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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-lock-tables.html
The Performance Schema exposes lock information through these tables: data_locks: Data locks held and requested data_lock_waits: Relationships between data lock owners and data lock requestors blocked by those owners metadata_locks: Metadata locks ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-ndb-sync-excluded-objects-table.html
This table provides information about NDB database objects which cannot be automatically synchronized between NDB Cluster's dictionary and the MySQL data dictionary. Example information about NDB database objects which cannot be synchronized with ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-pre-filtering.html
Pre-filtering is done by the Performance Schema and has a global effect that applies to all users. setup_objects controls whether the Performance Schema monitors particular table and stored program objects. Events already collected remain in the ...
https://dev.mysql.com/doc/refman/8.0/en/perror.html
For example, for the ER_WRONG_VALUE_FOR_VAR error, perror understands any of these arguments: 1231, 001231, MY-1231, or MY-001231, or ER_WRONG_VALUE_FOR_VAR. perror displays the error message for MySQL or operating system error codes. The meaning ...
https://dev.mysql.com/doc/refman/8.0/en/reloading-sql-format-dumps.html
To reload a dump file written by mysqldump that consists of SQL statements, use it as input to the mysql client.
https://dev.mysql.com/doc/refman/8.0/en/replication-features-current-user.html
In some cases, such as statements that change passwords, the function reference is expanded before it is written to the binary log, so that the statement includes the user name. For all other cases, the name of the current user on the source is ...
https://dev.mysql.com/doc/refman/8.0/en/replication-multi-source-adding-gtid-master.html
These steps assume you have enabled GTIDs for transactions on the sources using gtid_mode=ON, created a replication user, ensured that the replica is using TABLE based replication applier metadata repositories, and provisioned the replica with data ...Use the CHANGE REPLICATION SOURCE TO statement (from MySQL 8.0.23) or CHANGE MASTER TO statement (before MySQL 8.0.23) to configure a replication channel for each source on the replica (see Section 19.2.2, “Replication ...
https://dev.mysql.com/doc/refman/8.0/en/restart.html
One use for RESTART is when it is not possible or convenient to gain command-line access to the MySQL server on the server host to restart it. For example, SET PERSIST_ONLY can be used at runtime to make configuration changes to system variables ...
https://dev.mysql.com/doc/refman/8.0/en/rewriter-query-rewrite-plugin-installation.html
To install or uninstall the Rewriter query rewrite plugin, choose the appropriate script located in the share directory of your MySQL installation: install_rewriter.sql: Choose this script to install the Rewriter plugin and its associated elements.
https://dev.mysql.com/doc/refman/8.0/en/role-names.html
Role names have syntax and semantics similar to account names; see Section 8.2.4, “Specifying Account Names”. It is possible for a row in the mysql.user system table to serve as both an account and a role. For this reason, role names are often ... MySQL role names refer to roles, which are named collections of ...