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Percona Software for MySQL Documentation

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Troubleshooting overview

Use this section when something goes wrong or you need to diagnose an issue with Percona Server for MySQL. The topics below point you to the right guide.

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Topics

Topic When to use it
Use PMM Advisors Run automated checks on your database settings and get recommendations.
Too many connections warning Diagnose and address connection limit messages in the log.
Handle corrupted tables React when InnoDB encounters a corrupted table without crashing the server.
Thread-based profiling Profile queries and understand where time is spent.
Stack trace Capture and interpret stack traces for debugging.
Core dumps (libcoredumper) Capture and analyze core dumps for crash diagnosis.

Troubleshooting by topic

These guides live under their topic sections but are useful when you are troubleshooting:

Topic Guide
SELinux Troubleshoot SELinux issues
AppArmor Troubleshoot AppArmor profiles
SQL Troubleshoot SQL code

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