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https://dev.mysql.com/doc/refman/8.0/en/innodb-performance-midpoint_insertion.html
Both innodb_old_blocks_pct and innodb_old_blocks_time can be specified in the MySQL option file (my.cnf or my.ini) or changed at runtime with the SET GLOBAL statement. The pages are moved to the front of the list (the most-recently used end) when ...
https://dev.mysql.com/doc/refman/8.0/en/kill.html
KILL [CONNECTION | QUERY] processlist_id Each connection to mysqld runs in a separate thread. You can also use the mysqladmin processlist and mysqladmin kill commands to examine and kill threads. In most cases, it might take some time for the ...
https://dev.mysql.com/doc/refman/8.0/en/replication-mode-change-online-verify-transactions.html
Or wait for a day, or whatever time period you consider safe for your deployment. This section explains how to monitor a replication topology and verify that all anonymous transactions have been replicated. This is helpful when changing the ...
https://dev.mysql.com/doc/refman/8.0/en/show-triggers.html
For the ins_sum trigger defined in Section 27.3, “Using Triggers”, the output of SHOW TRIGGERS is as shown here: mysql> SHOW TRIGGERS LIKE 'acc%'\G *************************** 1. This is a TIMESTAMP(2) value (with a fractional part in hundredths ... SHOW TRIGGERS [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr] SHOW TRIGGERS lists the triggers currently defined for tables in a database (the default database unless a FROM clause is ...
https://dev.mysql.com/doc/refman/8.0/en/sys-ps-setup-show-disabled-instruments.html
Displays all currently disabled Performance Schema instruments. This might be a long list. Parameters None. Example mysql> CALL sys.ps_setup_show_disabled_instruments()\G *************************** 1. row *************************** ...
https://dev.mysql.com/doc/refman/8.0/en/sys-ps-setup-show-enabled-instruments.html
Displays all currently enabled Performance Schema instruments. This might be a long list. Parameters None. Example mysql> CALL sys.ps_setup_show_enabled_instruments()\G *************************** 1. row *************************** ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-stages-current-table.html
The TIMER_START and TIMER_END values indicate when event timing started and ended. If an event has not finished, TIMER_END is the current timer value and TIMER_WAIT is the time elapsed so far (TIMER_END − TIMER_START). If an event is produced from ...The table stores one row per thread showing the current status of the thread's most recent monitored stage event, so there is no system variable for configuring the table ...
https://dev.mysql.com/doc/refman/8.0/en/sys-io-by-thread-by-latency.html
These views summarize I/O consumers to display time waiting for I/O, grouped by thread. total_latency The total wait time of timed I/O events for the thread. min_latency The minimum single wait time of timed I/O events for the thread. avg_latency ...The io_by_thread_by_latency and x$io_by_thread_by_latency views have these columns: user For foreground threads, the account associated with the ...
https://dev.mysql.com/doc/refman/8.0/en/sys-io-global-by-file-by-latency.html
These views summarize global I/O consumers to display time waiting for I/O, grouped by file. total_latency The total wait time of timed I/O events for the file. read_latency The total wait time of timed read I/O events for the file. write_latency ...The io_global_by_file_by_latency and x$io_global_by_file_by_latency views have these columns: file The file path ...
https://dev.mysql.com/doc/refman/8.0/en/sys-io-global-by-wait-by-bytes.html
These views summarize global I/O consumers to display amount of I/O and time waiting for I/O, grouped by event. total_latency The total wait time of timed occurrences of the I/O event. min_latency The minimum single wait time of timed occurrences ...By default, rows are sorted by descending total I/O (bytes read and ...