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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-startup-configuration.html
Note With the Performance Schema enabled, the number of Performance Schema instances affects the server memory footprint, perhaps to a large extent. To use the MySQL Performance Schema, it must be enabled at server startup to enable event ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-statement-summary-tables.html
The Performance Schema maintains tables for collecting current and recent statement events, and aggregates that information in summary tables. Section 29.12.6, “Performance Schema Statement Event Tables” describes the events on which statement ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-summary-tables.html
Exceptions to this truncation behavior are noted in individual summary table sections. Summary tables provide aggregated information for terminated events over time. The tables in this group summarize event data in different ways. Each summary ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-table-characteristics.html
Exceptions to this truncation behavior are noted in individual summary table sections. The name of the performance_schema database is lowercase, as are the names of tables within it. Many tables in the performance_schema database are read only and ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-table-descriptions.html
These tables provide event names and explanatory notes or status information. Tables in the performance_schema database can be grouped as follows: Setup tables. The events_waits_current table contains the most recent event for each thread. Other ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-thread-pool-tables.html
Note The Performance Schema tables described here are available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA tables instead; see Section 28.5, “INFORMATION_SCHEMA Thread Pool Tables”. The following ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tp-thread-group-state-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA table instead; see Section 28.5.2, “The INFORMATION_SCHEMA TP_THREAD_GROUP_STATE Table”. The ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tp-thread-group-stats-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA table instead; see Section 28.5.3, “The INFORMATION_SCHEMA TP_THREAD_GROUP_STATS Table”. The ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tp-thread-state-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA table instead; see Section 28.5.4, “The INFORMATION_SCHEMA TP_THREAD_STATE Table”. The ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-user-defined-functions-table.html
Note The name of the user_defined_functions table stems from the terminology used at its inception for the type of function now known as a loadable function (that is, user-defined function, or UDF). The user_defined_functions table contains a row ...