Update resources and limits for p23. (#1730)

Also cleaned up the section a bit to have a more clear difference between transaction and ledger limits.

Author: dmkozh

docs/networks/resource-limits-fees.mdx

@@ -11,39 +11,57 @@ Resource limitations and fees only apply to smart contract transactions. Read mo
 
 :::
 
-| Network Setting | Value |
-| --- | --- |
-| Soroban txn per ledger | 100 |
-| Max CPU instructions per txn | 100 million |
-| Memory limit per txn | 40 MB |
-| Individual ledger key size (contract storage key) | 250 bytes |
-| Individual ledger entry size (including Wasm entries) | 128 KiB |
-| Read/Write ledger entries per txn | 40 read; 25 write |
-| Read/Write bytes per txn | 200 KB read; 129 KiB write |
-| Transaction size | 129 KiB |
-| Persistent entry minimal/initial lifetime | 120 days |
-| Temporary entry minimal/initial lifetime | 1 day |
-| Max ledger entry expiration bump | 6 months |
-| Events+return value size bytes | 8 KB |
-| Max write bytes per ledger | 140 KiB |
-| Max txs size in bytes per ledger | 130 KiB |
-| Eviction scan size | 500 KB |
+### Per-transaction limits
+
+These define the maximum amount of work a single Smart contract transaction can do.
+
+| Network Setting                                       | Value              |
+| ----------------------------------------------------- | ------------------ |
+| Max CPU instructions                                  | 100 million        |
+| Max memory (RAM)                                      | 40 MB              |
+| Max number of keys in the footprint                   | 100                |
+| Disk reads\*                                          | 100 entries/200 KB |
+| Disk writes                                           | 50 entries/132 KB  |
+| Transaction size                                      | 132 KB             |
+| Events+return value size bytes                        | 16 KB              |
+| Individual ledger key size (contract storage key)     | 250 bytes          |
+| Individual ledger entry size (including Wasm entries) | 128 KiB            |
+
+\* Most transactions don't perform any disk reads, as only archived entries and 'classic' entries (G-accounts, trustlines) are considered to be disk reads. Live smart contract state is in-memory and is not counted towards this limit.
+
+### TTL extension parameters
+
+These define TTL extension parameters.
+
+| Persistent entry TTL on creation | 120 days | | Temporary entry TTL on creation | 1 day | | Max ledger entry TTL extension | 6 months |
+
+### Ledger-wide limits
+
+These define the maximum amount of work done by all the transactions in a single ledger (single block).
+
+| Network Setting                     | Value              |
+| ----------------------------------- | ------------------ |
+| Max CPU instructions                | 600 million        |
+| Max memory (RAM)                    | no explicit limit  |
+| Max number of keys in the footprint | no explicit limit  |
+| Disk reads                          | 1000 entries/7 MB  |
+| Disk writes                         | 500 entries/143 KB |
+| Transactions size                   | 133 KB             |
+| Events+return value size bytes      | no explicit limit  |
 
 ## Resource Fees
 
 | Network Setting                                | Cost (stroops)            |
 | :--------------------------------------------- | :------------------------ |
-| 10,000 instructions                            | 25 (250,000/max tx)       |
-| Read 1 ledger entry                            | 6,250 (250,000/max tx)    |
-| Write 1 ledger entry                           | 10,000 (250,000/max tx)   |
-| Read 1KB from ledger                           | 1,786 (250,000/max tx)    |
-| 1KB of transaction size (bandwidth)            | 1,624 (113,642/max tx)    |
-| 1KB of transaction size (history)              | 16,235 (1,136,418/max tx) |
-| 1KB of Events/return value                     | 10,000 (80,000/max tx)    |
-| Write 1KB to ledger                            | ~11,800 (826'000/max tx)  |
-| 30 days of rent for 1 KB of persistent storage | 0.29 XLM                  |
-| 30 days of rent for 1 KB of temporary storage  | 0.145 XLM                 |
-
-Note that the write fee normally fluctuates a bit (within 100 stroops/KB). However, if the ledger grows too quickly, the write fee will grow in a linear fashion with a steep slope.
-
-The ledger rent cost ('Write 1KB' entries in the table) is based on the write fee, rent period and some coefficient.
+| 10,000 CPU instructions                        | 25 (250,000/max tx)       |
+| Read 1 ledger entry from disk                  | 6,250 (625,000/max tx)    |
+| Read 1KB from disk                             | 1,786 (357,200/max tx)    |
+| Write 1 ledger entry                           | 10,000 (500,000/max tx)   |
+| Write 1KB to disk                              | 3,500 (462'000/max tx)    |
+| 1KB of transaction size (bandwidth)            | 1,624 (214,368/max tx)    |
+| 1KB of transaction size (history)              | 16,235 (2,143,020/max tx) |
+| 1KB of Events/return value                     | 10,000 (160,000/max tx)   |
+| 30 days of rent for 1 KB of persistent storage | ~427,000                  |
+| 30 days of rent for 1 KB of temporary storage  | ~213,500                  |
+
+Note, that the rent fees provided here may go up in case if a lot of contract data is written to the ledger within a short time period. This happens because the rent fees are designed in such a way that the closer the state size to some validator-defined threshold, the more expensive it gets to write new data or extend the TTLs.