PostgreSQL Performance Tuning for SaaS Applications
Production-tested PostgreSQL optimization techniques that reduced P99 latency by 10x, covering indexing, query planning, and connection pooling.
PostgreSQL Performance Tuning for SaaS Applications
The 80/20 of Postgres Performance
1. Missing Indexes (fixes 50% of problems)
Always index:
- Foreign keys (Postgres does NOT auto-index these!)
- Columns in WHERE clauses
- Columns in JOIN conditions
- Columns in ORDER BY
Use partial indexes for status-filtered queries:
CREATE INDEX idx_active_orders ON orders(created_at) WHERE status = 'active';
2. Connection Pooling (fixes 20% of problems)
Postgres forks a process per conne