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https://dev.mysql.com/doc/refman/8.4/en/sys-statement-analysis.html
The statement_analysis and x$statement_analysis views have these columns: query The normalized statement string. db The default database for the statement, or NULL if there is none. full_scan The total number of full table scans performed by ...
https://dev.mysql.com/doc/refman/8.4/en/sys-user-summary-by-statement-latency.html
The user_summary_by_statement_latency and x$user_summary_by_statement_latency views have these columns: user The client user name. Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background ...
https://dev.mysql.com/doc/refman/8.4/en/telemetry-metrics-meters.html
For example, to update the frequency of the mysql.inno metrics: mysql>update performance_schema.setup_meters set FREQUENCY='30' where name = 'mysql.inno'; The maximum number of meter instruments which can be created is set by ...
https://dev.mysql.com/doc/refman/8.4/en/thread-commands.html
A thread can have any of the following Command values: Binlog Dump This is a thread on a replication source for sending binary log contents to a replica. Connect Used by replication receiver threads connected to the source, and by replication ...
https://dev.mysql.com/doc/refman/8.4/en/thread-pool-information-schema-tables.html
They provide information about thread pool operation: TP_THREAD_GROUP_STATE: Information about thread pool thread group states TP_THREAD_GROUP_STATS: Thread group statistics TP_THREAD_STATE: Information about thread pool thread states Rows in these ... Note The INFORMATION_SCHEMA thread pool tables are deprecated, and subject to removal in a future version of ...
https://dev.mysql.com/doc/refman/8.4/en/using-explain.html
If you have a problem with indexes not being used when you believe that they should be, run ANALYZE TABLE to update table statistics, such as cardinality of keys, that can affect the choices the optimizer makes. The EXPLAIN statement provides ...
https://dev.mysql.com/doc/relnotes/mysql/8.4/en/news-8-4-4.html
(Bug #115457, Bug #36796094) InnoDB: CPU usage statistics did not account for a processor count over 128, which could degrade performance on these larger systems. Account Management Notes C API Notes Character Set Support Compilation Notes ...
https://dev.mysql.com/doc/mysql-cluster-manager/8.4/en/mcm-attribute-tables-mgmd.html
PortNumberStats: Port number used to get statistical information from management server. ArbitrationDelay: When asked to arbitrate, arbitrator waits this long before voting (milliseconds). ExtraSendBufferMemory: Memory to use for send buffers in ...
https://dev.mysql.com/doc/relnotes/mysql-cluster/8.4/en/news-8-4-3.html
Shutdown of a data node late in a schema transaction updating index statistics caused the president node to shut down as well. MySQL NDB Cluster 8.4.3 is a new LTS release of NDB 8.4, based on MySQL Server 8.4 and including features in version 8.4 ...
https://dev.mysql.com/doc/mysql-router/9.4/en/router-set-trace.html
The following events have the same attributes as mysql/query: mysql/ping mysql/stmt_prepare mysql/stmt_execute mysql/kill mysql/statistics mysql/set_option mysql/reload mysql/list_fields The following events have no attributes: ... MySQL Router ...
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