PDF (US Ltr)
- 43.3Mb
PDF (A4)
- 43.4Mb
Man Pages (TGZ)
- 296.5Kb
Man Pages (Zip)
- 401.8Kb
Info (Gzip)
- 4.3Mb
Info (Zip)
- 4.3Mb
Search Results
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-processlist-table.html
row *************************** ID: 5 USER: event_scheduler HOST: localhost DB: NULL COMMAND: Daemon TIME: 137 STATE: Waiting on empty queue INFO: NULL *************************** 2. row *************************** ID: 9 USER: me HOST: ... The MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-socket-instances-table.html
The socket_instances table provides a real-time snapshot of the active connections to the MySQL server. Information available in this table provides a real-time snapshot of the active connections to the server. Wait times for active sockets are ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-statement-summary-tables.html
The QUERY_SAMPLE_TEXT, QUERY_SAMPLE_SEEN, and QUERY_SAMPLE_TIMER_WAIT columns also are neither grouping nor summary columns; they support statement sampling.) The maximum number of rows in the table is autosized at server startup. For example, the ... The Performance Schema maintains tables for collecting current and recent statement events, and aggregates that information in summary ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-system-variables.html
This occurs even if the new statement wait time is less than that of the current sample statement. The default value is calculated at server build time based on the number of commands in the client/server protocol and the number of SQL statement ...
https://dev.mysql.com/doc/refman/8.0/en/replication-gtids-failover.html
This method is simple and effective, but requires the replica to read the binary log from the source; it can sometimes take a comparatively long time for the new replica to catch up with the source, so this method is not suitable for fast failover ... There are a number of techniques when using MySQL Replication with Global Transaction Identifiers (GTIDs) for provisioning a new replica which can then be used for scaleout, being promoted to source as necessary for ...
https://dev.mysql.com/doc/refman/8.0/en/replication-threads-monitor-main.html
row *************************** Id: 2 User: root Host: localhost:32931 db: NULL Command: Binlog Dump Time: 94 State: Has sent all binlog to slave; waiting for binlog to be updated Info: NULL Here, thread 2 is a Binlog Dump thread that services a ...
https://dev.mysql.com/doc/refman/8.0/en/scheduler-component.html
At startup, the scheduler component registers the performance_schema.component_scheduler_tasks table, which lists the currently scheduled tasks and some runtime data about each one. The scheduler component implements the service using these ... Note ...
https://dev.mysql.com/doc/refman/8.0/en/show-table-status.html
For example, InnoDB stores multiple tables in its system tablespace and the data file timestamp does not apply. Even with file-per-table mode with each InnoDB table in a separate .ibd file, change buffering can delay the write to the data file, so ... SHOW TABLE STATUS [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr] SHOW TABLE STATUS works likes SHOW TABLES, but provides a lot of information about each non-TEMPORARY ...
https://dev.mysql.com/doc/refman/8.0/en/stored-program-restrictions.html
If you refer to a temporary table multiple times in a stored function under different aliases, a Can't reopen table: 'tbl_name' error occurs, even if the references occur in different statements within the function. In addition—due to rounding, ...
https://dev.mysql.com/doc/refman/8.0/en/sys-host-summary.html
statement_latency The total wait time of timed statements for the host. statement_avg_latency The average wait time per timed statement for the host. file_io_latency The total wait time of timed file I/O events for the host. These views summarize ...