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Database
This is part 2 of a series about Postgres logical replication use-cases, and about how the feature set has evolved over the past ten years and ten releases, one architecture at a time. Part 1 built a hub-and-workers system for write…
The `notify_buffers` GUC tunes a 128kB cache for PostgreSQL's LISTEN/NOTIFY queue—and almost never matters. (I consult on PostgreSQL through PGX Inc..)
Two EXPLAIN ANALYZE runs on statistically identical data produced opposite plans, 73 heap blocks against 3,449. The margin was 1.5%. Here's the mechanism, measured with ExoBench, and the index shape that takes the coin out of the planner's…
My tool tells you things like “this index cuts the query’s cost by 91%”. Before releasing it, I wanted to know what that number is actually worth. The tool is PgLens, a Postgres index advisor I’m building. Like several other advisors, it…