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https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-index-cache-table.html
The INNODB_FT_INDEX_CACHE table provides token information about newly inserted rows in a FULLTEXT index. Before querying it, set the value of the innodb_ft_aux_table system variable to the name (including the database name) of the table that ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-deadlock-example.html
Client A enables innodb_print_all_deadlocks, creates two tables, 'Animals' and 'Birds', and inserts data into each. The following example illustrates how an error can occur when a lock request causes a deadlock. Thererfore, the previous read-only ...
https://dev.mysql.com/doc/refman/8.0/en/clone-plugin-remote.html
Use this option if you do not want to remove existing user-created data (schemas, tables, tablespaces) and binary logs from the recipient data directory. When the optional DATA DIRECTORY [=] 'clone_dir' clause is not used, a cloning operation ...The ... The clone plugin supports the following syntax for cloning remote data; that is, cloning data from a remote MySQL server instance (the donor) and transferring it to the MySQL instance where the cloning operation was initiated (the ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-key-column-usage-table.html
This table provides no information about functional key parts because they are expressions and the table provides information only about columns. The KEY_COLUMN_USAGE table has these columns: CONSTRAINT_CATALOG The name of the catalog to which the ...CONSTRAINT_SCHEMA The name of the schema (database) to which the constraint ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-events-table.html
The EVENTS table provides information about Event Manager events, which are discussed in Section 27.4, “Using the Event Scheduler”. The EVENTS table has these columns: EVENT_CATALOG The name of the catalog to which the event belongs. DEFINER ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-init-startup-configuration.html
System tablespace files are created in the data directory by default (datadir). For example, to create a system tablespace data file in a directory named myibdata, use this configuration: [mysqld] innodb_data_home_dir = /myibdata/ ...Note InnoDB ...
https://dev.mysql.com/doc/refman/8.0/en/myisam-maintenance-schedule.html
It is a good idea to perform table checks on a regular basis rather than waiting for problems to occur. One way to check and repair MyISAM tables is with the CHECK TABLE and REPAIR TABLE statements. It is also a good idea to enable automatic MyISAM ...The -s option (short for --silent) causes myisamchk to run in silent mode, printing messages only when errors ...
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-table-statistics.html
By default, rows are sorted by descending total wait time (tables with most contention first). The schema_table_statistics and x$schema_table_statistics views have these columns: table_schema The schema that contains the table. total_latency The ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-undo-tablespaces.html
Default undo tablespaces are created at initialization time to provide a location for rollback segments that must exist before SQL statements can be accepted. Default undo tablespaces are created in the location defined by the innodb_undo_directory ... Undo tablespaces contain undo logs, which are collections of records containing information about how to undo the latest change by a transaction to a clustered index ...
https://dev.mysql.com/doc/refman/8.0/en/plugin-loading.html
For example, if the plugin implements a storage engine, existing tables for the storage engine become inaccessible, and attempts to create new tables for the storage engine result in tables that use the default storage engine unless the ...Built-in ... Server plugins must be loaded into the server before they can be ...