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https://dev.mysql.com/doc/refman/8.4/en/myisam-table-maintenance.html
This section discusses how to use myisamchk to check or repair MyISAM tables (tables that have .MYD and .MYI files for storing data and indexes). For general myisamchk background, see Section 6.6.4, “myisamchk — MyISAM Table-Maintenance ...
https://dev.mysql.com/doc/refman/8.4/en/show-open-tables.html
SHOW OPEN TABLES [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr] SHOW OPEN TABLES lists the non-TEMPORARY tables that are currently open in the table cache. The FROM clause, if present, restricts the tables shown to those present in the db_name ...The WHERE clause can be given to select rows using more general conditions, as discussed in Section 28.8, “Extensions to SHOW ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-memory-summary-tables.html
Memory summary tables do not contain timing information because memory events are not timed. Example memory event summary information: mysql> SELECT * FROM performance_schema.memory_summary_global_by_event_name WHERE EVENT_NAME = ...Operation counts ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-stage-summary-tables.html
The Performance Schema maintains tables for collecting current and recent stage events, and aggregates that information in summary tables. Section 29.12.5, “Performance Schema Stage Event Tables” describes the events on which stage summaries ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-transaction-summary-tables.html
The Performance Schema maintains tables for collecting current and recent transaction events, and aggregates that information in summary tables. Section 29.12.7, “Performance Schema Transaction Tables” describes the events on which transaction ...Example transaction event summary information: mysql> SELECT * FROM performance_schema.events_transactions_summary_global_by_event_name LIMIT 1\G *************************** ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-processlist-table.html
For a comparison of this table with other sources, see Sources of Process Information. Note If the performance_schema_show_processlist system variable is enabled, the processlist table also serves as the basis for an alternative implementation ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-innodb-cmp-per-index-table.html
The INNODB_CMP_PER_INDEX and INNODB_CMP_PER_INDEX_RESET tables provide status information on operations related to compressed InnoDB tables and indexes, with separate statistics for each combination of database, table, and index, to help you ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-innodb-ft-being-deleted-table.html
The INNODB_FT_BEING_DELETED table provides a snapshot of the INNODB_FT_DELETED table; it is used only during an OPTIMIZE TABLE maintenance operation. When OPTIMIZE TABLE is run, the INNODB_FT_BEING_DELETED table is emptied, and DOC_ID values are ...
https://dev.mysql.com/doc/refman/8.4/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 ...An ...
https://dev.mysql.com/doc/workbench/en/wb-using-table-tool.html
Tables can also be added to an EER Diagram using the table tool on the vertical toolbar. Make sure that the EER Diagram tab is selected, then right-click the table icon on the vertical toolbar. Clicking the mouse on this icon changes the mouse ...