Getting the “too many connections” error in PostgreSQL? You’ve hit the database’s max_connections limit — and it’s one of the most common issues developers run into as traffic grows.
In this guide, we’ll reproduce the error on a local PostgreSQL setup using a simple Python script, then walk through practical fixes: from closing unused connections to setting up connection pooling and monitoring active sessions with pg_stat_activity. By the end, you’ll know exactly why this error happens, and how to stop it from recurring.
What are database connections, and what happens when there are too many?
Database connections are essential