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https://dev.mysql.com/doc/refman/5.7/en/partitioning-columns.html
The next two sections discuss COLUMNS partitioning, which are variants on RANGE and LIST partitioning. COLUMNS partitioning enables the use of multiple columns in partitioning keys. All of these columns are taken into account both for the purpose ...
https://dev.mysql.com/doc/refman/5.7/en/password-security-admin.html
Database administrators should use the following guidelines to keep passwords secure. MySQL stores passwords for user accounts in the mysql.user system table. Access to this table should never be granted to any nonadministrative accounts. Account ...
https://dev.mysql.com/doc/refman/5.7/en/password-too-long.html
This occurs when the library provided by the system to read passwords limits password values to a small number of characters (typically eight). That is a problem with the system library, not with MySQL. To work around it, change your MySQL password ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-cond-instances-table.html
The cond_instances table lists all the conditions seen by the Performance Schema while the server executes. A condition is a synchronization mechanism used in the code to signal that a specific event has happened, so that a thread waiting for this ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-memory-model.html
Memory used depends on the load actually seen, not the load estimated or explicitly configured for. As the Performance Schema collects data, memory is allocated in the corresponding buffer. The buffer size is unbounded, and may grow with the load.
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-replication-applier-configuration-table.html
This table shows the configuration parameters that affect transactions applied by the replica. Parameters stored in the table can be changed at runtime with the CHANGE MASTER TO statement, as indicated in the column descriptions. The ...
https://dev.mysql.com/doc/refman/5.7/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 ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-runtime-configuration.html
Specific Performance Schema features can be enabled at runtime to control which types of event collection occur. If you have the UPDATE privilege, you can change Performance Schema operation by modifying setup tables to affect how monitoring occurs. For additional details about these tables, see Section 25.12.2, “Performance Schema Setup ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-setup-consumers-table.html
For detailed information about the effect of enabling different consumers, see Section 25.4.7, “Pre-Filtering by Consumer”. If you disable a consumer, the server does not spend time adding event information to it.
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-setup-instruments-table.html
The setup_instruments table lists classes of instrumented objects for which events can be collected: mysql> SELECT * FROM performance_schema.setup_instruments; +---------------------------------------------------+---------+-------+ | NAME | ENABLED ...