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https://dev.mysql.com/doc/refman/8.0/en/sys-ps-setup-show-enabled.html
Displays all currently enabled Performance Schema configuration. Parameters in_show_instruments BOOLEAN: Whether to display enabled instruments. This might be a long list. in_show_threads BOOLEAN: Whether to display enabled threads. Example mysql> ...
https://dev.mysql.com/doc/refman/8.0/en/sys-ps-thread-stack.html
Returns a JSON formatted stack of all statements, stages, and events within the Performance Schema for a given thread ID. The value should match the THREAD_ID column from some Performance Schema threads table row. row *************************** ...
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-object-overview.html
This view summarizes the types of objects within each schema. Note For MySQL instances with a large number of objects, this view might take a long time to execute. object_type The object type: BASE TABLE, INDEX (index_type), EVENT, FUNCTION, ...
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-prerequisites.html
Before using the sys schema, the prerequisites described in this section must be satisfied. Because the sys schema provides an alternative means of accessing the Performance Schema, the Performance Schema must be enabled for the sys schema to work.
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-tables-with-full-table-scans.html
These views display which tables are being accessed with full table scans. The schema_tables_with_full_table_scans and x$schema_tables_with_full_table_scans views have these columns: object_schema The schema name. rows_full_scanned The total number ...
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-views.html
The sys schema contains many views that summarize Performance Schema tables in various ways. Most of these views come in pairs, such that one member of the pair has the same name as the other member, plus a x$ prefix. The view with the x$ prefix ...
https://dev.mysql.com/doc/refman/8.0/en/sys-statement-performance-analyzer.html
Creates a report of the statements running on the server. The views are calculated based on the overall and/or delta activity. This procedure disables binary logging during its execution by manipulating the session value of the sql_log_bin system ...
https://dev.mysql.com/doc/refman/8.0/en/sys-sys-config.html
This table contains sys schema configuration options, one row per option. Configuration changes made by updating this table persist across client sessions and server restarts. The sys_config table has these columns: variable The configuration ...
https://dev.mysql.com/doc/refman/8.0/en/temporary-table-problems.html
Temporary tables created with CREATE TEMPORARY TABLE have the following limitations: TEMPORARY tables are supported only by the InnoDB, MEMORY, MyISAM, and MERGE storage engines. Use ALTER TABLE instead: ALTER TABLE old_name RENAME new_name; You ...
https://dev.mysql.com/doc/refman/8.0/en/test-pluggable-authentication.html
MySQL includes a test plugin that checks account credentials and logs success or failure to the server error log. This is a loadable plugin (not built in) and must be installed prior to use. The test plugin source code is separate from the server ...