MariaDB Troubleshooting Guides

MariaDB errors can surface at the worst possible moments — during deployments, under peak traffic, or in the middle of critical operations. This collection of 3 troubleshooting guides covers the most common MariaDB 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
How to Enable the Slow Query Log in MariaDB: Fixing 'long_query_time' and Logging Issues	Learn how to properly enable the MariaDB slow query log, configure long_query_time dynamically, and troubleshoot when MariaDB slow queries are not logging.
MariaDB Crash Recovery: Diagnosing OOM, Disk Full, and InnoDB Corruption	Comprehensive SRE guide to MariaDB crash recovery. Learn how to fix out of memory (OOM) kills, disk full errors, deadlocks, and 'too many connections' to restor
MariaDB Crash Recovery: Fixing "InnoDB: Operating system error", OOM Kills, and Connection Limits	Comprehensive guide to MariaDB crash recovery. Learn how to fix InnoDB corruption, OOM killer terminations, connection limits, and replication lag.