foreign-keys

Foreign key constraints and performance impacts

Databases Why PostgreSQL INSERT Slow on Empty Tables with FKs

PostgreSQL INSERTs slow on empty tables with foreign keys due to planner stats (reltuples=0) causing seq scans. Seeding 1 row or ON CONFLICT fixes it. Best practices for bulk inserts, ANALYZE, libpq sync.

#bulk-insert
#foreign-keys
#libpq
#performance
#postgresql
#query-planner

1 answer• 1 view

02/02/2026, 04:04 PM