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https://dev.mysql.com/doc/refman/8.0/en/information-schema-tp-thread-group-state-table.html
Note As of MySQL 8.0.14, the thread pool INFORMATION_SCHEMA tables are also available as Performance Schema tables. (See Section 29.12.16, “Performance Schema Thread Pool Tables”.) The INFORMATION_SCHEMA tables are deprecated; expect them to be ...Each row provides information about the current state of a ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-tp-thread-group-stats-table.html
Note As of MySQL 8.0.14, the thread pool INFORMATION_SCHEMA tables are also available as Performance Schema tables. (See Section 29.12.16, “Performance Schema Thread Pool Tables”.) The INFORMATION_SCHEMA tables are deprecated; expect them to be ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-stages-history-table.html
The events_stages_history table contains the N most recent stage events that have ended per thread. Stage events are not added to the table until they have ended. When the table contains the maximum number of rows for a given thread, the oldest ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-statements-history-table.html
The events_statements_history table contains the N most recent statement events that have ended per thread. Statement events are not added to the table until they have ended. When the table contains the maximum number of rows for a given thread, ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-transactions-history-table.html
The events_transactions_history table contains the N most recent transaction events that have ended per thread. Transaction events are not added to the table until they have ended. When the table contains the maximum number of rows for a given ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-waits-history-table.html
The events_waits_history table contains the N most recent wait events that have ended per thread. Wait events are not added to the table until they have ended. When the table contains the maximum number of rows for a given thread, the oldest thread ...The Performance Schema autosizes the value of N during server ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-objects-summary-global-by-type-table.html
The Performance Schema maintains the objects_summary_global_by_type table for aggregating object wait events. row *************************** OBJECT_TYPE: TABLE OBJECT_SCHEMA: test OBJECT_NAME: t COUNT_STAR: 3 SUM_TIMER_WAIT: 263126976 ...Example ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-applier-status-table.html
This table shows the current general transaction execution status on the replica. The table provides information about general aspects of transaction applier status that are not specific to any thread involved. Thread-specific status information is ...There is always a default replication channel, and more replication channels can be ...
https://dev.mysql.com/doc/refman/8.0/en/replica-logs-status.html
Before MySQL 8.0, to create the replication metadata repositories as tables, it was necessary to specify master_info_repository=TABLE and relay_log_info_repository=TABLE at server startup. From MySQL 8.0, creating the replication metadata ... A ...
https://dev.mysql.com/doc/refman/8.0/en/switchable-optimizations.html
For more information, see Section 10.2.2.5, “Derived Condition Pushdown Optimization” Derived Table Merging Flags derived_merge (default on) Controls merging of derived tables and views into outer query block. The derived_merge flag controls ...