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https://dev.mysql.com/doc/refman/8.0/en/sys-host-summary-by-statement-type.html
total_latency The total wait time of timed occurrences of the statement event for the host. max_latency The maximum single wait time of timed occurrences of the statement event for the host. lock_latency The total time waiting for locks by timed ...
https://dev.mysql.com/doc/refman/8.0/en/sys-user-summary-by-statement-latency.html
total_latency The total wait time of timed statements for the user. max_latency The maximum single wait time of timed statements for the user. lock_latency The total time waiting for locks by timed statements for the user. The ...
https://dev.mysql.com/doc/refman/8.0/en/sys-user-summary-by-statement-type.html
total_latency The total wait time of timed occurrences of the statement event for the user. max_latency The maximum single wait time of timed occurrences of the statement event for the user. lock_latency The total time waiting for locks by timed ...
https://dev.mysql.com/doc/refman/8.0/en/system-schema.html
Data Dictionary Tables Grant System Tables Object Information System Tables Log System Tables Server-Side Help System Tables Time Zone System Tables Replication System Tables Optimizer System Tables Miscellaneous System Tables The remainder of this ...It contains tables that store information required by the MySQL server as it ...
https://dev.mysql.com/doc/refman/8.0/en/with.html
A common table expression (CTE) is a named temporary result set that exists within the scope of a single statement and that can be referred to later within that statement, possibly multiple times. As a development technique to guard against a ...
https://dev.mysql.com/doc/refman/8.0/en/change-replication-source-to.html
SOURCE_CONNECT_RETRY = interval Specifies the interval in seconds between the reconnection attempts that the replica makes after the connection to the source times out. Suitable values are SOURCE_RETRY_COUNT=3 and SOURCE_CONNECT_RETRY=10, which make ...] CHANGE REPLICATION SOURCE TO changes the parameters that the replica server uses for connecting to the source and reading data from the ...
https://dev.mysql.com/doc/refman/8.0/en/clone-plugin-failure-handling.html
If the cloning operation is unable to obtain a DDL lock within the time limit specified by the clone_ddl_timeout variable, an error is reported. Any time during the execution of a cloning operation or after a failure, the server is always in a ...
https://dev.mysql.com/doc/refman/8.0/en/error-log-format.html
2020-08-06T14:25:03.109022Z 5 [Note] [MY-010051] [Server] Event Scheduler: scheduler thread started with id 5 Traditional-format messages have these fields: time thread [label] [err_code] [subsystem] msg The [ and ] square bracket characters are ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-configuring-instances.html
Warning When joining multiple servers at the same time, make sure that they point to seed members that are already in the group. Creating a group and joining multiple members at the same time is not supported. It might work, but chances are that the ... This section explains the configuration settings required for MySQL Server instances that you want to use for Group ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-group-membership.html
The group is dynamic and servers can leave (either voluntarily or involuntarily) and join it at any time. Every server in the group has a consistent view of which servers are the members participating actively in the group at a given moment in time.