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MySQL Globalization
MySQL Information Schema
MySQL Installation Guide
Security in MySQL
Starting and Stopping MySQL
MySQL and Linux/Unix
MySQL and Windows
MySQL and macOS
MySQL and Solaris
Building MySQL from Source
MySQL Restrictions and Limitations
MySQL Partitioning
MySQL Tutorial
MySQL Performance Schema
MySQL Replication
Using the MySQL Yum Repository
MySQL NDB Cluster 8.0
Instance tables document what types of objects are instrumented. They provide event names and explanatory notes or status information:
cond_instances: Condition synchronization object instancesfile_instances: File instancesmutex_instances: Mutex synchronization object instancesrwlock_instances: Lock synchronization object instancessocket_instances: Active connection instances
These tables list instrumented synchronization objects, files, and connections. There are three types of synchronization objects:cond,mutex, andrwlock. Each instance table has anEVENT_NAME orNAME column to indicate the instrument associated with each row. Instrument names may have multiple parts and form a hierarchy, as discussed inSection 29.6, “Performance Schema Instrument Naming Conventions”.
Themutex_instances.LOCKED_BY_THREAD_ID andrwlock_instances.WRITE_LOCKED_BY_THREAD_ID columns are extremely important for investigating performance bottlenecks or deadlocks. For examples of how to use them for this purpose, seeSection 29.19, “Using the Performance Schema to Diagnose Problems”
PDF (A4) - 43.4Mb
Man Pages (TGZ) - 297.2Kb
Man Pages (Zip) - 402.4Kb
Info (Gzip) - 4.3Mb
Info (Zip) - 4.3Mb
MySQL Globalization
MySQL Information Schema
MySQL Installation Guide
Security in MySQL
Starting and Stopping MySQL
MySQL and Linux/Unix
MySQL and Windows
MySQL and macOS
MySQL and Solaris
Building MySQL from Source
MySQL Restrictions and Limitations
MySQL Partitioning
MySQL Tutorial
MySQL Performance Schema
MySQL Replication
Using the MySQL Yum Repository
MySQL NDB Cluster 8.0