Category
Fixing PostgreSQL errors, performance issues and configuration quirks.
This specific error means PostgreSQL has hit its max_connections limit for regular users, but is deliberately still reserving a small number of slots...
This error means the data you're importing contains byte sequences that aren't valid UTF-8 — Postgres, when configured with UTF-8 encoding (the common,...
This message means autovacuum backed off from a table because another session needed a conflicting lock — this is largely normal, expected behavior (autovacuum...
A CHECK constraint that seems to allow a NULL value through, despite the constraint's condition apparently not being satisfied by NULL, is actually correct,...
"Prepared statement does not exist" specifically under PgBouncer almost always comes down to a fundamental incompatibility between how prepared statements work...
A query that was fast before a large bulk insert but becomes slow immediately afterward almost always means PostgreSQL's query planner is working from outdated...
A slow query using a subquery inside IN can often be sped up significantly by rewriting it as EXISTS or a JOIN — while modern Postgres's planner is often smart...
A column that clearly exists but produces a "does not exist" error almost always comes down to PostgreSQL's specific case-folding rules for unquoted...
"Permission denied for schema public" appearing right after upgrading to PostgreSQL 15 isn't a bug or a misconfiguration you introduced — it's the direct,...