PostgreSQL Troubleshooting Guides

PostgreSQL errors can surface at the worst possible moments — during deployments, under peak traffic, or in the middle of critical operations. This collection of 4 troubleshooting guides covers the most common PostgreSQL issues encountered in database management, queries, and data operations. Each article walks through specific error messages with step-by-step diagnosis, root cause analysis, and verified solutions. Whether you're dealing with configuration problems, authentication failures, timeout errors, or unexpected behavior, these guides are designed to get you from error message to resolution as quickly as possible. Solutions are backed by official documentation and real-world production experience.

Error Quick Reference

Article	Description
ERROR: deadlock detected - Resolving PostgreSQL Deadlocks & Connection Exhaustion	Fix PostgreSQL deadlocks (ERROR: 40P01) and connection pool exhaustion. Learn to trace lock contention, enforce consistent lock ordering, and optimize transacti
PostgreSQL Deadlock Detected: Complete Troubleshooting Guide for ERROR: deadlock detected	Fix PostgreSQL 'ERROR: deadlock detected' fast. Diagnose with pg_locks, terminate blocking sessions, enforce lock ordering, and tune deadlock_timeout to prevent
PostgreSQL Troubleshooting: ERROR: deadlock detected	Comprehensive guide to resolving PostgreSQL 'ERROR: deadlock detected'. Learn how to diagnose lock contention, analyze logs, and implement strict locking orders
Resolving PostgreSQL Connection Refused on Port 5432 & Monitoring Replication Lag	Fix 'Connection refused' on PostgreSQL port 5432 (DBeaver, Java, Windows) by updating listen_addresses and pg_hba.conf. Plus, comprehensive replication lag moni