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https://dev.mysql.com/doc/refman/8.0/en/nonpersistible-system-variables.html
You must perform this step directly on the MySQL server host because persist_only_admin_x509_subject itself cannot be persisted at runtime. SET PERSIST and SET PERSIST_ONLY enable global system variables to be persisted to the mysqld-auto.cnf ...
https://dev.mysql.com/doc/refman/8.0/en/numeric-type-attributes.html
MySQL supports an extension for optionally specifying the display width of integer data types in parentheses following the base keyword for the type. If you store values larger than the display width in an integer column that has the ZEROFILL ...
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/replica-sql-thread-states.html
In MySQL 8.0.26, incompatible changes were made to instrumentation names, including the names of thread stages, containing the terms “master”, which is changed to “source”, “slave”, which is changed to “replica”, and “mts” (for ... The following list shows the most common states you may see in the State column for a replication SQL thread on a replica ...
https://dev.mysql.com/doc/refman/8.0/en/replication-howto-additionalslaves.html
The Event Scheduler is controlled by the event_scheduler system variable, which defaults to ON from MySQL 8.0, so events that are active on the original server run by default when the new replica starts up. As an alternative to creating a new ...
https://dev.mysql.com/doc/refman/8.0/en/sys-table-exists.html
Tests whether a given table exists as a regular table, a TEMPORARY table, or a view. If both a temporary and a permanent table exist with the given name, TEMPORARY is returned. Parameters in_db VARCHAR(64): The name of the database in which to ...
https://dev.mysql.com/doc/refman/8.0/en/table.html
TABLE is a DML statement introduced in MySQL 8.0.19 which returns rows and columns of the named table. Given the existence of a table named t, the following two statements produce identical output: TABLE t; SELECT * FROM t; You can order and limit ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-compression-tuning.html
Whether to adjust the size of the buffer pool based on run-time performance characteristics, such as the amount of time the system spends compressing and uncompressing data. If the system performs DML operations on compressed tables, and the way the ... Most often, the internal optimizations described in InnoDB Data Storage and Compression ensure that the system runs well with compressed ...
https://dev.mysql.com/doc/refman/8.0/en/sys-processlist.html
The MySQL process list indicates the operations currently being performed by the set of threads executing within the server. By default, rows are sorted by descending process time and descending wait time. time The time in seconds that the thread ...They provide more complete information than the SHOW PROCESSLIST statement and the INFORMATION_SCHEMA PROCESSLIST table, and are also ...
https://dev.mysql.com/doc/refman/8.0/en/monitor-innodb-mutex-waits-performance-schema.html
mysql> SELECT * FROM performance_schema.setup_instruments WHERE NAME LIKE '%wait/synch/mutex/innodb%'; +-------------------------------------------------------+---------+-------+ | NAME | ENABLED | TIMED | ... A mutex is a synchronization mechanism ...When two or more threads executing in the server need to access the same resource, the threads compete against each ...