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https://dev.mysql.com/doc/refman/9.7/en/data-dictionary-object-cache.html
The dictionary object cache is a shared global cache that stores previously accessed data dictionary objects in memory to enable object reuse and minimize disk I/O. Similar to other cache mechanisms used by MySQL, the dictionary object cache uses ...
https://dev.mysql.com/doc/refman/9.7/en/datetime.html
This section describes their characteristics, how they are similar, and how they differ. MySQL recognizes DATE, DATETIME, and TIMESTAMP values in several formats, described in Section 11.1.3, “Date and Time Literals”. For the DATE and DATETIME ...
https://dev.mysql.com/doc/refman/9.7/en/error-access-denied.html
Often the problem is related to the MySQL accounts that the server permits client programs to use when connecting. See Section 8.2, “Access Control and Account Management”, and Section 8.2.22, “Troubleshooting Problems Connecting to MySQL”.
https://dev.mysql.com/doc/refman/9.7/en/example-auto-increment.html
You can also explicitly assign 0 to the column to generate sequence numbers, unless the NO_AUTO_VALUE_ON_ZERO SQL mode is enabled. For example: INSERT INTO animals (id,name) VALUES(0,'groundhog'); If the column is declared NOT NULL, it is also ...
https://dev.mysql.com/doc/refman/9.7/en/explain-output.html
The EXPLAIN statement provides information about how MySQL executes statements. EXPLAIN returns a row of information for each table used in the SELECT statement. It lists the tables in the output in the order that MySQL would read them while ...
https://dev.mysql.com/doc/refman/9.7/en/gis-class-multipolygon.html
A MultiPolygon is a MultiSurface object composed of Polygon elements. MultiPolygon Examples On a region map, a MultiPolygon could represent a system of lakes. MultiPolygon Assertions A MultiPolygon has no two Polygon elements with interiors that ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-bootstrap.html
The process of starting a group for the first time is called bootstrapping. The bootstrap should only be done by a single server, the one that starts the group and only once. This is why the value of the group_replication_bootstrap_group option was ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-change-primary.html
This section explains how to change which member of a single-primary group is the primary, using the group_replication_set_as_primary() function, which can be can be run on any member of the group. When this is done, the current primary becomes a ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-cloning.html
If you want to use remote cloning operations for distributed recovery in a group, you must set up existing members and joining members beforehand to support this function. If you do not want to use this function in a group, do not set it up, in ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-performance-xcom-cache-reduce.html
The minimum setting for the XCom message cache size in MySQL 9.7 is 128 MB, which enables deployment on a host that has a restricted amount of available memory. Having a very low group_replication_message_cache_size setting is not recommended if ...