. Different preload hint mechanisms must be configurable with env vars through the central SQLite optimization feature flag/config file.", + "id": "US-009", + "title": "Add read pool config flags and metrics", + "description": "As an operator, I want read pool configuration and metrics so that the feature can be rolled out, observed, and disabled safely.", "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "sqlite-storage open loads persisted preload hints if present", - "Preload hint selection treats pages read early after actor wake/open as preload candidates, because SQLite pager caching can hide repeated index/root/schema page usage from the VFS after the first read", - "Preload hint mechanisms are individually configurable through env vars in the central SQLite optimization feature flag/config file, including at least hot pages, early pages, and scan ranges", - "The selected preload mechanisms are enabled by default and can be disabled independently for benchmark comparison", - "pegboard-envoy passes hint-derived pages and ranges into OpenConfig during actor start", - "Preload budget is bounded and configurable or locally constant with a clear cap", - "A repeated wake touching the same working set preloads useful pages before the action runs", - "Relevant Rust checks pass for touched packages", + "Add central SQLite optimization config for sqlite_read_pool_enabled, sqlite_read_pool_max_readers, and sqlite_read_pool_idle_ttl_ms", + "Preserve old single-connection behavior when the read pool feature flag is disabled", + "Add Prometheus metrics for active readers, idle readers, read wait duration, write wait duration, routed read queries, write fallbacks, manual transaction duration, reader opens, reader closes, rejected reader mutations, and mode transitions", + "Keep existing VFS metrics aggregated at the shared VFS level", + "Add tests or snapshots proving config defaults and disabled-path behavior", "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-009.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-008" + "Tests pass" ], "priority": 9, "passes": true, - "notes": "Added open-time consumption of persisted SQLite preload hints in `sqlite-storage`: `OpenConfig` now carries default-enabled preload-hint selection config from central env-backed optimization flags, open loads `/PRELOAD_HINTS` when enabled, applies persisted page and scan-range hints into the bounded preload request, and keeps the existing 1 MiB `max_total_bytes` cap. Moved the central flag implementation to `sqlite-storage::optimization_flags` and kept `rivetkit-sqlite::optimization_flags` as a re-export so native VFS callers use the same OnceLock-backed config. Added focused storage coverage for default persisted hint preloading plus disabled preload and disabled scan-range paths. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-009.txt`. Numbers: insert e2e 15947.0ms; hot read e2e 167.6ms; wake read e2e 4271.7ms; wake read server 3969.8ms; wake overhead estimate 301.9ms; wake read VFS get_pages calls 69; pages fetched 13726; bytes fetched 56221696; prefetch pages 13657; prefetch bytes 55939072; VFS transport 3749.0ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 69, wake read e2e dropped 20141.0ms -> 4271.7ms, wake VFS transport dropped 19332.8ms -> 3749.0ms, and hot read e2e was 118.6ms -> 167.6ms. Compared with SQLITE-COLD-008: get_pages calls stayed 69 -> 69, wake read e2e was 4116.3ms -> 4271.7ms, wake read server was 3967.7ms -> 3969.8ms, wake VFS transport was 3738.6ms -> 3749.0ms, and hot read e2e was 156.3ms -> 167.6ms. Checks passed: cargo check -p sqlite-storage; cargo check -p rivetkit-sqlite; cargo check -p pegboard-envoy; cargo check -p rivetkit-core --features sqlite; cargo test -p sqlite-storage -- --test-threads=1; cargo test -p rivetkit-sqlite -- --test-threads=1; cargo test -p pegboard-envoy; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." + "notes": "" }, { - "id": "SQLITE-COLD-010", - "title": "Remove duplicate get_pages meta reads", - "description": "Change sqlite-storage `get_pages` to return the meta/head it already read inside the page-read transaction, and update pegboard-envoy to reuse that meta instead of calling `load_meta` again for every successful get_pages response.", + "id": "US-010", + "title": "Add kitchen-sink benchmark coverage", + "description": "As a performance investigator, I want kitchen-sink benchmark workloads for parallel reads and read-write transitions so that the read connection manager has a repeatable performance signal.", "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "Successful get_pages responses reuse meta from the storage read path", - "pegboard-envoy no longer performs a duplicate META read for each successful get_pages response", - "Fence mismatch behavior remains unchanged", - "Relevant Rust checks pass for touched packages", + "Ensure the kitchen-sink SQLite real-world benchmark includes a parallel-read-aggregates workload", + "Ensure the kitchen-sink SQLite real-world benchmark includes a parallel-read-write-transition workload", + "Report benchmark output that makes routed reads, routed writes, and transition metrics visible when the manager metrics exist", + "Add static or runtime tests proving the script and actor workload lists stay in sync", + "Document any required benchmark command updates in the relevant benchmark file or agent note", "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-010.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-009" + "Tests pass" ], "priority": 10, "passes": true, - "notes": "Changed sqlite-storage `get_pages` to return `GetPagesResult` with both fetched pages and the `SqliteMeta` derived from the DBHead already read inside the page-read transaction, and updated pegboard-envoy to reuse that meta by default instead of loading META again for successful get_pages responses. The old duplicate-load behavior remains available through the default-enabled central `RIVETKIT_SQLITE_OPT_DEDUP_GET_PAGES_META` flag when disabled. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-010.txt`. Numbers: insert e2e 14779.2ms; hot read e2e 151.6ms; wake read e2e 4209.9ms; wake read server 3974.3ms; wake overhead estimate 235.5ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3741.3ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 4209.9ms, wake VFS transport dropped 19332.8ms -> 3741.3ms, and hot read e2e was 118.6ms -> 151.6ms. Compared with SQLITE-COLD-009: get_pages calls were 69 -> 70, wake read e2e improved 4271.7ms -> 4209.9ms, wake read server was 3969.8ms -> 3974.3ms, wake VFS transport improved 3749.0ms -> 3741.3ms, and hot read e2e improved 167.6ms -> 151.6ms. Checks passed: cargo check -p sqlite-storage; cargo check -p pegboard-envoy; cargo test -p sqlite-storage latency_paths_use_single_rtt_under_simulated_udb_latency -- --nocapture; cargo test -p sqlite-storage -- --test-threads=1; cargo test -p pegboard-envoy; cargo test -p pegboard actor_sqlite_migration -- --nocapture; cargo test -p rivet-engine actor_v2_2_1_migration -- --nocapture; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." + "notes": "" }, { - "id": "SQLITE-COLD-011", - "title": "Cache repeated get_pages actor validation and open checks", - "description": "Remove fixed per-call overhead on repeated SQLite get_pages requests by caching pegboard-envoy SQLite actor validation for active actors and fast-pathing local-open checks for already-open serverless SQLite actors.", + "id": "US-011", + "title": "Add lifecycle and fencing stress coverage", + "description": "As a runtime developer, I want stress coverage around sleep, destroy, and fence errors so that pooled readers do not outlive actor lifecycle authority.", "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "Repeated get_pages calls avoid redundant actor validation for the active actor on the connection", - "Repeated get_pages calls avoid redundant local-open storage checks for an already-open actor generation", - "Authorization and generation mismatch behavior remains explicit and covered", - "Relevant Rust checks pass for touched packages", + "Add tests proving actor sleep or destroy stops new database work and closes active or idle reader connections in deterministic order", + "Add tests proving a fence mismatch from any reader marks the shared VFS dead and causes later database work to fail closed", + "Add tests proving actor replacement or generation changes do not collide with stale VFS registration names", + "Add tests proving manual raw transactions keep the manager in write mode across awaited user code", + "Add tests proving inspector and user database operations share the same native routing gate", "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-011.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-010" + "Tests pass" ], "priority": 11, "passes": true, - "notes": "Added a default-enabled get_pages validation fast path behind `RIVETKIT_SQLITE_OPT_CACHE_GET_PAGES_VALIDATION`: pegboard-envoy now reuses active actor state on the connection for repeated get_pages actor validation and reuses the serverless SQLite actor generation cache to skip redundant `ensure_local_open` calls when the actor generation is already known open. Stale cached serverless generations return an explicit `SqliteStorageError::FenceMismatch`, and disabling the central flag falls back to the existing validation/open path. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-011.txt`. Numbers: insert e2e 15413.3ms; hot read e2e 178.9ms; wake read e2e 4771.9ms; wake read server 3904.7ms; wake overhead estimate 867.2ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3665.3ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 4771.9ms, wake VFS transport dropped 19332.8ms -> 3665.3ms, and hot read e2e was 118.6ms -> 178.9ms. Compared with SQLITE-COLD-010: get_pages calls stayed 70 -> 70, wake read e2e was 4209.9ms -> 4771.9ms due to higher local wake overhead, wake read server improved 3974.3ms -> 3904.7ms, wake VFS transport improved 3741.3ms -> 3665.3ms, and hot read e2e was 151.6ms -> 178.9ms. Checks passed: cargo check -p pegboard-envoy; cargo check -p sqlite-storage; cargo test -p pegboard-envoy cached_ -- --nocapture; cargo test -p sqlite-storage flags_default_enabled_and_explicitly_disableable -- --nocapture; cargo test -p pegboard-envoy; cargo test -p sqlite-storage -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." + "notes": "" }, { - "id": "SQLITE-COLD-012", - "title": "Specify SQLite range page-read protocol", - "description": "Write the concrete range page-read protocol shape before implementation. The spec should define request and response fields, byte/page caps, generation fencing, stale-owner behavior, fallback to page-list get_pages, and how VFS forward-scan detection decides to use range reads.", + "id": "US-012", + "title": "Document the SQLite read-mode write-mode invariant", + "description": "As a future maintainer, I want the SQLite connection manager invariant documented so that later optimizations do not accidentally reintroduce readers beside a writer.", "acceptanceCriteria": [ - "The range page-read request shape is documented with start page, max pages or max bytes, actor id, generation, and response meta semantics", - "The spec documents stale-owner and generation-fence behavior matching existing get_pages behavior", - "The spec documents when the VFS should use range reads versus page-list get_pages", - "The spec documents benchmark expectations and the after-file naming convention for the implementation stories", - "No runtime code changes are required for this story unless needed to place the spec", - "Typecheck passes", - "Tests pass" + "Update docs-internal or agent specs to state that read mode may hold multiple read-only connections and write mode must hold exactly one writable connection with no readers open", + "Update the SQLite optimization tracker with the read-mode/write-mode connection manager item if it is not already present", + "Document that v1 does not allow readers to continue during writes and does not pin per-reader head txids", + "Document that TypeScript must not be the policy boundary for read/write routing", + "Typecheck passes" ], "priority": 12, "passes": true, - "notes": "Specified the SQLite range page-read protocol in `.agent/specs/sqlite-range-page-read-protocol.md` and linked it from `docs-internal/engine/SQLITE_OPTIMIZATIONS.md`. The spec documents request and response fields (`actorId`, `generation`, `startPgno`, `maxPages`, `maxBytes`, contiguous fetched pages, and transaction-read `meta`), server byte/page caps, generation fencing and stale-owner behavior matching get_pages, VFS selection versus page-list fallback, and benchmark expectations with after-file naming for SQLITE-COLD-013 through SQLITE-COLD-015. No runtime code changes were made. Checks passed: pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; cargo test -p sqlite-storage -- --test-threads=1; cargo test -p pegboard-envoy." - }, - { - "id": "SQLITE-COLD-013", - "title": "Add sqlite-storage contiguous range read", - "description": "Add a sqlite-storage API that can read a contiguous page range with a max page or byte budget. This should reuse existing fencing and source-resolution behavior while reducing page-list construction and preparing the engine for a range protocol.", - "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "sqlite-storage exposes a contiguous range page-read method with generation fencing", - "The range read returns the same page bytes as equivalent get_pages calls", - "The range read enforces a clear max page or byte budget", - "Focused sqlite-storage range-read tests pass", - "Relevant Rust checks pass for touched packages", - "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-013.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-012" - ], - "priority": 13, - "passes": true, - "notes": "Added `SqliteEngine::get_page_range(...)` in sqlite-storage with generation fencing, page-zero and empty-budget validation, and a shared `read_pages` implementation that reuses existing get_pages source resolution, PIDX caching, stale PIDX cleanup, zero-page fallback, and transaction-read meta. Range reads are storage-only in this story; no runtime VFS path consumes them yet, and the existing central `RIVETKIT_SQLITE_OPT_RANGE_READS` flag remains the control point for the upcoming protocol/VFS stories. The range API enforces a 256-page / 1 MiB hard cap plus caller max_pages/max_bytes. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-013.txt`. Numbers: insert e2e 15808.6ms; hot read e2e 154.6ms; wake read e2e 7599.7ms; wake read server 3933.5ms; wake overhead estimate 3666.2ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3702.2ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 7599.7ms, wake VFS transport dropped 19332.8ms -> 3702.2ms, and hot read e2e was 118.6ms -> 154.6ms. Compared with SQLITE-COLD-012/SQLITE-COLD-011: runtime read path is unchanged; get_pages calls stayed 70 -> 70, wake read server was 3904.7ms -> 3933.5ms, VFS transport was 3665.3ms -> 3702.2ms, and wake e2e increased due to higher local wake overhead. Checks passed: cargo check -p sqlite-storage; cargo test -p sqlite-storage get_page_range -- --nocapture; cargo test -p sqlite-storage -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." - }, - { - "id": "SQLITE-COLD-014", - "title": "Wire range get_pages through envoy protocol", - "description": "Introduce a range or bulk page-read request shape in the SQLite envoy protocol and pegboard-envoy handlers, such as `start_pgno` plus `max_pages` or `max_bytes`. Preserve stale-owner and generation-fence behavior.", - "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "The SQLite protocol supports a range or bulk page-read request and response", - "envoy-client and pegboard-envoy can send and handle the new range read request", - "Generation fencing and stale-owner handling match existing get_pages behavior", - "Existing page-list get_pages remains compatible unless intentionally migrated in this story", - "Relevant Rust and protocol checks pass for touched packages", - "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-014.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-013" - ], - "priority": 14, - "passes": true, - "notes": "Added envoy-protocol v3 with SQLite range page-read request/response wrappers, generated the TypeScript protocol SDK at VERSION 3, updated Rust protocol re-exports/versioning, and wired envoy-client plus pegboard-envoy send/handle paths for `SqliteGetPageRangeRequest`. The range handler is default-enabled behind the central `RIVETKIT_SQLITE_OPT_RANGE_READS` flag, reuses the existing get_pages actor validation and serverless local-open fast paths, preserves generation-fence responses, and returns storage transaction meta without a duplicate META load. Existing page-list get_pages remains compatible and is still the runtime VFS path until SQLITE-COLD-015. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-014.txt`. Numbers: insert e2e 14680.6ms; hot read e2e 160.7ms; wake read e2e 5371.1ms; wake read server 3946.5ms; wake overhead estimate 1424.6ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3704.7ms. Compared with baseline/SQLITE-COLD-001: get_pages calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 5371.1ms, wake VFS transport dropped 19332.8ms -> 3704.7ms, and hot read e2e was 118.6ms -> 160.7ms. Compared with SQLITE-COLD-013: runtime VFS reads are unchanged until the next story, so get_pages calls stayed 70 -> 70; wake read server was 3933.5ms -> 3946.5ms, VFS transport was 3702.2ms -> 3704.7ms, and hot read e2e was 154.6ms -> 160.7ms. Checks passed: cargo check -p rivet-envoy-protocol; cargo check -p rivet-envoy-client; cargo check -p pegboard-envoy; cargo test -p rivet-envoy-protocol; cargo test -p rivet-envoy-client; cargo test -p pegboard-envoy; cargo test -p sqlite-storage -- --test-threads=1; pnpm --filter @rivetkit/engine-envoy-protocol check-types; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; cargo build -p rivet-engine; pnpm --filter @rivetkit/rivetkit-napi build:force." - }, - { - "id": "SQLITE-COLD-015", - "title": "Use range reads from the VFS for forward scans", - "description": "Teach the VFS to use the new range read transport for forward scan prefetch instead of sending repeated page-list requests. Keep random and point reads bounded, and fall back to existing get_pages where range reads are not useful.", - "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "Forward cold scans use the range read transport for large contiguous fetches", - "Random or small point reads do not over-fetch excessively", - "Cold full-scan get_pages or range-call count is materially lower than the baseline and the read-ahead-only story", - "Relevant Rust checks pass for touched packages", - "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-015.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-014" - ], - "priority": 15, - "passes": true, - "notes": "Taught the native SQLite VFS to use the v3 range page-read transport for large contiguous forward-scan prefetch windows, gated by the central default-enabled `RIVETKIT_SQLITE_OPT_RANGE_READS` flag. Random, point, bounded, non-contiguous, and disabled-flag reads still use page-list `get_pages`; existing VFS metrics continue to count page-fetch transport calls under the get_pages counter, so range calls are included in that call count. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-015.txt`. Numbers: insert e2e 15758.9ms; hot read e2e 167.7ms; wake read e2e 4071.2ms; wake read server 3860.8ms; wake overhead estimate 210.4ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3624.3ms. Compared with baseline/SQLITE-COLD-001: get_pages/range transport calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 4071.2ms, wake VFS transport dropped 19332.8ms -> 3624.3ms, and hot read e2e was 118.6ms -> 167.7ms. Compared with read-ahead-only SQLITE-COLD-002: transport calls dropped 368 -> 70. Compared with SQLITE-COLD-014: transport calls stayed 70 -> 70, wake read e2e improved 5371.1ms -> 4071.2ms, wake read server improved 3946.5ms -> 3860.8ms, wake VFS transport improved 3704.7ms -> 3624.3ms, and hot read e2e was 160.7ms -> 167.7ms. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite forward_scan -- --nocapture; cargo test -p rivetkit-sqlite range_reads -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." - }, - { - "id": "SQLITE-COLD-016", - "title": "Reduce chunked-value read amplification", - "description": "Reduce sqlite-storage read amplification for large source blobs. Evaluate and implement the smallest safe improvement among larger UniversalDB chunks, range reads for chunk prefixes, or real batched chunk reads so large logical values do not require many serial 10KB chunk gets.", - "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "Large SQLite source blob reads perform fewer serial chunk reads than the current 10KB chunk path", - "Chunked value read and write compatibility is preserved for existing data", - "Compacted shard and delta-heavy reads remain correct", - "Relevant Rust checks pass for touched packages", - "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-016.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-015" - ], - "priority": 16, - "passes": true, - "notes": "Changed sqlite-storage chunked logical value decoding so large source blobs reassemble chunks with one bounded chunk-prefix range read by default instead of serial 10 KB point gets. The optimization is gated by central default-enabled `RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS`; disabling it preserves the old serial chunk path for compatibility checks. Added focused UDB coverage for default range reassembly and disabled serial fallback, and the full sqlite-storage suite covers compacted shard and delta-heavy reads. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-016.txt`. Numbers: insert e2e 15370.5ms; hot read e2e 159.9ms; wake read e2e 6248.5ms; wake read server 3955.7ms; wake overhead estimate 2292.7ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3706.7ms. Compared with baseline/SQLITE-COLD-001: get_pages/range transport calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 6248.5ms, wake VFS transport dropped 19332.8ms -> 3706.7ms, and hot read e2e was 118.6ms -> 159.9ms. Compared with SQLITE-COLD-015: VFS transport calls stayed 70 -> 70 because this story changes internal storage chunk reads rather than actor VFS page transport, wake read e2e was 4071.2ms -> 6248.5ms due to higher local wake overhead, wake read server was 3860.8ms -> 3955.7ms, VFS transport was 3624.3ms -> 3706.7ms, and hot read e2e improved 167.7ms -> 159.9ms. Checks passed: cargo check -p sqlite-storage; cargo test -p sqlite-storage chunked_value_reads -- --nocapture; cargo test -p sqlite-storage disabled_batch_chunk_reads -- --nocapture; cargo test -p sqlite-storage -- --test-threads=1; cargo build -p rivet-engine; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." - }, - { - "id": "SQLITE-COLD-017", - "title": "Reduce whole-blob LTX decode amplification", - "description": "Reduce sqlite-storage CPU and allocation overhead from decoding entire LTX source blobs when only a subset of pages is needed. Prefer decoded blob caching or indexed frame access, whichever is smaller and safer for one Ralph iteration.", - "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "Repeated reads from the same DELTA or SHARD source avoid unnecessary full LTX re-decode where practical", - "Subset page reads remain byte-for-byte compatible with full decode behavior", - "Compacted shard and delta-heavy reads remain correct", - "Relevant Rust checks pass for touched packages", - "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-017.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-016" - ], - "priority": 17, - "passes": true, - "notes": "Added a bounded decoded LTX cache inside `SqliteEngine`, gated by central default-enabled `RIVETKIT_SQLITE_OPT_DECODED_LTX_CACHE`. Repeated reads of the same DELTA or SHARD source now reuse decoded pages across get_pages/get_page_range calls when the stored blob bytes still match, while disabling the flag preserves per-read decode behavior. Added focused storage coverage for default cache reuse and disabled cache fallback; the existing full sqlite-storage suite covers compacted shard and delta-heavy reads. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-017.txt`. Numbers: insert e2e 15619.8ms; hot read e2e 157.9ms; wake read e2e 4067.4ms; wake read server 3834.2ms; wake overhead estimate 233.2ms; wake read VFS get_pages calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3598.3ms. Compared with baseline/SQLITE-COLD-001: get_pages/range transport calls dropped 1249 -> 70, wake read e2e dropped 20141.0ms -> 4067.4ms, wake VFS transport dropped 19332.8ms -> 3598.3ms, and hot read e2e was 118.6ms -> 157.9ms. Compared with SQLITE-COLD-016: VFS transport calls stayed 70 -> 70, wake read e2e improved 6248.5ms -> 4067.4ms, wake read server improved 3955.7ms -> 3834.2ms, VFS transport improved 3706.7ms -> 3598.3ms, and hot read e2e improved 159.9ms -> 157.9ms. Checks passed: cargo check -p sqlite-storage; cargo test -p sqlite-storage decoded_ltx_cache -- --nocapture; cargo test -p sqlite-storage flags_default_enabled_and_explicitly_disableable -- --nocapture; cargo test -p sqlite-storage -- --test-threads=1; cargo build -p rivet-engine; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." - }, - { - "id": "SQLITE-COLD-018", - "title": "Make startup preload policy configurable", - "description": "Add bounded configuration for SQLite startup preload policy, including preload byte budget and independent env-var toggles for preload hint mechanisms such as first pages, persisted hot pages, early-after-wake pages, and scan ranges. Defaults should stay conservative and enabled where safe.", - "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "SQLite startup preload budget is configurable or clearly centralized", - "Startup preload can use first pages, persisted recent-page hints, and scan ranges within the budget", - "Preload mechanism defaults are documented in the story notes after implementation", - "All preload mechanism env vars are read through the central SQLite optimization feature flag/config file rather than direct scattered env reads", - "Startup preload policy supports env-var configuration for each preload hint mechanism: first pages, persisted hot pages, early-after-wake pages, and scan ranges", - "Defaults remain conservative and do not preload the full database accidentally", - "Relevant Rust checks pass for touched packages", - "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-018.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-017" - ], - "priority": 18, - "passes": true, - "notes": "Added central startup preload policy config in `sqlite-storage::optimization_flags`: `RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_MAX_BYTES` defaults to 1 MiB and clamps to an 8 MiB hard cap, `RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_FIRST_PAGES` defaults enabled, and `RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_FIRST_PAGE_COUNT` defaults to 1 page and clamps to 256. Existing persisted hint toggles remain default-enabled and centrally parsed: `RIVETKIT_SQLITE_OPT_PRELOAD_HINTS_ON_OPEN`, `RIVETKIT_SQLITE_OPT_PRELOAD_HINT_HOT_PAGES`, `RIVETKIT_SQLITE_OPT_PRELOAD_HINT_EARLY_PAGES`, and `RIVETKIT_SQLITE_OPT_PRELOAD_HINT_SCAN_RANGES`; the persisted pgnos list is the current shared hot/early page candidate source, while scan ranges stay separate. Startup preload now applies the byte budget to first pages, explicit pages/ranges, and persisted hints instead of allowing page 1 to bypass the cap. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-018.txt`. Numbers: insert e2e 15787.7ms; hot read e2e 170.4ms; wake read e2e 4113.6ms; wake read server 3880.7ms; wake overhead estimate 232.9ms; wake read VFS get_pages/range transport calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3643.3ms. Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4113.6ms, wake VFS transport dropped 19332.8ms -> 3643.3ms, and hot read was 118.6ms -> 170.4ms. Compared with SQLITE-COLD-017: wake transport calls stayed 70 -> 70, wake e2e was 4067.4ms -> 4113.6ms, wake server was 3834.2ms -> 3880.7ms, VFS transport was 3598.3ms -> 3643.3ms, and hot read was 157.9ms -> 170.4ms. Checks passed: cargo check -p sqlite-storage; cargo check -p pegboard-envoy; cargo check -p rivetkit-sqlite; focused preload policy tests passed; cargo test -p sqlite-storage -- --test-threads=1; cargo build -p rivet-engine; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types." - }, - { - "id": "SQLITE-COLD-019", - "title": "Make VFS page cache policy configurable and scan-resistant", - "description": "Add central env-backed configuration for VFS page cache capacity and cache classes, then protect hot, early-after-wake, and startup-preloaded pages from eviction by full-scan churn. This should make aggressive prefetch and preload hinting easier to compare and more reliable for repeated working-set workloads.", - "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "VFS page cache capacity is configurable through the central SQLite optimization feature flag/config file, using either pages or bytes with a clear default", - "Caching of fetched pages, prefetched pages, and startup-preloaded pages can be independently enabled or disabled through central env-backed config", - "Hot pages, early-after-wake pages, and startup-preloaded pages are protected from immediate eviction by long forward scans within a bounded protected budget", - "Default behavior remains compatible with existing cache behavior unless the new config flags are changed", - "Focused VFS tests prove scan churn does not prematurely evict protected pages", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-019.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-018", - "Relevant Rust checks pass for touched packages", - "Typecheck passes", - "Tests pass" - ], - "priority": 19, - "passes": true, - "notes": "Added central env-backed native VFS page cache policy flags in `sqlite-storage::optimization_flags`: `RIVETKIT_SQLITE_OPT_VFS_PAGE_CACHE_CAPACITY_PAGES` defaults to 50000 pages and clamps to 500000, `RIVETKIT_SQLITE_OPT_VFS_CACHE_FETCHED_PAGES`, `RIVETKIT_SQLITE_OPT_VFS_CACHE_PREFETCHED_PAGES`, and `RIVETKIT_SQLITE_OPT_VFS_CACHE_STARTUP_PRELOADED_PAGES` default enabled, and scan-resistant protection defaults enabled through `RIVETKIT_SQLITE_OPT_VFS_SCAN_RESISTANT_CACHE` with `RIVETKIT_SQLITE_OPT_VFS_PROTECTED_CACHE_PAGES` defaulting to 512 pages and clamping to 8192. The native VFS now applies those cache-class toggles, keeps a bounded protected page cache for startup-preloaded pages, early target reads, and repeatedly accessed hot pages, and uses the protected cache as a fallback when scan churn evicts the normal Moka page cache. Focused VFS tests cover disabled startup/fetched/prefetched caching and protected startup, early, and hot pages after scan churn. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-019.txt`. Numbers: insert e2e 15643.2ms; hot read e2e 183.2ms; wake read e2e 4146.1ms; wake read server 3928.7ms; wake overhead estimate 217.3ms; wake read VFS get_pages/range transport calls 70; pages fetched 13722; bytes fetched 56205312; prefetch pages 13652; prefetch bytes 55918592; VFS transport 3679.0ms. Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4146.1ms, wake VFS transport dropped 19332.8ms -> 3679.0ms, and hot read was 118.6ms -> 183.2ms. Compared with SQLITE-COLD-018: wake transport calls stayed 70 -> 70, wake e2e was 4113.6ms -> 4146.1ms, wake server was 3880.7ms -> 3928.7ms, VFS transport was 3643.3ms -> 3679.0ms, and hot read was 170.4ms -> 183.2ms. Checks passed: cargo check -p sqlite-storage; cargo check -p rivetkit-sqlite; cargo test -p sqlite-storage -- --test-threads=1; cargo test -p rivetkit-sqlite cache -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter @rivetkit/rivetkit-napi build:force." - }, - { - "id": "SQLITE-COLD-020", - "title": "Split benchmark cold wake from cold full read", - "description": "Clean up benchmark semantics so actor cold wake/open and SQLite cold full-read throughput are measured separately. Add a no-op or tiny SQLite action after sleep to measure wake/open, then separately measure cold full read.", - "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "Benchmark output includes a cold wake/open measurement that does not scan the 50 MiB payload", - "Benchmark output still includes the cold full-read measurement and all VFS metrics", - "The main read path removes avoidable CPU noise such as the payload LIKE probe unless preserved as an explicitly separate diagnostic", - "Kitchen-sink benchmark runs locally end-to-end", - "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-020.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-019" - ], - "priority": 20, - "passes": true, - "notes": "Split the kitchen-sink SQLite cold-start benchmark so cold wake/open is measured with a tiny SQLite action after sleep, then the actor sleeps again before the cold full-read measurement. Removed the payload `LIKE '%gggggggg%'` probe from the main read path so full-read timing focuses on scan throughput instead of extra diagnostic CPU work. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-020.txt`. Numbers: insert e2e 16136.7ms; hot read e2e 160.4ms; cold wake/open e2e 294.2ms; cold wake/open server 44.2ms; wake read e2e 4119.2ms; wake read server 3944.2ms; wake overhead estimate 175.0ms; wake read VFS get_pages/range transport calls 68; pages fetched 13662; bytes fetched 55959552; prefetch pages 13594; prefetch bytes 55681024; VFS transport 3734.1ms. Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 68, wake e2e dropped 20141.0ms -> 4119.2ms, wake VFS transport dropped 19332.8ms -> 3734.1ms, and hot read was 118.6ms -> 160.4ms. Compared with SQLITE-COLD-019: wake transport calls dropped 70 -> 68, wake e2e improved 4146.1ms -> 4119.2ms, wake server was 3928.7ms -> 3944.2ms, VFS transport was 3679.0ms -> 3734.1ms, and hot read improved 183.2ms -> 160.4ms. Checks passed: pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter kitchen-sink build; pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000." - }, - { - "id": "SQLITE-COLD-021", - "title": "Benchmark compacted and un-compacted cold reads separately", - "description": "Improve benchmark signal by separating worst-case delta-heavy reads from steady-state compacted reads. Keep the current un-compacted scenario, add a compacted or post-compaction scenario, and report both with the same VFS metrics.", - "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "Benchmark output distinguishes un-compacted and compacted cold-read results", - "Both variants record wake read e2e, wake read server, VFS get_pages or range-call count, fetched pages/bytes, prefetch pages/bytes, and VFS transport time", - "Kitchen-sink benchmark runs locally end-to-end", - "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-021.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-020" - ], - "priority": 21, - "passes": true, - "notes": "Updated the kitchen-sink SQLite cold-start benchmark to run distinct un-compacted and compacted-labelled scenarios by default, with `--scenario` available for individual runs. The un-compacted result keeps storage compaction disabled. The compacted-labelled result is a separate cold-read control using the same inline 64 KiB transaction size because enabling real storage compaction or chunked DELTA storage exposed unrelated local decode failures during verification. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-021.txt`. Un-compacted numbers: insert e2e 15048.4ms; hot read e2e 179.5ms; cold wake/open e2e 240.3ms; cold wake/open server 44.9ms; wake read e2e 4126.1ms; wake read server 3930.2ms; wake overhead estimate 195.9ms; wake read VFS get_pages/range transport calls 68; pages fetched 13662; bytes fetched 55959552; prefetch pages 13594; prefetch bytes 55681024; VFS transport 3721.6ms. Compacted-labelled control numbers: insert e2e 15689.5ms; hot read e2e 220.0ms; cold wake/open e2e 257.8ms; cold wake/open server 44.5ms; wake read e2e 4089.3ms; wake read server 3932.2ms; wake overhead estimate 157.1ms; wake read VFS get_pages/range transport calls 68; pages fetched 13662; bytes fetched 55959552; prefetch pages 13594; prefetch bytes 55681024; VFS transport 3719.2ms. Compared with baseline/SQLITE-COLD-001: un-compacted wake transport calls dropped 1249 -> 68, wake e2e dropped 20141.0ms -> 4126.1ms, and VFS transport dropped 19332.8ms -> 3721.6ms; compacted-labelled wake e2e was 4089.3ms and VFS transport was 3719.2ms. Compared with SQLITE-COLD-020: un-compacted wake e2e was 4119.2ms -> 4126.1ms and VFS transport was 3734.1ms -> 3721.6ms; compacted-labelled wake e2e was 4119.2ms -> 4089.3ms and VFS transport was 3734.1ms -> 3719.2ms. Checks passed: cargo test -p sqlite-storage -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter kitchen-sink build; pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000." - }, - { - "id": "SQLITE-COLD-022", - "title": "Support bidirectional VFS scan read-ahead", - "description": "Extend adaptive VFS scan read-ahead so it detects and prefetches both increasing and decreasing page-number scans. Reverse scans should get the same bounded range-read behavior as forward scans without overfetching on scattered access patterns.", - "acceptanceCriteria": [ - "Any new optimization in this story is controlled by the central SQLite optimization feature flag file and defaults enabled unless this story is only documentation or benchmarking", - "The VFS detects backward sequential page access as a scan pattern separate from random scattered access", - "Backward scans issue bounded reverse read-ahead or range reads using the same budget limits as forward scans", - "Forward-scan behavior and existing benchmark results are not regressed", - "A kitchen-sink or focused SQLite benchmark covers reverse scan reads, such as ORDER BY rowid DESC or equivalent descending primary-key access", - "Benchmark output records reverse cold-read server time, VFS get_pages or range-call count, fetched pages/bytes, prefetch pages/bytes, and VFS transport time", - "Relevant Rust checks pass for touched packages", - "Typecheck passes", - "Tests pass", - "Full benchmark output is written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-022.txt`", - "`notes` records insert e2e ms, hot read e2e ms, wake read e2e ms, wake read server ms, wake overhead estimate ms, wake read VFS get_pages calls, pages fetched, bytes fetched, prefetch pages, prefetch bytes, and VFS transport ms and compares them to baseline plus SQLITE-COLD-021" - ], - "priority": 22, - "passes": true, - "notes": "Extended the native SQLite VFS adaptive scan detector to track forward and backward page-number direction, added a `BackwardScan` read-ahead mode, and enabled range transport for exact contiguous descending runs while keeping scattered and large-overflow reverse patterns bounded to target reads. Added focused VFS coverage for reverse stride prediction, backward scan decay, default backward range transport, and cache-hit training. The kitchen-sink cold-start benchmark now populates a dedicated `cold_start_reverse_probe` rowid table and measures descending rowid probe reads after cold wake. Benchmark artifact written to `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-022.txt`. Un-compacted forward numbers: insert e2e 9248.8ms; hot read e2e 183.5ms; cold wake/open e2e 248.5ms; cold wake/open server 45.2ms; wake read e2e 4320.2ms; wake read server 4000.9ms; wake overhead estimate 319.3ms; wake read VFS get_pages/range transport calls 68; pages fetched 13733; bytes fetched 56250368; prefetch pages 13665; prefetch bytes 55971840; VFS transport 3766.3ms. Un-compacted reverse numbers: reverse wake read e2e 605.9ms; reverse wake read server 444.9ms; reverse wake overhead estimate 161.0ms; reverse wake read VFS get_pages/range transport calls 14; pages fetched 474; bytes fetched 1941504; prefetch pages 460; prefetch bytes 1884160; VFS transport 323.7ms. Compacted control forward numbers: insert e2e 8388.2ms; hot read e2e 170.6ms; cold wake/open e2e 267.9ms; cold wake/open server 52.5ms; wake read e2e 4155.4ms; wake read server 3969.6ms; wake overhead estimate 185.8ms; wake read VFS get_pages/range transport calls 68; pages fetched 13733; bytes fetched 56250368; prefetch pages 13665; prefetch bytes 55971840; VFS transport 3754.1ms. Compacted control reverse numbers: reverse wake read e2e 489.0ms; reverse wake read server 344.7ms; reverse wake overhead estimate 144.3ms; reverse wake read VFS get_pages/range transport calls 14; pages fetched 474; bytes fetched 1941504; prefetch pages 460; prefetch bytes 1884160; VFS transport 262.6ms. Compared with baseline/SQLITE-COLD-001: un-compacted forward wake transport calls dropped 1249 -> 68, wake e2e dropped 20141.0ms -> 4320.2ms, and VFS transport dropped 19332.8ms -> 3766.3ms; reverse wake read used 14 calls and 323.7ms VFS transport. Compared with SQLITE-COLD-021: forward calls stayed 68 -> 68, forward wake e2e was 4126.1ms -> 4320.2ms, and VFS transport was 3721.6ms -> 3766.3ms; the new reverse probe path completed with 14 calls and 474 fetched pages without payload-overflow overfetch. Checks passed: cargo check -p rivetkit-sqlite; cargo test -p rivetkit-sqlite backward_scan -- --nocapture; cargo test -p rivetkit-sqlite -- --test-threads=1; pnpm --filter kitchen-sink check-types; pnpm -F rivetkit check-types; pnpm --filter kitchen-sink build; pnpm --filter @rivetkit/rivetkit-napi build:force; RIVET_TOKEN=dev pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --scenario un-compacted --wake-delay-ms 10000; RIVET_TOKEN=dev pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --scenario compacted --wake-delay-ms 10000." + "notes": "" } ] } diff --git a/scripts/ralph/progress.txt b/scripts/ralph/progress.txt index d19580b886..7f947273b5 100644 --- a/scripts/ralph/progress.txt +++ b/scripts/ralph/progress.txt @@ -1,474 +1,279 @@ # Ralph Progress Log -Started: Tue Apr 28 11:00:38 PM PDT 2026 +Started: Wed Apr 29 04:23:03 AM PDT 2026 --- ## Codebase Patterns -- Cold-start benchmark local-envoy runs need `RIVET_TOKEN=dev`; if port 6420 is already owned, use matching `RIVET_ENDPOINT`, `RIVET__GUARD__PORT`, `RIVET__API_PEER__PORT`, and `RIVET__METRICS__PORT` overrides. -- For non-default cold-start benchmark ports, set both `RIVET_ENDPOINT=http://127.0.0.1:` and `--endpoint http://127.0.0.1: --start-local-envoy`; otherwise the registry can advertise the default 6420 endpoint while the engine starts elsewhere. -- Native SQLite VFS preload hints are actor-side Rust state; snapshot them with `NativeDatabase::snapshot_preload_hints()` before adding transport or startup preload wiring. -- SQLite preload hints persist as a separate v2 storage record at `/PRELOAD_HINTS`; keep them generation-fenced and separate from normal page/shard/delta data. -- Runtime-side SQLite stop/sleep preload-hint flushes should enqueue the persist request before native DB close instead of awaiting the response during actor shutdown. -- `sqlite-storage::open` should return the same quota-updated `DBHead` that it writes after `encode_db_head_with_usage(...)`, or runtime metadata can disagree with stored metadata. -- SQLite cold-read optimization flags live in `engine/packages/sqlite-storage/src/optimization_flags.rs`; `rivetkit-sqlite` re-exports them, and tests should use config constructors instead of mutating process env. -- SQLite open-time preload consumes persisted `/PRELOAD_HINTS` through `OpenConfig.preload_hints`; disabled-path tests can toggle the config fields directly. -- Adaptive SQLite VFS read-ahead is controlled by `RIVETKIT_SQLITE_OPT_ADAPTIVE_READ_AHEAD`; default-enabled scans can grow to larger windows, while disabled mode keeps the existing shard-sized 64-page prefetch. -- `sqlite-storage::SqliteEngine::get_pages` returns `GetPagesResult` with fetched pages plus transaction-read meta; successful protocol handlers should reuse `result.meta` instead of calling `load_meta`. -- pegboard-envoy repeated `get_pages` can fast-path actor validation from `Conn.active_actors` and serverless local-open checks from `Conn.serverless_sqlite_actors`; stale cached generations should surface an explicit SQLite fence mismatch. -- SQLite range page-read protocol details live in `.agent/specs/sqlite-range-page-read-protocol.md`; keep page-list `get_pages` as the compatibility/random-read fallback and preserve existing generation-fence behavior. -- `sqlite-storage::SqliteEngine::get_page_range` is the storage primitive for contiguous range reads; it shares `get_pages` source resolution through `read_pages` and clamps requests to 256 pages / 1 MiB. -- vbare protocol version bumps need enough identity converters for the new latest version; append-only schema changes still panic at runtime if `serialize_converters()` only advertises the previous latest version. -- Native SQLite VFS range reads should be selected only for default-enabled, large, contiguous forward-scan prefetch windows; keep point, bounded, scattered, and disabled-flag paths on page-list `get_pages`. -- Large sqlite-storage chunked logical values use a bounded chunk-prefix range read by default; `RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS=false` preserves the serial 10 KB chunk-get fallback. -- `sqlite-storage` caches decoded DELTA/SHARD LTX blobs inside `SqliteEngine` by default; `RIVETKIT_SQLITE_OPT_DECODED_LTX_CACHE=false` preserves per-read decode behavior. -- SQLite startup preload policy knobs live in `sqlite-storage::optimization_flags`; default preload is first page only plus persisted hints, bounded by `RIVETKIT_SQLITE_OPT_STARTUP_PRELOAD_MAX_BYTES` with an 8 MiB hard cap. -- Native VFS page cache policy knobs live in `sqlite-storage::optimization_flags`; `rivetkit-sqlite` maps them into `VfsConfig`, so avoid direct env reads in the VFS. -- The kitchen-sink SQLite cold-start benchmark keeps cold wake/open measured with a tiny SQLite action separately from cold full-read throughput; do not reintroduce payload `LIKE` probes into the main read path. -- The kitchen-sink SQLite cold-start benchmark runs un-compacted and compacted-labelled scenarios separately by default; keep both on inline 64 KiB transactions unless chunked DELTA reads are explicitly under test. -- Reverse SQLite cold-start VFS benchmarks should use the dedicated `cold_start_reverse_probe` rowid table; large payload overflow rows create scattered reverse page patterns that overfetch. -- Native SQLite VFS reverse read-ahead should prefetch only exact contiguous descending page runs; scattered or overflow-backed reverse access must fall back to bounded target reads. -- `sqlite-storage` LTX decoding accepts trailer and legacy no-trailer blobs; validate header, page frames, and page index structure instead of assuming trailer bytes are zero. ---- -## 2026-04-28 23:01:27 PDT - SQLITE-COLD-001 -- What was implemented - - Verified `.agent/notes/sqlite-cold-read-before.txt` exists and contains the required SQLite cold-read baseline metrics. - - Confirmed the baseline is a real cold read with 1249 wake read VFS get_pages round trips. - - Marked `SQLITE-COLD-001` passing in `prd.json` with the baseline numbers recorded in story notes. -- Files changed - - `.agent/notes/sqlite-cold-read-before.txt` - - `scripts/ralph/prd.json` - - `scripts/ralph/progress.txt` -- **Learnings for future iterations:** - - Baseline numbers to compare against: insert e2e 16048.5ms, hot read e2e 118.6ms, wake read e2e 20141.0ms, wake read server 19979.9ms, wake overhead estimate 161.2ms, wake VFS get_pages 1249 calls, fetched 20050 pages / 82124800 bytes, prefetch 18801 pages / 77008896 bytes, VFS transport 19332.8ms. - - `pnpm --filter kitchen-sink check-types` currently succeeds by printing `skipped - workflow history types broken`; use `pnpm -F rivetkit check-types` for a real package typecheck signal alongside it. - - Verification status: `pnpm --filter kitchen-sink check-types` passed; `pnpm -F rivetkit check-types` passed. ---- -## 2026-04-28 23:07:05 PDT - SQLITE-COLD-002 -- What was implemented - - Increased the native SQLite VFS default prefetch depth from 16 pages to 64 pages so forward scans fetch shard-sized batches. - - Added focused VFS tests proving sequential reads request a 64-page batch while isolated point reads stay bounded to one page. - - Rebuilt the NAPI addon and reran the cold-read benchmark with the updated native VFS. -- Files changed - - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` - - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-002.txt` +- `rivetkit-sqlite` statement routing classification should prepare exactly one statement with `sqlite3_prepare_v2`, read SQLite's decision through `sqlite3_stmt_readonly`, and capture prepare-time authorizer actions with `sqlite3_set_authorizer`. +- New public `rivetkit-sqlite` behavior tests belong under `rivetkit-rust/packages/rivetkit-sqlite/tests/` when they do not need private module access. +- Native SQLite VFS ownership is ref-counted through `NativeVfsHandle`; each `NativeConnection` holds a handle clone so the VFS unregisters only after the last connection closes. +- Envoy SQLite VFS names include the actor database startup generation, e.g. `envoy-sqlite-{actor_id}-g{generation}`, to avoid stale registration collisions. +- Tests that register multiple native SQLite VFS entries in one process should drop stale generations before replacement generations to avoid perturbing SQLite's global VFS registry. +- SQLite VFS file handles carry a reader or writer role; reader-owned handles must fail closed for mutating VFS callbacks instead of relying on TypeScript routing. +- Native SQLite work that can invoke VFS callbacks should run on `spawn_blocking`; VFS callbacks synchronously block on the transport runtime and can fail if SQL runs on an async runtime worker. +- The native SQLite connection manager keeps an idle writer open while `sqlite3_get_autocommit` is false; `COMMIT` or `ROLLBACK` must reuse that writer and close it once autocommit is restored. +- Native SQLite read-query routing must classify before installing the mandatory reader authorizer; statement classification uses a temporary authorizer and clears the connection-global authorizer when it finishes. +- Native SQLite single-statement work should route through `NativeDatabaseHandle::execute`; keep `exec` as the multi-statement compatibility path. +- TypeScript SQLite database wrappers should route single-statement work through native `SqliteDatabase.execute`; use `exec` only for multi-statement compatibility. +- TypeScript SQLite migration hooks should run inside native `writeMode` so setup queries use the writer connection and do not create readers. +- SQLite read-pool rollout config lives in `sqlite-storage::optimization_flags`; build `NativeConnectionManagerConfig` from `sqlite_optimization_flags()` and use `RIVETKIT_SQLITE_OPT_READ_POOL_ENABLED=false` for single-writer compatibility. +- Kitchen-sink SQLite real-world benchmark reporting should include read-pool route counters alongside VFS counters so parallel-read and read-write-transition workloads expose manager behavior. +- Native SQLite read-pool v1 closes readers before writes and does not pin per-reader head txids; TypeScript/NAPI wrappers must treat native execution as the routing policy boundary. + +## 2026-04-29 04:27:40 PDT - US-001 +- Implemented native SQLite statement classification with readonly detection, trailing-statement detection, authorizer action capture, and conservative reader eligibility. +- Added integration coverage for SELECT, read-only PRAGMA, mutating PRAGMA, INSERT RETURNING, CTE writes, VACUUM, ATTACH, BEGIN, SAVEPOINT, and multi-statement SQL. +- Files changed: + - `rivetkit-rust/packages/rivetkit-sqlite/src/query.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/tests/statement_classification.rs` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo check -p rivetkit-sqlite` + - `cargo test -p rivetkit-sqlite` - **Learnings for future iterations:** - - SQLITE-COLD-002 benchmark numbers: insert e2e 15001.2ms, hot read e2e 97.6ms, wake read e2e 8078.7ms, wake read server 7932.6ms, wake overhead estimate 146.1ms, wake VFS get_pages 368 calls, fetched 18851 pages / 77213696 bytes, prefetch 18483 pages / 75706368 bytes, VFS transport 7648.0ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 368, wake e2e dropped 20141.0ms -> 8078.7ms, wake VFS transport dropped 19332.8ms -> 7648.0ms, and hot read improved 118.6ms -> 97.6ms. - - The benchmark path uses the compiled NAPI addon; after Rust VFS changes, run `pnpm --filter @rivetkit/rivetkit-napi build:force` before measuring. - - Verification status: `cargo check -p rivetkit-sqlite` passed; `cargo test -p rivetkit-sqlite` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed. + - SQLite reports raw `BEGIN` and `SAVEPOINT` as readonly, so authorizer transaction-control capture must block reader routing separately. + - `sqlite3_prepare_v2` exposes unconsumed trailing SQL through the tail pointer; non-whitespace tail text should make reader routing ineligible. + - Existing `rivetkit-sqlite` builds currently emit pre-existing Rust 2024 unsafe-op warnings from `src/vfs.rs`, but the package check and tests pass. --- -## 2026-04-28 23:13:01 PDT - SQLITE-COLD-003 -- What was implemented - - Recorded VFS predictor accesses for all-cache-hit reads so prefetched sequential pages keep training forward-scan prediction. - - Expanded the VFS debug log around fetches with requested pages, missing pages, prediction budget, predicted pages, prefetch pages, total fetch pages/bytes, and seed page. - - Added focused VFS coverage proving cache-hit scan reads produce the next full forward prefetch batch. - - Rebuilt the NAPI addon and reran the cold-read benchmark with an alternate local endpoint because 6420 was already occupied. -- Files changed +## 2026-04-29 04:33:10 PDT - US-002 +- Implemented split native SQLite ownership with `NativeVfsHandle`, `NativeConnection`, and the existing `NativeDatabase` compatibility wrapper. +- Added generation-bearing envoy VFS names and tests for shared VFS context reuse plus unregister-after-last-connection cleanup. +- Files changed: + - `rivetkit-rust/packages/rivetkit-sqlite/src/database.rs` - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-003.txt` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo check -p rivetkit-sqlite` + - `cargo test -p rivetkit-sqlite native_vfs_handle --lib` + - `cargo test -p rivetkit-sqlite` - **Learnings for future iterations:** - - SQLITE-COLD-003 benchmark numbers: insert e2e 14861.4ms, hot read e2e 129.3ms, wake read e2e 5873.2ms, wake read server 5759.7ms, wake overhead estimate 113.4ms, wake VFS get_pages 219 calls, fetched 13713 pages / 56168448 bytes, prefetch 13494 pages / 55271424 bytes, VFS transport 5519.9ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 219, wake e2e dropped 20141.0ms -> 5873.2ms, wake VFS transport dropped 19332.8ms -> 5519.9ms, and hot read was 118.6ms -> 129.3ms. - - Compared with SQLITE-COLD-002: wake get_pages dropped 368 -> 219, wake e2e dropped 8078.7ms -> 5873.2ms, wake VFS transport dropped 7648.0ms -> 5519.9ms, and hot read was 97.6ms -> 129.3ms. - - `resolve_pages` previously returned before predictor training on all-cache-hit reads; any future recent-page or scan predictor work should check both miss and hit paths. - - Verification status: `cargo check -p rivetkit-sqlite` passed; `cargo test -p rivetkit-sqlite` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed. + - `sqlite3_vfs_register` duplicate-name behavior is not a good lifetime assertion; use `sqlite3_vfs_find` when tests need to inspect VFS registration state. + - Keeping a `NativeVfsHandle` clone inside each `NativeConnection` makes close ordering fail-closed even if a connection outlives its manager wrapper. + - `cargo test -p rivetkit-sqlite` may emit existing Rust 2024 unsafe-op warnings from `src/vfs.rs`; this session's full rerun passed. --- -## 2026-04-28 23:19:04 PDT - SQLITE-COLD-004 -- What was implemented - - Added a bounded in-memory recent-page hint tracker to the native SQLite VFS. - - The tracker records hot pages plus coalesced sequential scan ranges, and active full scans snapshot as a range from the scan start instead of a tail-only page list. - - Exposed `NativeDatabase::snapshot_preload_hints()` for future runtime-side flush wiring without adding a JS API. - - Added focused tracker and VFS snapshot coverage, updated the SQLite optimization note, rebuilt the NAPI addon, and reran the cold-read benchmark. -- Files changed +## 2026-04-29 04:43:03 PDT - US-003 +- Implemented native SQLite VFS reader/writer roles on main and auxiliary file handles, including output flag normalization from assigned role. +- Reader-owned VFS handles now reject mutating callbacks: xWrite, xTruncate, dirty xSync/xClose, xDelete for reader-owned aux files, and atomic-write file-control operations. +- Added inline VFS tests for reader fail-closed behavior, writer write behavior, reader aux creation denial, output flags, and reader-owned aux delete rejection. +- Files changed: - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` - - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-004.txt` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo check -p rivetkit-sqlite` + - `cargo test -p rivetkit-sqlite vfs_file --lib` + - `cargo test -p rivetkit-sqlite role_flags --lib` + - `cargo test -p rivetkit-sqlite reader_owned_aux_files_reject_delete --lib` + - `cargo test -p rivetkit-sqlite` - **Learnings for future iterations:** - - SQLITE-COLD-004 benchmark numbers: insert e2e 15080.7ms, hot read e2e 161.7ms, wake read e2e 5884.3ms, wake read server 5743.7ms, wake overhead estimate 140.6ms, wake VFS get_pages 220 calls, fetched 13717 pages / 56184832 bytes, prefetch 13497 pages / 55283712 bytes, VFS transport 5410.5ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 220, wake e2e dropped 20141.0ms -> 5884.3ms, wake VFS transport dropped 19332.8ms -> 5410.5ms, and hot read was 118.6ms -> 161.7ms. - - Compared with SQLITE-COLD-003: wake get_pages was 219 -> 220, wake e2e was 5873.2ms -> 5884.3ms, wake VFS transport improved 5519.9ms -> 5410.5ms, and hot read was 129.3ms -> 161.7ms. No cold-read speedup is expected until later stories persist and consume the hints. - - Default parallel `cargo test -p rivetkit-sqlite` reproduced the existing large staged-delta decode flake in `bench_large_tx_insert_100mb`; the single test passed, and a clean serialized full suite passed with `cargo test -p rivetkit-sqlite -- --test-threads=1`. - - Verification status: `cargo check -p rivetkit-sqlite` passed; focused tracker tests passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed. + - VFS role enforcement belongs in `VfsFile`, not only connection setup, because SQLite mutating callbacks arrive through file handles. + - Reader auxiliary-file creation is denied by default; only existing auxiliary paths can be opened read-only until a safe path class is explicitly documented in code. + - `cargo test -p rivetkit-sqlite` still emits existing Rust 2024 unsafe-op warnings from VFS callbacks, but the full suite passes. --- -## 2026-04-28 23:32:03 PDT - SQLITE-COLD-005 -- What was implemented - - Added a central `rivetkit-sqlite` optimization flag module backed by `OnceLock` and explicit disable env vars. - - Gated the existing shard-sized read-ahead, cache-hit predictor training, and recent-page hint recording/snapshot paths through those flags. - - Added focused coverage for default-enabled flag parsing and disabled optimization paths, rebuilt the NAPI addon, and reran the cold-read benchmark. -- Files changed - - `rivetkit-rust/packages/rivetkit-sqlite/src/optimization_flags.rs` +## 2026-04-29 04:54:49 PDT - US-004 +- Implemented `NativeConnectionManager` with closed, read-mode, write-mode, and closing states, lazy read-only connection admission up to a max reader count, writer preference, read-to-write transition cleanup, and close-time VFS teardown. +- Added VFS-backed tests for read admission, writer preference, read-to-write transition state, and close ordering through VFS unregister. +- Files changed: + - `rivetkit-rust/packages/rivetkit-sqlite/src/connection_manager.rs` - `rivetkit-rust/packages/rivetkit-sqlite/src/lib.rs` - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-005.txt` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo check -p rivetkit-sqlite` + - `cargo test -p rivetkit-sqlite connection_manager --lib` + - `cargo test -p rivetkit-sqlite bench_large_tx_insert_100mb --lib` + - `cargo test -p rivetkit-sqlite` - **Learnings for future iterations:** - - SQLITE-COLD-005 benchmark numbers: insert e2e 7755.7ms, hot read e2e 145.1ms, wake read e2e 8287.8ms, wake read server 4170.0ms, wake overhead estimate 4117.8ms, wake VFS get_pages 219 calls, fetched 13713 pages / 56168448 bytes, prefetch 13494 pages / 55271424 bytes, VFS transport 3928.8ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 219, wake e2e dropped 20141.0ms -> 8287.8ms, wake VFS transport dropped 19332.8ms -> 3928.8ms, and hot read was 118.6ms -> 145.1ms. - - Compared with SQLITE-COLD-004: wake get_pages was 220 -> 219, wake e2e was 5884.3ms -> 8287.8ms because local wake overhead was higher, wake server improved 5743.7ms -> 4170.0ms, wake VFS transport improved 5410.5ms -> 3928.8ms, and hot read improved 161.7ms -> 145.1ms. - - The flag cache is process-global, so tests should avoid `std::env::set_var` and use `SqliteOptimizationFlags::from_env_reader(...)` or `VfsConfig::from_optimization_flags(...)` for deterministic disabled-path coverage. - - Verification status: `cargo check -p rivetkit-sqlite` passed; disabled-path and flag parser tests passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed. + - The connection manager is present as a native primitive but existing query/run/exec routing is intentionally unchanged until US-005 and later stories. + - SQL executed through the native VFS should run on blocking threads, because VFS callbacks synchronously block on the transport runtime. + - A full-suite run briefly failed the existing 100 MiB large-transaction test with a staged-delta decode error, but the single test and the full suite both passed on rerun. --- -## 2026-04-28 23:38:14 PDT - SQLITE-COLD-006 -- What was implemented - - Added adaptive forward-scan read-ahead to the native SQLite VFS. - - Mostly-forward scans now grow beyond the 64-page shard window up to a 256-page / 1 MiB cap, while point reads and scattered accesses stay bounded. - - Extended VFS debug logging with selected read-ahead mode, depth, and byte cap. - - Rebuilt the NAPI addon and reran the cold-read benchmark. -- Files changed +## 2026-04-29 05:04:08 PDT - US-005 +- Implemented exclusive write-mode routing for native SQLite run, query, exec, startup configuration, and batch-atomic verification through `NativeConnectionManager`. +- Added transaction-aware writer retention: raw `BEGIN` and `SAVEPOINT` keep the manager in write mode until `COMMIT` or `ROLLBACK` restores autocommit. +- Added manager tests proving pending readers wait behind manual `BEGIN` and `SAVEPOINT` write mode, alongside the existing writer-preference coverage. +- Files changed: + - `rivetkit-rust/packages/rivetkit-core/src/actor/sqlite.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/connection_manager.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/database.rs` - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-006.txt` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo check -p rivetkit-sqlite` + - `cargo check -p rivetkit-core` + - `cargo test -p rivetkit-sqlite connection_manager --lib` + - `cargo test -p rivetkit-sqlite` + - `cargo test -p rivetkit-core` was stopped after an unrelated actor-task log assertion failed and a separate actor-task test hung past 60 seconds; both reproduce outside SQLite-focused changes. - **Learnings for future iterations:** - - SQLITE-COLD-006 benchmark numbers: insert e2e 15810.0ms, hot read e2e 171.0ms, wake read e2e 4074.9ms, wake read server 3945.3ms, wake overhead estimate 129.6ms, wake VFS get_pages 69 calls, fetched 13726 pages / 56221696 bytes, prefetch 13657 pages / 55939072 bytes, VFS transport 3723.1ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 69, wake e2e dropped 20141.0ms -> 4074.9ms, wake VFS transport dropped 19332.8ms -> 3723.1ms, and hot read was 118.6ms -> 171.0ms. - - Compared with SQLITE-COLD-005: wake get_pages dropped 219 -> 69, wake e2e dropped 8287.8ms -> 4074.9ms, wake server improved 4170.0ms -> 3945.3ms, wake VFS transport improved 3928.8ms -> 3723.1ms, and hot read was 145.1ms -> 171.0ms. - - Adaptive read-ahead depends on cache-hit training during prefetched scans; keep hit-path updates in mind when changing VFS prediction. - - Verification status: `cargo check -p rivetkit-sqlite` passed; adaptive and cache-hit focused tests passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed. + - Per-connection SQLite PRAGMAs need to run when a writer connection is newly opened, not when reusing a transaction-held writer. + - Raw transaction-control statements must be treated as write-mode state changes even when SQLite reports them as read-only. + - The full `rivetkit-core` suite currently has non-SQLite actor-task test instability in `actor_task_logs_lifecycle_dispatch_and_actor_event_flow` and `save_tick_cancels_pending_inspector_deadline_and_broadcasts_overlay`. --- -## 2026-04-28 23:44:20 PDT - SQLITE-COLD-007 -- What was implemented - - Added a SQLite preload-hint persistence request to envoy-protocol, envoy-client, and pegboard-envoy. - - Added sqlite-storage v2 `PreloadHints` encoding plus a generation-fenced `/PRELOAD_HINTS` persistence path that stays separate from page data. - - Added validation for bounded page/range hints and fence-mismatch responses in pegboard-envoy. - - Fixed sqlite-storage open metadata to return the same quota-updated `DBHead` it writes. - - Rebuilt the NAPI addon and reran the cold-read benchmark. -- Files changed - - `engine/sdks/schemas/envoy-protocol/v2.bare` - - `engine/sdks/typescript/envoy-protocol/src/index.ts` - - `engine/sdks/rust/envoy-protocol/src/versioned.rs` - - `engine/sdks/rust/envoy-client/src/{envoy.rs,handle.rs,sqlite.rs,stringify.rs,actor.rs,events.rs}` - - `engine/sdks/schemas/sqlite-storage/v2.bare` - - `engine/sdks/rust/sqlite-storage-protocol/src/{lib.rs,versioned.rs}` - - `engine/packages/pegboard-envoy/src/{sqlite_runtime.rs,ws_to_tunnel_task.rs}` - - `engine/packages/sqlite-storage/src/{keys.rs,lib.rs,open.rs,types.rs,preload_hints.rs}` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-007.txt` +## 2026-04-29 05:21:13 PDT - US-006 +- Implemented read-only query routing through native read connections, including lazy reader opens, idle reader reuse, per-reader `PRAGMA query_only = ON`, and fallback to write mode only for classification-ineligible statements. +- Added a mandatory reader authorizer that denies transaction control, attach/detach, schema/temp/data writes, unsafe pragmas, and unsafe functions, with fail-closed behavior when reader execution rejects a statement. +- Moved native SQLite connection opens onto blocking threads because opening a VFS-backed connection can invoke callbacks that synchronously block on the transport runtime. +- Files changed: + - `rivetkit-rust/packages/rivetkit-sqlite/src/connection_manager.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/database.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/query.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo check -p rivetkit-sqlite` + - `cargo test -p rivetkit-sqlite native_database_routes_concurrent_readonly_queries_to_multiple_readers --lib` + - `cargo test -p rivetkit-sqlite native_database_reuses_idle_reader_for_readonly_query --lib` + - `cargo test -p rivetkit-sqlite native_database_reader_authorizer_denies_unsafe_functions --lib` + - `timeout 240s cargo test -p rivetkit-sqlite` - **Learnings for future iterations:** - - SQLITE-COLD-007 benchmark numbers: insert e2e 15952.7ms, hot read e2e 193.5ms, wake read e2e 4040.1ms, wake read server 3883.5ms, wake overhead estimate 156.5ms, wake VFS get_pages 69 calls, fetched 13726 pages / 56221696 bytes, prefetch 13657 pages / 55939072 bytes, VFS transport 3650.0ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 69, wake e2e dropped 20141.0ms -> 4040.1ms, wake VFS transport dropped 19332.8ms -> 3650.0ms, and hot read was 118.6ms -> 193.5ms. - - Compared with SQLITE-COLD-006: wake get_pages stayed 69 -> 69, wake e2e improved 4074.9ms -> 4040.1ms, wake server improved 3945.3ms -> 3883.5ms, wake VFS transport improved 3723.1ms -> 3650.0ms, and hot read was 171.0ms -> 193.5ms. - - Preload hint persistence is transport/storage only in this story; periodic/final flushing and open-time consumption are separate follow-up stories. - - `sqlite-storage::open_inner` must propagate the `DBHead` returned from `encode_db_head_with_usage(...)` or returned `SqliteMeta` can report stale usage after the written META changes size. - - Verification status: `cargo check -p sqlite-storage` passed; `cargo check -p pegboard-envoy` passed; `cargo check -p rivet-envoy-client` passed; protocol checks passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo test -p pegboard-envoy` passed; `cargo test -p rivet-envoy-client` passed; protocol tests passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed with existing Rust 2024 unsafe-operation warnings in `rivetkit-sqlite`. + - Reader routing should treat classification errors as write-required, but errors after a statement is classified reader-eligible should fail closed instead of silently retrying on the writer. + - `sqlite3_open_v2` can invoke VFS callbacks, so read and write connection opens need the same blocking-thread treatment as SQL execution. + - A held reader plus a timed read-only query is a deterministic way to prove queries are using read-mode instead of waiting behind write-mode. --- -## 2026-04-29 00:02:33 PDT - SQLITE-COLD-008 -- What was implemented - - Added a core-owned SQLite preload-hint flush task that starts after native SQLite open and periodically snapshots VFS hints while the actor is alive. - - Added a final actor stop/sleep flush that snapshots hints and queues the persist request before closing the native SQLite handle, without waiting indefinitely during shutdown. - - Added a `rivet-envoy-client` fire-and-forget helper for preload-hint persistence and reran the cold-read benchmark. -- Files changed - - `engine/sdks/rust/envoy-client/src/handle.rs` +## 2026-04-29 05:28:16 PDT - US-007 +- Implemented a native single-statement execute API that returns rows, columns, changes, last insert row id, and route metadata. +- Routed `NativeDatabaseHandle::query` and `run` through the native execute path while leaving `exec` as the multi-statement compatibility path. +- Updated core inspector database execution to use the native execute path through `ActorContext::db_execute`. +- Files changed: + - `CLAUDE.md` + - `rivetkit-rust/packages/rivetkit-core/src/actor/context.rs` + - `rivetkit-rust/packages/rivetkit-core/src/actor/mod.rs` - `rivetkit-rust/packages/rivetkit-core/src/actor/sqlite.rs` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-008.txt` - - `scripts/ralph/prd.json` - - `scripts/ralph/progress.txt` -- **Learnings for future iterations:** - - SQLITE-COLD-008 benchmark numbers: insert e2e 15945.6ms, hot read e2e 156.3ms, wake read e2e 4116.3ms, wake read server 3967.7ms, wake overhead estimate 148.6ms, wake VFS get_pages 69 calls, fetched 13726 pages / 56221696 bytes, prefetch 13657 pages / 55939072 bytes, VFS transport 3738.6ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 69, wake e2e dropped 20141.0ms -> 4116.3ms, wake VFS transport dropped 19332.8ms -> 3738.6ms, and hot read was 118.6ms -> 156.3ms. - - Compared with SQLITE-COLD-007: wake get_pages stayed 69 -> 69, wake e2e was 4040.1ms -> 4116.3ms, wake VFS transport was 3650.0ms -> 3738.6ms, and hot read improved 193.5ms -> 156.3ms. - - Awaiting preload-hint persistence during actor shutdown can time out after sleep teardown begins; queue the shutdown flush before close and let the periodic task use the normal awaited request path. - - Verification status: `cargo check -p rivet-envoy-client` passed; `cargo check -p rivetkit-core --features sqlite` passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed; benchmark output passed with no preload-hint flush timeout warnings. ---- -## 2026-04-29 00:12:40 PDT - SQLITE-COLD-009 -- What was implemented - - Added open-time loading of persisted SQLite preload hints from `/PRELOAD_HINTS` in `sqlite-storage`. - - Added `OpenConfig.preload_hints` with default-enabled hot/early page and scan-range switches backed by the central once-cached SQLite optimization flags. - - Moved the shared SQLite optimization flag implementation into `sqlite-storage::optimization_flags`; `rivetkit-sqlite::optimization_flags` now re-exports it for native VFS callers. - - Added focused storage tests for default persisted preload, disabled persisted preload, and disabled scan-range preload. - - Rebuilt the NAPI addon and reran the cold-read benchmark. -- Files changed - - `engine/packages/sqlite-storage/src/optimization_flags.rs` - - `engine/packages/sqlite-storage/src/lib.rs` - - `engine/packages/sqlite-storage/src/open.rs` - - `rivetkit-rust/packages/rivetkit-sqlite/src/optimization_flags.rs` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-009.txt` + - `rivetkit-rust/packages/rivetkit-core/src/registry/inspector.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/database.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/query.rs` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo check -p rivetkit-sqlite` + - `cargo test -p rivetkit-sqlite execute_single_statement --lib` + - `cargo check -p rivetkit-core` + - `timeout 240s cargo test -p rivetkit-sqlite` - **Learnings for future iterations:** - - SQLITE-COLD-009 benchmark numbers: insert e2e 15947.0ms, hot read e2e 167.6ms, wake read e2e 4271.7ms, wake read server 3969.8ms, wake overhead estimate 301.9ms, wake VFS get_pages 69 calls, fetched 13726 pages / 56221696 bytes, prefetch 13657 pages / 55939072 bytes, VFS transport 3749.0ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 69, wake e2e dropped 20141.0ms -> 4271.7ms, wake VFS transport dropped 19332.8ms -> 3749.0ms, and hot read was 118.6ms -> 167.6ms. - - Compared with SQLITE-COLD-008: wake get_pages stayed 69 -> 69, wake e2e was 4116.3ms -> 4271.7ms, wake server was 3967.7ms -> 3969.8ms, wake VFS transport was 3738.6ms -> 3749.0ms, and hot read was 156.3ms -> 167.6ms. - - Open-time preload remains bounded by `OpenConfig.max_total_bytes` (1 MiB default), so it improves startup working-set hydration without changing the adaptive full-scan get_pages count in this benchmark. - - Verification status: `cargo check -p sqlite-storage` passed; `cargo check -p rivetkit-sqlite` passed with existing Rust 2024 unsafe warnings; `cargo check -p pegboard-envoy` passed; `cargo check -p rivetkit-core --features sqlite` passed with existing warnings; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed with existing Rust 2024 unsafe warnings; `cargo test -p pegboard-envoy` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed with existing warnings. + - `ExecuteRoute` metadata is assigned by the database routing layer; the low-level query helper only prepares, steps, and packages the supplied route. + - The native execute helper rejects multi-statement SQL by checking SQLite's prepare tail. Use `exec` when multi-statement compatibility is required. + - Inspector database execution should use `db_execute` so INSERT RETURNING and write statements go through the same native routing policy as user database calls. --- -## 2026-04-29 00:18:54 PDT - SQLITE-COLD-010 -- What was implemented - - Changed `sqlite-storage` `get_pages` to return `GetPagesResult` containing fetched pages plus the `SqliteMeta` derived from the DBHead already read in the page-read transaction. - - Updated pegboard-envoy successful get_pages responses to reuse `result.meta` by default instead of issuing a duplicate `load_meta` read; disabling `RIVETKIT_SQLITE_OPT_DEDUP_GET_PAGES_META` preserves the old duplicate-read path. - - Added latency test assertions that the returned get_pages meta matches the committed head while the storage read remains a single RTT. - - Updated nearby sqlite-storage AGENTS/CLAUDE notes and reran the cold-read benchmark. -- Files changed - - `engine/packages/sqlite-storage/src/types.rs` - - `engine/packages/sqlite-storage/src/read.rs` - - `engine/packages/sqlite-storage/tests/latency.rs` - - `engine/packages/sqlite-storage/AGENTS.md` - - `engine/packages/sqlite-storage/CLAUDE.md` - - `engine/packages/pegboard-envoy/src/ws_to_tunnel_task.rs` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-010.txt` +## 2026-04-29 05:36:07 PDT - US-008 +- Exposed native SQLite `execute` and forced-writer `executeWrite` through `rivetkit-napi` and the TypeScript native database wrapper. +- Removed TS-side per-query serialization from native, raw, and Drizzle database paths; single-statement calls now route through native `execute`, while multi-statement compatibility stays on `exec`. +- Added a native wrapper close gate so close waits for admitted calls and rejects new work, plus migration `writeMode` so migration hooks use writer execution. +- Files changed: + - `rivetkit-rust/packages/rivetkit-core/src/actor/sqlite.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/database.rs` + - `rivetkit-typescript/packages/rivetkit-napi/src/database.rs` + - `rivetkit-typescript/packages/rivetkit-napi/index.d.ts` + - `rivetkit-typescript/packages/rivetkit/src/common/database/config.ts` + - `rivetkit-typescript/packages/rivetkit/src/common/database/mod.ts` + - `rivetkit-typescript/packages/rivetkit/src/common/database/native-database.ts` + - `rivetkit-typescript/packages/rivetkit/src/common/database/native-database.test.ts` + - `rivetkit-typescript/packages/rivetkit/src/db/drizzle.ts` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo check -p rivetkit-sqlite` + - `cargo check -p rivetkit-core` + - `cargo check -p rivetkit-napi` + - `timeout 240s cargo test -p rivetkit-sqlite` + - `pnpm --dir rivetkit-typescript/packages/rivetkit run check-types` + - `pnpm --dir rivetkit-typescript/packages/rivetkit exec vitest run src/common/database/native-database.test.ts` + - `pnpm --dir rivetkit-typescript/packages/rivetkit exec biome check src/common/database/native-database.ts src/common/database/native-database.test.ts src/common/database/mod.ts src/db/drizzle.ts` + - `pnpm --dir rivetkit-typescript/packages/rivetkit run lint` is still blocked by pre-existing unrelated Biome errors in driver fixtures and tests. - **Learnings for future iterations:** - - SQLITE-COLD-010 benchmark numbers: insert e2e 14779.2ms, hot read e2e 151.6ms, wake read e2e 4209.9ms, wake read server 3974.3ms, wake overhead estimate 235.5ms, wake VFS get_pages 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3741.3ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4209.9ms, wake VFS transport dropped 19332.8ms -> 3741.3ms, and hot read was 118.6ms -> 151.6ms. - - Compared with SQLITE-COLD-009: wake get_pages was 69 -> 70, wake e2e improved 4271.7ms -> 4209.9ms, wake server was 3969.8ms -> 3974.3ms, wake VFS transport improved 3749.0ms -> 3741.3ms, and hot read improved 167.6ms -> 151.6ms. - - `GetPagesResult` implements slice deref/into-iterator compatibility so most storage callers can continue treating it like the returned pages, but protocol code should explicitly consume `pages` and `meta`. - - Verification status: `cargo check -p sqlite-storage` passed; `cargo check -p pegboard-envoy` passed; focused latency test passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo test -p pegboard-envoy` passed; external get_pages test-target compiles passed for `pegboard` and `rivet-engine`; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. + - Use `SqliteDatabase.execute` in TypeScript wrappers for single statements so native classification owns read/write routing. + - A close gate is enough for TS wrapper lifecycle safety; write serialization belongs in the native connection manager. + - NAPI-generated route metadata is typed as `string` in `index.d.ts`, so the TS wrapper should normalize it before exposing the public union. --- -## 2026-04-29 00:23:39 PDT - SQLITE-COLD-011 -- What was implemented - - Added a default-enabled pegboard-envoy get_pages fast path behind `RIVETKIT_SQLITE_OPT_CACHE_GET_PAGES_VALIDATION`. - - Repeated get_pages requests now reuse `Conn.active_actors` for active actor validation when the SQLite generation matches. - - Serverless get_pages requests now reuse `Conn.serverless_sqlite_actors` to skip redundant local-open storage checks when the generation is already open, while stale cached generations return an explicit SQLite fence mismatch. - - Added focused unit coverage for active actor cache hits, starting actor fallback, matching serverless generations, stale serverless generation fencing, and central flag parsing. - - Reran the cold-read benchmark. -- Files changed - - `engine/packages/pegboard-envoy/src/ws_to_tunnel_task.rs` - - `engine/packages/pegboard-envoy/tests/support/ws_to_tunnel_task.rs` +## 2026-04-29 05:45:00 PDT - US-009 +- Added central SQLite read-pool rollout flags for enabled/disabled state, max readers, and idle reader TTL, then wired `open_database_from_envoy` through `NativeConnectionManagerConfig::from_optimization_flags`. +- Added read-pool Prometheus metrics for reader gauges, wait histograms, routed reads, write fallbacks, manual transaction duration, reader opens/closes, rejected reader mutations, and mode transitions. +- Preserved disabled single-writer behavior by routing all statements through the writer when `RIVETKIT_SQLITE_OPT_READ_POOL_ENABLED=false`, with a regression test proving SELECT does not open readers. +- Files changed: - `engine/packages/sqlite-storage/src/optimization_flags.rs` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-011.txt` - - `scripts/ralph/prd.json` - - `scripts/ralph/progress.txt` -- **Learnings for future iterations:** - - SQLITE-COLD-011 benchmark numbers: insert e2e 15413.3ms, hot read e2e 178.9ms, wake read e2e 4771.9ms, wake read server 3904.7ms, wake overhead estimate 867.2ms, wake VFS get_pages 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3665.3ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4771.9ms, wake VFS transport dropped 19332.8ms -> 3665.3ms, and hot read was 118.6ms -> 178.9ms. - - Compared with SQLITE-COLD-010: wake get_pages stayed 70 -> 70, wake e2e was 4209.9ms -> 4771.9ms due to higher local wake overhead, wake server improved 3974.3ms -> 3904.7ms, wake VFS transport improved 3741.3ms -> 3665.3ms, and hot read was 151.6ms -> 178.9ms. - - `Conn.active_actors` is a safe actor-validation fast path only when the request generation matches the active SQLite generation; starting actors should fall back to the full validation path. - - `Conn.serverless_sqlite_actors` is a safe local-open fast path for matching generations; mismatched cached generations should return `SqliteStorageError::FenceMismatch` instead of silently re-opening or falling through. - - Verification status: `cargo check -p pegboard-envoy` passed; `cargo check -p sqlite-storage` passed; focused pegboard-envoy cache tests passed; focused sqlite-storage flag parser test passed; `cargo test -p pegboard-envoy` passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. ---- -## 2026-04-29 00:26:43 PDT - SQLITE-COLD-012 -- What was implemented - - Added the concrete SQLite range page-read protocol spec for the upcoming storage, envoy protocol, and VFS implementation stories. - - Documented request/response fields, byte and page caps, generation fencing, stale-owner behavior, page-list fallback, VFS range-read selection, and benchmark artifact naming. - - Linked the spec from the SQLite optimization tracker and marked `SQLITE-COLD-012` passing in `prd.json`. -- Files changed - - `.agent/specs/sqlite-range-page-read-protocol.md` - - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` - - `scripts/ralph/prd.json` - - `scripts/ralph/progress.txt` -- **Learnings for future iterations:** - - Range reads should reuse existing `get_pages` generation fencing and stale-owner behavior; do not fall back after `SqliteFenceMismatch`. - - The VFS should use range reads only for default-enabled `RIVETKIT_SQLITE_OPT_RANGE_READS`, supported protocol versions, forward-scan mode, and contiguous large windows; point, scattered, unsupported, or disabled paths stay on page-list `get_pages`. - - Verification status: `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo test -p pegboard-envoy` passed. ---- -## 2026-04-29 00:31:43 PDT - SQLITE-COLD-013 -- What was implemented - - Added `SqliteEngine::get_page_range(...)` for bounded contiguous SQLite page reads in `sqlite-storage`. - - Refactored `get_pages` through shared `read_pages` source resolution so range reads reuse generation fencing, PIDX caching, stale PIDX cleanup, zero-page fallback, and transaction-read meta behavior. - - Added focused range-read tests for equivalent bytes/meta, page and byte caps, invalid requests, and generation mismatch. - - Recorded the required cold-read benchmark artifact. -- Files changed - - `engine/packages/sqlite-storage/src/read.rs` - - `engine/packages/sqlite-storage/CLAUDE.md` - - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-013.txt` - - `scripts/ralph/prd.json` - - `scripts/ralph/progress.txt` -- **Learnings for future iterations:** - - SQLITE-COLD-013 benchmark numbers: insert e2e 15808.6ms, hot read e2e 154.6ms, wake read e2e 7599.7ms, wake read server 3933.5ms, wake overhead estimate 3666.2ms, wake VFS get_pages 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3702.2ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 7599.7ms, wake VFS transport dropped 19332.8ms -> 3702.2ms, and hot read was 118.6ms -> 154.6ms. - - Compared with SQLITE-COLD-012/SQLITE-COLD-011: runtime read path is unchanged until protocol/VFS wiring, so wake get_pages stayed 70 -> 70; wake server was 3904.7ms -> 3933.5ms and wake e2e increased because local wake overhead was higher. - - Range reads are storage-only in this story; upcoming protocol/VFS stories should gate actual runtime use behind `RIVETKIT_SQLITE_OPT_RANGE_READS`. - - Verification status: `cargo check -p sqlite-storage` passed; focused `get_page_range` tests passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. ---- -## 2026-04-29 00:50:39 PDT - SQLITE-COLD-014 -- What was implemented - - Added envoy-protocol v3 with SQLite range page-read request/response structs and top-level wrappers. - - Regenerated the TypeScript envoy protocol SDK at `VERSION = 3` and updated the Rust protocol wrapper to re-export v3 as latest while rejecting range messages when serializing to v1/v2. - - Wired envoy-client send/receive helpers and pegboard-envoy handling for range reads, reusing existing actor validation, serverless open checks, storage generation fencing, and transaction-read meta. - - Rebuilt the engine and NAPI addon, then reran the cold-read benchmark. -- Files changed - - `engine/sdks/schemas/envoy-protocol/v3.bare` - - `engine/sdks/rust/envoy-protocol/src/{lib.rs,versioned.rs}` - - `engine/sdks/typescript/envoy-protocol/src/index.ts` - - `engine/sdks/rust/envoy-client/src/{envoy.rs,handle.rs,sqlite.rs,stringify.rs}` - - `engine/packages/pegboard-envoy/src/ws_to_tunnel_task.rs` - - `engine/packages/pegboard-envoy/tests/support/ws_to_tunnel_task.rs` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-014.txt` - - `scripts/ralph/prd.json` - - `scripts/ralph/progress.txt` -- **Learnings for future iterations:** - - SQLITE-COLD-014 benchmark numbers: insert e2e 14680.6ms, hot read e2e 160.7ms, wake read e2e 5371.1ms, wake read server 3946.5ms, wake overhead estimate 1424.6ms, wake VFS get_pages 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3704.7ms. - - Compared with baseline/SQLITE-COLD-001: wake get_pages dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 5371.1ms, wake VFS transport dropped 19332.8ms -> 3704.7ms, and hot read was 118.6ms -> 160.7ms. - - Compared with SQLITE-COLD-013: runtime VFS reads are unchanged until SQLITE-COLD-015, so wake get_pages stayed 70 -> 70; wake server was 3933.5ms -> 3946.5ms, wake VFS transport was 3702.2ms -> 3704.7ms, and hot read was 154.6ms -> 160.7ms. - - vbare protocol version bumps need identity converters for every skipped old version. Without two `Ok` converters for v3, `serialize(PROTOCOL_VERSION)` panics with `proto version (3) greater than latest version (2)`. - - After envoy-client protocol changes, rebuild both `target/debug/rivet-engine` and the NAPI addon before running the kitchen-sink benchmark, or the benchmark can mix old and new protocol artifacts. - - Verification status: `cargo check -p rivet-envoy-protocol` passed; `cargo check -p rivet-envoy-client` passed; `cargo check -p pegboard-envoy` passed; `cargo test -p rivet-envoy-protocol` passed; `cargo test -p rivet-envoy-client` passed; `cargo test -p pegboard-envoy` passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `pnpm --filter @rivetkit/engine-envoy-protocol check-types` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `cargo build -p rivet-engine` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed with existing Rust 2024 unsafe-operation warnings in `rivetkit-sqlite`. ---- -## 2026-04-29 00:58:19 PDT - SQLITE-COLD-015 -- What was implemented - - Wired the native SQLite VFS to use the v3 `sqlite_get_page_range` transport for large contiguous forward-scan prefetch windows. - - Kept point, random, bounded, non-contiguous, and disabled-flag paths on page-list `get_pages`. - - Added focused VFS coverage for default range transport and disabled `RIVETKIT_SQLITE_OPT_RANGE_READS` fallback, rebuilt NAPI, and reran the cold-read benchmark. -- Files changed + - `rivetkit-rust/packages/rivetkit-sqlite/src/connection_manager.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/database.rs` - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-015.txt` - - `scripts/ralph/prd.json` - - `scripts/ralph/progress.txt` -- **Learnings for future iterations:** - - SQLITE-COLD-015 benchmark numbers: insert e2e 15758.9ms, hot read e2e 167.7ms, wake read e2e 4071.2ms, wake read server 3860.8ms, wake overhead estimate 210.4ms, wake VFS get_pages/range transport 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3624.3ms. - - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4071.2ms, wake VFS transport dropped 19332.8ms -> 3624.3ms, and hot read was 118.6ms -> 167.7ms. - - Compared with read-ahead-only SQLITE-COLD-002: wake transport calls dropped 368 -> 70. - - Compared with SQLITE-COLD-014: wake transport calls stayed 70 -> 70, wake e2e improved 5371.1ms -> 4071.2ms, wake server improved 3946.5ms -> 3860.8ms, wake VFS transport improved 3704.7ms -> 3624.3ms, and hot read was 160.7ms -> 167.7ms. - - The benchmark still labels the shared VFS page-fetch metric as `get_pages`; after this story that counter includes range transport calls too. - - Verification status: `cargo check -p rivetkit-sqlite` passed; focused forward-scan/range tests passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed with existing Rust 2024 unsafe-operation warnings in `rivetkit-sqlite`. ---- -## 2026-04-29 01:04:03 PDT - SQLITE-COLD-016 -- What was implemented - - Changed sqlite-storage chunked logical value reads to reassemble large source blobs with one bounded chunk-prefix range read by default instead of serial 10 KB point gets. - - Added the central default-enabled `RIVETKIT_SQLITE_OPT_BATCH_CHUNK_READS` flag, with a disabled serial fallback for compatibility and benchmark comparisons. - - Added focused UDB tests for default range reassembly and disabled serial fallback, updated SQLite storage notes, rebuilt the engine, and reran the cold-read benchmark. -- Files changed - - `engine/packages/sqlite-storage/src/optimization_flags.rs` - - `engine/packages/sqlite-storage/src/udb.rs` + - `rivetkit-rust/packages/rivetkit-core/src/actor/metrics.rs` + - `rivetkit-rust/packages/rivetkit-core/tests/metrics.rs` + - `examples/kitchen-sink/scripts/sqlite-realworld-bench.ts` - `engine/packages/sqlite-storage/AGENTS.md` - - `engine/packages/sqlite-storage/CLAUDE.md` - - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-016.txt` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo check -p sqlite-storage` + - `cargo check -p rivetkit-sqlite` + - `cargo check -p rivetkit-core` + - `cargo check -p rivetkit-core --features sqlite` + - `cargo test -p sqlite-storage optimization_flags` + - `cargo test -p rivetkit-sqlite disabled_read_pool_routes_select_through_single_writer --lib` + - `cargo test -p rivetkit-core --features sqlite sqlite_read_pool_metrics_render` + - `timeout 240s cargo test -p rivetkit-sqlite` + - `pnpm --dir examples/kitchen-sink test` - **Learnings for future iterations:** - - SQLITE-COLD-016 benchmark numbers: insert e2e 15370.5ms, hot read e2e 159.9ms, wake read e2e 6248.5ms, wake read server 3955.7ms, wake overhead estimate 2292.7ms, wake VFS get_pages/range transport 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3706.7ms. - - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 6248.5ms, wake VFS transport dropped 19332.8ms -> 3706.7ms, and hot read was 118.6ms -> 159.9ms. - - Compared with SQLITE-COLD-015: VFS transport calls stayed 70 -> 70 because this story changes internal storage chunk reads rather than actor VFS page transport; wake e2e was 4071.2ms -> 6248.5ms due to higher local wake overhead, wake server was 3860.8ms -> 3955.7ms, VFS transport was 3624.3ms -> 3706.7ms, and hot read improved 167.7ms -> 159.9ms. - - Chunked UDB values keep the same metadata and 10 KB chunk write format; the read path now range-scans the physical chunk prefix with `limit = chunk_count` and validates expected chunk-key ordering. - - Verification status: `cargo check -p sqlite-storage` passed; focused chunked-value tests passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo build -p rivet-engine` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. + - The read pool is enabled by default to preserve prior native parallel-read behavior; disabled mode intentionally keeps one writer connection open and reports readonly statements as write fallbacks. + - Existing actor metrics already implement the SQLite VFS metrics trait, so read-pool internals can be exposed by extending that trait without adding a second metrics plumbing path. + - Idle reader TTL cleanup is lazy on read admission; there is no background timer for reader expiry. --- -## 2026-04-29 01:10:01 PDT - SQLITE-COLD-017 -- What was implemented - - Added a bounded decoded LTX cache inside `SqliteEngine`, gated by default-enabled `RIVETKIT_SQLITE_OPT_DECODED_LTX_CACHE`. - - Repeated reads of the same DELTA or SHARD source now reuse decoded pages across `get_pages` and `get_page_range` calls when the fetched blob bytes still match. - - Added focused storage tests for default cache reuse and disabled per-read decode fallback, updated SQLite storage notes, rebuilt the engine, and reran the cold-read benchmark. -- Files changed - - `engine/packages/sqlite-storage/src/engine.rs` - - `engine/packages/sqlite-storage/src/optimization_flags.rs` - - `engine/packages/sqlite-storage/src/read.rs` - - `engine/packages/sqlite-storage/AGENTS.md` - - `engine/packages/sqlite-storage/CLAUDE.md` - - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-017.txt` +## 2026-04-29 05:49:07 PDT - US-010 +- Implemented kitchen-sink SQLite real-world benchmark reporting for read-pool route and transition metrics, including routed reads, write fallbacks, mode transitions, reader opens, and reader closes in both console output and `summary.md`. +- Tightened the static benchmark test so the runner and actor workload catalogs remain in sync and read-pool metric reporting stays visible. +- Added a reusable examples agent note for kitchen-sink SQLite real-world benchmark catalog sync and summary reporting. +- Files changed: + - `examples/CLAUDE.md` + - `examples/kitchen-sink/scripts/sqlite-realworld-bench.ts` + - `examples/kitchen-sink/tests/sqlite-realworld-bench.test.ts` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `pnpm --dir examples/kitchen-sink test` + - `pnpm --dir examples/kitchen-sink exec tsx scripts/sqlite-realworld-bench.ts --help` + - `pnpm --dir examples/kitchen-sink exec biome check --formatter-enabled=false --assist-enabled=false scripts/sqlite-realworld-bench.ts tests/sqlite-realworld-bench.test.ts` + - `pnpm --dir examples/kitchen-sink run check-types` is the package-declared typecheck and currently prints `skipped - workflow history types broken`. + - Direct `tsc --noEmit` remains blocked by pre-existing kitchen-sink/server, Drizzle dependency, and workflow declaration errors outside this story. - **Learnings for future iterations:** - - SQLITE-COLD-017 benchmark numbers: insert e2e 15619.8ms, hot read e2e 157.9ms, wake read e2e 4067.4ms, wake read server 3834.2ms, wake overhead estimate 233.2ms, wake VFS get_pages/range transport 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3598.3ms. - - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4067.4ms, wake VFS transport dropped 19332.8ms -> 3598.3ms, and hot read was 118.6ms -> 157.9ms. - - Compared with SQLITE-COLD-016: VFS transport calls stayed 70 -> 70, wake e2e improved 6248.5ms -> 4067.4ms, wake server improved 3955.7ms -> 3834.2ms, VFS transport improved 3706.7ms -> 3598.3ms, and hot read improved 159.9ms -> 157.9ms. - - Cache entries compare the cached blob bytes before reuse, so same-key rewrites preserve byte-for-byte read behavior while still avoiding repeat LTX decodes for stable source blobs. - - Verification status: `cargo check -p sqlite-storage` passed; focused decoded-LTX cache tests passed; focused optimization flag parser test passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo build -p rivet-engine` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. + - `sqlite_read_pool_mode_transitions_total` is label-bearing, so benchmark metric parsing should sum all series for a metric family instead of taking the first sample. + - Scrape actor metrics once per workload and derive VFS plus read-pool snapshots from the same Prometheus text to keep reported counters comparable. + - The kitchen-sink package intentionally stubs `check-types`; use its static tests and a `tsx --help` smoke parse for benchmark-script-only changes unless the broader TypeScript config is repaired. --- -## 2026-04-29 01:15:48 PDT - SQLITE-COLD-018 -- What was implemented - - Added central startup preload policy config for preload byte budget, first-page preload enablement, and first-page count. - - Wired `OpenConfig::new` to use the central startup preload defaults and made page 1 count against the same preload byte budget as explicit pages/ranges and persisted hints. - - Added focused tests for disabling startup first pages, enforcing the byte budget, and defaulting/clamping numeric preload config. - - Updated SQLite storage notes, the optimization tracker, and reran the cold-read benchmark. -- Files changed - - `engine/packages/sqlite-storage/src/optimization_flags.rs` - - `engine/packages/sqlite-storage/src/open.rs` - - `engine/packages/sqlite-storage/AGENTS.md` - - `engine/packages/sqlite-storage/CLAUDE.md` - - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-018.txt` - - `scripts/ralph/prd.json` - - `scripts/ralph/progress.txt` -- **Learnings for future iterations:** - - SQLITE-COLD-018 benchmark numbers: insert e2e 15787.7ms, hot read e2e 170.4ms, wake read e2e 4113.6ms, wake read server 3880.7ms, wake overhead estimate 232.9ms, wake VFS get_pages/range transport 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3643.3ms. - - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4113.6ms, wake VFS transport dropped 19332.8ms -> 3643.3ms, and hot read was 118.6ms -> 170.4ms. - - Compared with SQLITE-COLD-017: wake transport calls stayed 70 -> 70, wake e2e was 4067.4ms -> 4113.6ms, wake server was 3834.2ms -> 3880.7ms, VFS transport was 3598.3ms -> 3643.3ms, and hot read was 157.9ms -> 170.4ms. - - Default startup preload policy is conservative: first pages enabled with count 1, persisted hints enabled, hot/early/scan hint mechanisms enabled, 1 MiB byte budget, and 8 MiB hard cap. - - The current persisted page hint schema has one pgnos list for hot and early page candidates, so either hot-page or early-page preload enablement includes that shared list; scan ranges are independently represented. - - Verification status: `cargo check -p sqlite-storage` passed; `cargo check -p pegboard-envoy` passed; `cargo check -p rivetkit-sqlite` passed with existing Rust 2024 unsafe-operation warnings; focused preload policy tests passed; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo build -p rivet-engine` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed. ---- -## 2026-04-29 01:24:04 PDT - SQLITE-COLD-019 -- What was implemented - - Added central VFS page cache policy config for cache capacity, fetched/prefetched/startup-preloaded cache classes, scan-resistant protection, and protected page budget. - - Wired `rivetkit-sqlite` `VfsConfig` to those central flags and added a bounded protected page cache for startup-preloaded pages, early target reads, and repeatedly accessed hot pages. - - Added focused VFS tests for disabled cache classes and for startup, early, and hot protected pages surviving scan churn. - - Updated SQLite optimization notes plus nearby sqlite-storage AGENTS/CLAUDE notes, rebuilt NAPI, and reran the cold-read benchmark. -- Files changed - - `engine/packages/sqlite-storage/src/optimization_flags.rs` - - `engine/packages/sqlite-storage/CLAUDE.md` (also read through `AGENTS.md` symlink) +## 2026-04-29 06:03:27 PDT - US-011 +- Added lifecycle and fencing stress coverage for native SQLite reader pools, including shutdown close ordering, reader fence mismatch fail-closed behavior, generation-specific VFS names, raw manual transaction write-mode retention, and shared routing gates for inspector/user operations. +- Fixed a manual transaction self-deadlock by routing work through the held writer while the manager is already in write mode. +- Files changed: + - `AGENTS.md` + - `rivetkit-rust/packages/rivetkit-sqlite/src/connection_manager.rs` + - `rivetkit-rust/packages/rivetkit-sqlite/src/database.rs` - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` - - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-019.txt` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo test -p rivetkit-sqlite native_database --lib` + - `cargo test -p rivetkit-sqlite connection_manager --lib` + - `cargo test -p rivetkit-sqlite actor_replacement_generation_uses_distinct_vfs_registration_name --lib` + - `cargo test -p rivetkit-sqlite --lib -- --test-threads=1` + - `cargo test -p rivetkit-sqlite` + - `cargo check -p rivetkit-sqlite` - **Learnings for future iterations:** - - SQLITE-COLD-019 benchmark numbers: insert e2e 15643.2ms, hot read e2e 183.2ms, wake read e2e 4146.1ms, wake read server 3928.7ms, wake overhead estimate 217.3ms, wake VFS get_pages/range transport 70 calls, fetched 13722 pages / 56205312 bytes, prefetch 13652 pages / 55918592 bytes, VFS transport 3679.0ms. - - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 70, wake e2e dropped 20141.0ms -> 4146.1ms, wake VFS transport dropped 19332.8ms -> 3679.0ms, and hot read was 118.6ms -> 183.2ms. - - Compared with SQLITE-COLD-018: wake transport calls stayed 70 -> 70, wake e2e was 4113.6ms -> 4146.1ms, wake server was 3880.7ms -> 3928.7ms, VFS transport was 3643.3ms -> 3679.0ms, and hot read was 170.4ms -> 183.2ms. - - The protected VFS cache is intentionally a bounded fallback alongside Moka: startup, early, and repeated hot target pages stay available even if long scan inserts churn the normal page cache. - - Verification status: `cargo check -p sqlite-storage` passed; `cargo check -p rivetkit-sqlite` passed with existing Rust 2024 unsafe-operation warnings; `cargo test -p sqlite-storage -- --test-threads=1` passed; `cargo test -p rivetkit-sqlite cache -- --nocapture` passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed with existing Rust 2024 unsafe-operation warnings; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed with existing warnings. + - If `NativeConnectionManager` holds an idle writer for a raw transaction, `NativeDatabaseHandle::execute` must bypass reader classification and reuse that writer for later statements such as `COMMIT`. + - Fence-mismatch tests need to clear the VFS page caches after setup so the stale reader is forced to fetch through the engine and observe the replacement generation. + - Native VFS registration tests can affect later tests because SQLite's VFS list is process-global; drop the stale registration before the replacement registration during cleanup. --- -## 2026-04-29 01:28:30 PDT - SQLITE-COLD-020 -- What was implemented - - Split the kitchen-sink SQLite cold-start benchmark into a cold wake/open phase and a separate cold full-read phase. - - Added `wakeSqlite`, a tiny SQLite action that opens/touches SQLite without scanning the 50 MiB payload. - - Removed the payload `LIKE '%gggggggg%'` probe from the main full-read path so read timing is not polluted by diagnostic CPU work. - - Recorded the required cold-read benchmark artifact. -- Files changed - - `examples/kitchen-sink/scripts/sqlite-cold-start-bench.ts` - - `examples/kitchen-sink/src/actors/testing/sqlite-cold-start-bench.ts` - - `examples/kitchen-sink/CLAUDE.md` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-020.txt` - - `scripts/ralph/prd.json` - - `scripts/ralph/progress.txt` -- **Learnings for future iterations:** - - SQLITE-COLD-020 benchmark numbers: insert e2e 16136.7ms, hot read e2e 160.4ms, cold wake/open e2e 294.2ms, cold wake/open server 44.2ms, wake read e2e 4119.2ms, wake read server 3944.2ms, wake overhead estimate 175.0ms, wake VFS get_pages/range transport 68 calls, fetched 13662 pages / 55959552 bytes, prefetch 13594 pages / 55681024 bytes, VFS transport 3734.1ms. - - Compared with baseline/SQLITE-COLD-001: wake transport calls dropped 1249 -> 68, wake e2e dropped 20141.0ms -> 4119.2ms, wake VFS transport dropped 19332.8ms -> 3734.1ms, and hot read was 118.6ms -> 160.4ms. - - Compared with SQLITE-COLD-019: wake transport calls dropped 70 -> 68, wake e2e improved 4146.1ms -> 4119.2ms, wake server was 3928.7ms -> 3944.2ms, VFS transport was 3679.0ms -> 3734.1ms, and hot read improved 183.2ms -> 160.4ms. - - Keep the cold wake/open phase separate from cold full-read throughput when changing this benchmark; the first phase should use a tiny SQLite touch and then sleep again before the full scan. - - Verification status: `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter kitchen-sink build` passed; full benchmark passed with `pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000`. ---- -## 2026-04-29 02:49:00 PDT - SQLITE-COLD-021 -- What was implemented - - Updated the kitchen-sink SQLite cold-start benchmark to run separate un-compacted and compacted-labelled scenarios by default, with `--scenario` for individual runs. - - Added per-scenario output for insert, hot read, cold wake/open, cold full-read, and VFS transport/cache metrics. - - Added LTX decoder compatibility for trailer and legacy no-trailer blobs, plus coverage for chunked shard reads through compaction. - - Recorded the required benchmark artifact at `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-021.txt`. -- Files changed - - `examples/kitchen-sink/scripts/sqlite-cold-start-bench.ts` - - `examples/kitchen-sink/CLAUDE.md` - - `engine/packages/sqlite-storage/src/ltx.rs` - - `engine/packages/sqlite-storage/src/compaction/shard.rs` - - `engine/packages/sqlite-storage/CLAUDE.md` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-021.txt` - - `scripts/ralph/prd.json` - - `scripts/ralph/progress.txt` -- **Learnings for future iterations:** - - SQLITE-COLD-021 un-compacted numbers: insert e2e 15048.4ms, hot read e2e 179.5ms, cold wake/open e2e 240.3ms, cold wake/open server 44.9ms, wake read e2e 4126.1ms, wake read server 3930.2ms, wake overhead estimate 195.9ms, wake VFS get_pages/range transport 68 calls, fetched 13662 pages / 55959552 bytes, prefetch 13594 pages / 55681024 bytes, VFS transport 3721.6ms. - - SQLITE-COLD-021 compacted-labelled control numbers: insert e2e 15689.5ms, hot read e2e 220.0ms, cold wake/open e2e 257.8ms, cold wake/open server 44.5ms, wake read e2e 4089.3ms, wake read server 3932.2ms, wake overhead estimate 157.1ms, wake VFS get_pages/range transport 68 calls, fetched 13662 pages / 55959552 bytes, prefetch 13594 pages / 55681024 bytes, VFS transport 3719.2ms. - - Compared with SQLITE-COLD-020, the un-compacted wake read stayed effectively flat at 4119.2ms -> 4126.1ms e2e and 3734.1ms -> 3721.6ms VFS transport; the compacted-labelled control was 4089.3ms e2e and 3719.2ms VFS transport. - - Actual background storage compaction and chunked DELTA benchmark attempts still hit local decode failures such as `unexpected end of varint`; the committed benchmark keeps both scenarios on inline 64 KiB transactions until that storage path is fixed explicitly. - - Verification status: `cargo test -p sqlite-storage -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter kitchen-sink build` passed; full benchmark passed with `pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --wake-delay-ms 10000`. ---- -## 2026-04-29 02:44:59 PDT - SQLITE-COLD-022 -- What was implemented - - Added bidirectional adaptive VFS scan detection with a new backward scan mode and reverse contiguous range-read selection. - - Kept reverse read-ahead bounded by requiring exact descending page runs, so scattered or overflow-backed reverse access falls back to target reads. - - Added a dedicated kitchen-sink reverse probe table and benchmark phase for descending rowid reads. - - Recorded the required benchmark artifact at `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-022.txt`. -- Files changed - - `rivetkit-rust/packages/rivetkit-sqlite/src/vfs.rs` - - `examples/kitchen-sink/src/actors/testing/sqlite-cold-start-bench.ts` - - `examples/kitchen-sink/scripts/sqlite-cold-start-bench.ts` - - `examples/kitchen-sink/CLAUDE.md` +## 2026-04-29 06:05:43 PDT - US-012 +- Documented the SQLite read-mode/write-mode connection manager invariant in internal VFS docs, including exclusive write mode, no reader/write overlap, and the native routing policy boundary. +- Moved the read-mode/write-mode manager tracker entry from recommended work into existing optimizations. +- Preserved the reusable invariant in the root agent notes for future SQLite changes. +- Files changed: + - `AGENTS.md` + - `docs-internal/engine/sqlite-vfs.md` - `docs-internal/engine/SQLITE_OPTIMIZATIONS.md` - - `.agent/notes/sqlite-cold-read-after-SQLITE-COLD-022.txt` - `scripts/ralph/prd.json` - `scripts/ralph/progress.txt` +- Checks: + - `cargo check -p rivetkit-sqlite` - **Learnings for future iterations:** - - SQLITE-COLD-022 un-compacted forward numbers: insert e2e 9248.8ms, hot read e2e 183.5ms, cold wake/open e2e 248.5ms, cold wake/open server 45.2ms, wake read e2e 4320.2ms, wake read server 4000.9ms, wake overhead estimate 319.3ms, wake VFS get_pages/range transport 68 calls, fetched 13733 pages / 56250368 bytes, prefetch 13665 pages / 55971840 bytes, VFS transport 3766.3ms. - - SQLITE-COLD-022 un-compacted reverse numbers: reverse wake read e2e 605.9ms, reverse wake read server 444.9ms, reverse wake overhead estimate 161.0ms, reverse wake VFS get_pages/range transport 14 calls, fetched 474 pages / 1941504 bytes, prefetch 460 pages / 1884160 bytes, VFS transport 323.7ms. - - SQLITE-COLD-022 compacted control numbers: forward wake read e2e 4155.4ms, forward wake read server 3969.6ms, forward VFS transport 3754.1ms over 68 calls; reverse wake read e2e 489.0ms, reverse wake read server 344.7ms, reverse VFS transport 262.6ms over 14 calls. - - Compared with SQLITE-COLD-021, forward full-read transport stayed effectively flat at 68 calls and 3721.6ms -> 3766.3ms, while the new reverse probe demonstrates bounded backward read-ahead without large-row overflow overfetch. - - Verification status: `cargo check -p rivetkit-sqlite` passed; `cargo test -p rivetkit-sqlite backward_scan -- --nocapture` passed; `cargo test -p rivetkit-sqlite -- --test-threads=1` passed; `pnpm --filter kitchen-sink check-types` passed with the known skip message; `pnpm -F rivetkit check-types` passed; `pnpm --filter kitchen-sink build` passed; `pnpm --filter @rivetkit/rivetkit-napi build:force` passed; un-compacted and compacted benchmark scenarios passed with `RIVET_TOKEN=dev pnpm --filter kitchen-sink exec tsx scripts/sqlite-cold-start-bench.ts --scenario --wake-delay-ms 10000`. + - Read-pool v1 intentionally avoids reader/writer overlap instead of pinning per-reader head txids or snapshots. + - Internal SQLite docs are the right home for cross-layer invariants; keep the optimization tracker limited to benchmark and performance status. + - Root `AGENTS.md` already has a SQLite Package section for short reusable constraints that should apply across future implementation work. ---