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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/explain.html
The SHOW CREATE TABLE, SHOW TABLE STATUS, and SHOW INDEX statements also provide information about tables. {EXPLAIN | DESCRIBE | DESC} tbl_name [col_name | wild] {EXPLAIN | DESCRIBE | DESC} [explain_type] {explainable_stmt | FOR CONNECTION ...The ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-thread-pool-tables.html
If the thread pool plugin is loaded but disabled, the tables are not created. Note The Performance Schema tables described here are available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA tables instead; see ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-info.html
Methods of obtaining such information include the following: Using the SHOW CREATE TABLE statement to view the partitioning clauses used in creating a partitioned table. A new row event is created for a modification that takes place in a different ...Using the SHOW TABLE STATUS statement to determine whether a table is ... This section discusses obtaining ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-queries-myisam.html
Some general tips for speeding up queries on MyISAM tables: To help MySQL better optimize queries, use ANALYZE TABLE or run myisamchk --analyze on a table after it has been loaded with data. (For unique indexes, this is always 1.) MySQL uses this ...This updates a value for each index part that indicates the average number of rows that have the same ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-bulk-data-loading.html
COMMIT; The mysqldump option --opt creates dump files that are fast to import into an InnoDB table, even without wrapping them with the SET autocommit and COMMIT statements. For optimal performance when loading data into an InnoDB FULLTEXT index, ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-limitations-storage-engines.html
This means that partitioned tables cannot be created using any other storage engine than these. (You must be using MySQL NDB Cluster with the NDB storage engine to create NDB tables.) InnoDB storage engine. It is not possible under normal ... In ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-processlist-table.html
As such, the implementation of SHOW PROCESSLIST which uses this table is also deprecated. For a comparison of this table with other sources, see Sources of Process Information. This is the same value displayed in the Id column of the SHOW ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-javascript-table-delete.html
You can use the delete() method to remove some or all records from a table in a database. All records matching the condition are deleted from the city table. mysql-js> db.city.delete().where("Name = 'Olympia'") Delete the First Record To delete the ...The X DevAPI provides additional methods to use with the delete() method to filter and order the records to be ...