The Postgres Developer's Guide to Vector Index Tradeoffs (opens in new tab)

title: "The Postgres Developer's Guide to Vector Index Tradeoffs" published: true date: 2026-05-26 14:23:55 UTC tags: pgtextsearch,PostgreSQL,PostgreSQLExtensions canonical_url: cover_image: Vector search in Postgres usually starts simply. You add an embedding column, run a nearest-neighbor query, and order by distance. SELECT content FROM documents ORDER BY embedding '[0.1, 0.2, ...]' LIMIT 10; For a while, that is enough. That simplicity breaks down as the workload becomes real. The tab...