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https://dev.mysql.com/doc/refman/5.7/en/performance-schema-table-handles-table.html
The Performance Schema exposes table lock information through the table_handles table to show the table locks currently in effect for each opened table handle. It is autosized by default; to configure the table size, set the ...This information ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-object-overview.html
This view summarizes the types of objects within each schema. count The number of objects in the schema of the given type. Note For MySQL instances with a large number of objects, this view might take a long time to execute. object_type The object ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-metrics-table.html
The INNODB_METRICS table provides a wide variety of InnoDB performance information, complementing the specific focus areas of the Performance Schema tables for InnoDB. Use the INFORMATION_SCHEMA COLUMNS table or the SHOW COLUMNS statement to view ...With simple queries, you can check the overall health of the ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-key-column-usage-table.html
CONSTRAINT_SCHEMA The name of the schema (database) to which the constraint belongs. TABLE_SCHEMA The name of the schema (database) to which the table belongs. REFERENCED_TABLE_SCHEMA The name of the schema (database) referenced by the constraint.
https://dev.mysql.com/doc/refman/5.7/en/information-schema-statistics-table.html
TABLE_SCHEMA The name of the schema (database) to which the table containing the index belongs. INDEX_SCHEMA The name of the schema (database) to which the index belongs. The MySQL column list is similar to what SQL Server 2000 returns for ...The ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-stages-history-long-table.html
The Performance Schema autosizes the value of N during server startup. To set the table size explicitly, set the performance_schema_events_stages_history_long_size system variable at server startup. For more information about the relationship ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-stages-history-table.html
The Performance Schema autosizes the value of N during server startup. To set the number of rows per thread explicitly, set the performance_schema_events_stages_history_size system variable at server startup. For more information about the ... The ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-statements-history-table.html
The Performance Schema autosizes the value of N during server startup. To set the number of rows per thread explicitly, set the performance_schema_events_statements_history_size system variable at server startup. For more information about the ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-transactions-history-long-table.html
The Performance Schema autosizes the value of N is autosized at server startup. To set the table size explicitly, set the performance_schema_events_transactions_history_long_size system variable at server startup. For more information about the ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-transactions-history-table.html
The Performance Schema autosizes the value of N during server startup. To set the number of rows per thread explicitly, set the performance_schema_events_transactions_history_size system variable at server startup. For more information about the ...