MySQL 5.6 Reference Manual Including MySQL NDB Cluster 7.3-7.4 Reference Guide

Chapter 22 MySQL Performance Schema

The MySQL Performance Schema is a feature for monitoring MySQL Server execution at a low level. The Performance Schema has these characteristics:

The Performance Schema is intended to provide access to useful information about server execution while having minimal impact on server performance. The implementation follows these design goals:


The MySQL sys schema is a set of objects that provides convenient access to data collected by the Performance Schema. In MySQL 5.7, the sys schema is installed by default. For MySQL 5.6, you can obtain it from the schema development website at For usage instructions, see MySQL sys Schema.