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https://dev.mysql.com/doc/refman/5.7/en/group-replication-find-primary.html
The following example shows how to find out which server is currently the primary when deployed in single-primary mode.
https://dev.mysql.com/doc/refman/5.7/en/create-event.html
CREATE [DEFINER = user] EVENT [IF NOT EXISTS] event_name ON SCHEDULE schedule [ON COMPLETION [NOT] PRESERVE] [ENABLE | DISABLE | DISABLE ON SLAVE] [COMMENT 'string'] DO event_body; schedule: { AT timestamp [+ INTERVAL interval] ... The event does ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-threads-table.html
The threads table contains a row for each server thread. Each row contains information about a thread and indicates whether monitoring and historical event logging are enabled for it: mysql> SELECT * FROM performance_schema.threads\G ...
https://dev.mysql.com/doc/refman/5.7/en/version-tokens-usage.html
An administrative or management application that communicates with the servers and organizes them into high-availability groups. Groups serve different purposes, and servers within each group may have different assignments. Assignment of a server ...
https://dev.mysql.com/doc/refman/5.7/en/problems-with-alias.html
An alias can be used in a query select list to give a column a different name. This restriction is imposed because when the WHERE clause is evaluated, the column value may not yet have been determined. In the select list of a query, a quoted column ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-overview.html
See the documentation for the DataMemory data node configuration parameter, as well as Section 21.2.2, “NDB Cluster Nodes, Node Groups, Fragment Replicas, and Partitions”, for more information. This section provides a conceptual overview of ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-config-example.html
To support NDB Cluster, you must to update my.cnf as shown in the following example. You may also specify these parameters on the command line when invoking the executables. Note The options shown here should not be confused with those that are ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-timing.html
Events are collected by means of instrumentation added to the server source code. Instruments time events, which is how the Performance Schema provides an idea of how long events take. It is also possible to configure instruments not to collect ...
https://dev.mysql.com/doc/refman/5.7/en/sha256-pluggable-authentication.html
MySQL provides two authentication plugins that implement SHA-256 hashing for user account passwords: sha256_password: Implements basic SHA-256 authentication. caching_sha2_password: Implements SHA-256 authentication (like sha256_password), but uses ...
https://dev.mysql.com/doc/refman/5.7/en/show-engine.html
SHOW ENGINE engine_name {STATUS | MUTEX} SHOW ENGINE displays operational information about a storage engine. The statement has these variants: SHOW ENGINE INNODB STATUS SHOW ENGINE INNODB MUTEX SHOW ENGINE PERFORMANCE_SCHEMA STATUS SHOW ENGINE ...