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https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-metric-sysschema-statementanalysis-total-executions-category.html
Table 6.39 Sys Schema Statement Analysis by Total Executions Metrics NameDescriptionAvg Latency The average wait time per timed occurrence of the statement. Avg Time of Execution The average time the statement takes to execute. Exec Count The total ... Lists the Sys Schema Statement Analysis by Total Executions metrics and provides a brief description of ...
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-metric-sysschema-statementanalysis-total-latency-category.html
Table 6.40 Sys Schema Statement Analysis by Total Latency Metrics NameDescriptionAvg Latency The average wait time per timed occurrence of the statement. Avg Time of Execution The average time the statement takes to execute. Exec Count The total ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-responses-failure-expel.html
You can use the group_replication_member_expel_timeout system variable to allow additional time between the creation of a suspicion and the expulsion of the suspect member. A group member is then expelled when another member's suspicion of it (or ...A suspicion is created when one server does not receive messages from another server, as explained in Section 20.1.4.2, “Failure ...
https://dev.mysql.com/doc/refman/8.4/en/sys-statement-analysis.html
total_latency The total wait time of timed occurrences of the statement. max_latency The maximum single wait time of timed occurrences of the statement. avg_latency The average wait time per timed occurrence of the statement. lock_latency The total ...The statement_analysis and x$statement_analysis views have these columns: query The normalized statement ...
https://dev.mysql.com/doc/connector-j/en/connector-j-other-changes.html
Instead of using a separate driver, you can now obtain a connection for a replication setup just by using the jdbc:mysql:replication:// scheme. serverTimezone is now an alias for the connection property connectionTimeZone, which has replaced ...
https://dev.mysql.com/doc/refman/8.4/en/controlling-query-plan-evaluation.html
Because the difference in performance between “good” and “bad” plans can be orders of magnitude (that is, seconds versus hours or even days), most query optimizers, including that of MySQL, perform a more or less exhaustive search for an ...
https://dev.mysql.com/doc/mysql-enterprise-backup/8.4/en/backup-special-options.html
--safe-replica-backup-timeout=SECONDS For a replication setup, the option specifies the time (in seconds) mysqlbackup will wait for Replica_open_temp_tables to become “0” (which happens when no temporary tables are open) to complete the backup ...This option is not compatible with the --no-locking option; using both options together will make mysqlbackup throw an ... These options are for backing up ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-wait-summary-tables.html
Example wait event summary information: mysql> SELECT * FROM performance_schema.events_waits_summary_global_by_event_name\G ... row *************************** EVENT_NAME: wait/synch/mutex/sql/BINARY_LOG::LOCK_index COUNT_STAR: 8 SUM_TIMER_WAIT: ...
https://dev.mysql.com/doc/ndbapi/en/mgm-structures.html
unsigned time: The time at which the log event was registered with the management server. int connect_count: The number of times this node has connected to or disconnected from the management server. int mysql_version: The MySQL version number, ...
https://dev.mysql.com/doc/ndbapi/en/ndb-ndb.html
An Ndb object consumes memory in proportion to the size of the largest operation performed over the lifetime of the object. This memory is held for the lifetime of the object, and once used in this way by the Ndb object, the only way to free this ...