Practical notes on PostgreSQL caching — pg_local_cache Measure the read path, understand invalidation, and make batch reads predictable. Field notes with SQL, trade-offs, and reproducible checks. https://profundium.github.io/pg_local_cache/blog/ 2026-09-22T00:00:00+00:00 pg_local_cache contributorshttps://github.com/profundium/pg_local_cache/graphs/contributors Batch PostgreSQL reads without losing order or missing keys https://profundium.github.io/pg_local_cache/blog/ordered-batch-reads/ 2026-09-22T00:00:00+00:00 2026-09-22T00:00:00+00:00 Replace N+1 primary-key queries while preserving duplicate IDs, input order, NULL positions and missing rows. Compare ANY, WITH ORDINALITY and SQL mget. When a PostgreSQL row cache helps: measure the whole read https://profundium.github.io/pg_local_cache/blog/measure-postgresql-row-cache/ 2026-09-22T00:00:00+00:00 2026-09-22T00:00:00+00:00 Design a fair PostgreSQL row-cache comparison using prepared SQL, SQL mget and RESP MGET. Separate warm reads, misses, batch sizes, writes and client costs. PostgreSQL cache invalidation: the late-fill race https://profundium.github.io/pg_local_cache/blog/cache-aside-late-fill/ 2026-09-22T00:00:00+00:00 2026-09-22T00:00:00+00:00 Walk through a cache-aside race where an old read refills a deleted key after commit. Understand publication fencing, snapshots, rollback and request-local caches.