perf(jdbc): add key_subscriptions(subscription_id) index for ApiKey appender warmup (APIM-14263)#17323
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aditya-goyal01
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Fixes APIM-14263.
What
Adds a JDBC index
key_subscriptions(subscription_id)(Liquibasev4_11_8/05_…; additive — keeps the existing PK).Why
The gateway-sync ApiKey appender (APIM-14203) loads keys via
select … from keys where id in (select key_id from key_subscriptions where subscription_id in (…chunk…)).key_subscriptions's only index is the PK(key_id, subscription_id)— leading columnkey_id— sowhere subscription_id in (…)cannot use it and Postgres does a Parallel Seq Scan per chunk.At ~2.4M subs / ~800k
key_subscriptionsrows this is ~2.3 s/chunk (EXPLAIN ANALYZE); over thousands of chunks the real-gateway warmup hung >30 min with 0/8109 APIs deployed. The same dataset with no api-keys warms up in ~80 s.Mongo parity
MongoDB already has the equivalent —
keys.{subscriptions:1}(KeysSubscriptionsIndexUpgrader, names1). This PR closes the JDBC↔Mongo parity gap; no Mongo change needed.Notes
(plan,id)index (APIM-14087) already on4.11.x.