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https://dev.mysql.com/doc/refman/5.7/en/performance-schema-miscellaneous-tables.html
The following sections describe tables that do not fall into the table categories discussed in the preceding sections: host_cache: Information from the internal host cache.
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-query-profiling.html
The following example demonstrates how to use Performance Schema statement events and stage events to retrieve data comparable to profiling information provided by SHOW PROFILES and SHOW PROFILE statements. The setup_actors table can be used to ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-quick-start.html
This section briefly introduces the Performance Schema with examples that show how to use it. For additional examples, see Section 25.19, “Using the Performance Schema to Diagnose Problems”. To enable or disable it explicitly, start the server ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-restrictions.html
The Performance Schema avoids using mutexes to collect or produce data, so there are no guarantees of consistency and results can sometimes be incorrect. If you save event information in another table, you should not assume that the original events ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-runtime-configuration.html
Specific Performance Schema features can be enabled at runtime to control which types of event collection occur. If you have the UPDATE privilege, you can change Performance Schema operation by modifying setup tables to affect how monitoring occurs. For additional details about these tables, see Section 25.12.2, “Performance Schema Setup ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-setup-objects-table.html
The setup_objects table controls whether the Performance Schema monitors particular objects. This table has a maximum size of 100 rows by default. To change the table size, modify the performance_schema_setup_objects_size system variable at server ...
https://dev.mysql.com/doc/refman/5.7/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 25.12.6, “Performance Schema Statement Event Tables” describes the events on which statement ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-statement-tables.html
Statement events occur at a high level of the event hierarchy. Within the event hierarchy, wait events nest within stage events, which nest within statement events, which nest within transaction events. These tables store statement events: ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-table-descriptions.html
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 similar tables contain current events at different levels of the event ...
https://dev.mysql.com/doc/refman/5.7/en/plugin-loading.html
Server plugins must be loaded into the server before they can be used. It is also possible to control the activation state of loaded plugins at startup, and to unload them at runtime. While a plugin is loaded, information about it is available as ...