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Fix "Too Many Connections" and Pool Exhaustion in Postgres

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Self-Hosting & Infra advanced 8 min read $0.01 Updated 2026-10-19

Diagnosing Postgres connection exhaustion: reading pg_stat_activity, finding leaks and idle-in-transaction sessions, setting timeouts, sizing application pools, using PgBouncer transaction pooling, and why raising max_connections is usually the wrong fix.

Postgres refuses new connections or the app hangs waiting for one from the pool. Find who holds the connections, stop leaks and idle-in-transaction sessions, and size the pool with a pooler instead of a bigger max_connections.

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#postgres#connection-pool#pgbouncer#database#performance

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