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https://dev.mysql.com/doc/refman/8.0/en/error-log-components.html
This section describes the characteristics of individual error log components. For general information about configuring error logging, see Section 7.4.2, “The Error Log”. A log component can be a filter or a sink: A filter processes log ...
https://dev.mysql.com/doc/refman/8.0/en/error-log-rule-based-filtering.html
The log_filter_dragnet log filter component enables log filtering based on user-defined rules. To enable the log_filter_dragnet filter, first load the filter component, then modify the log_error_services value. The following example enables ...
https://dev.mysql.com/doc/refman/8.0/en/events-configuration.html
Events are executed by a special event scheduler thread; when we refer to the Event Scheduler, we actually refer to this thread. When running, the event scheduler thread and its current state can be seen by users having the PROCESS privilege in the ...
https://dev.mysql.com/doc/refman/8.0/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/8.0/en/grant.html
[WITH GRANT OPTION] [AS user [WITH ROLE DEFAULT | NONE | ALL | ALL EXCEPT role [, role ] ... ] ] } GRANT PROXY ON user_or_role TO user_or_role [, user_or_role] ... These syntax restrictions apply: GRANT cannot mix granting both privileges and roles ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-frequently-asked-questions.html
What is the maximum number of MySQL servers in a group? A group can consist of maximum 9 servers. Attempting to add another server to a group with 9 members causes the request to join to be refused. This limit has been identified from testing and ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-performance-xcom-cache.html
The group communication engine for Group Replication (XCom, a Paxos variant) includes a cache for messages (and their metadata) exchanged between the group members as a part of the consensus protocol. Among other functions, the message cache is ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-requirements.html
Infrastructure Server Instance Configuration Server instances that you want to use for Group Replication must satisfy the following requirements. Transactions are executed optimistically and then, at commit time, are checked for conflicts. If there ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-restarting-group.html
Group Replication is designed to ensure that the database service is continuously available, even if some of the servers that form the group are currently unable to participate in it due to planned maintenance or unplanned issues. As long as the ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-secure-user.html
State transfer from the binary log requires a replication user with the correct permissions so that Group Replication can establish direct member-to-member replication channels. The same replication user is used for distributed recovery on all the ...