Performance Schema events_waits_summary_by_account_by_event_name Table

The Performance Schema events_waits_summary_by_account_by_event_name table contains wait events summarized by account and event name. It contains the following columns:

Column	Description
`USER`	User. Used together with `HOST` and `EVENT_NAME` for grouping events.
`HOST`	Host. Used together with `USER` and `EVENT_NAME` for grouping events.
`EVENT_NAME`	Event name. Used together with `USER` and `HOST` for grouping events.
`COUNT_STAR`	Number of summarized events
`SUM_TIMER_WAIT`	Total wait time of the summarized events that are timed.
`MIN_TIMER_WAIT`	Minimum wait time of the summarized events that are timed.
`AVG_TIMER_WAIT`	Average wait time of the summarized events that are timed.
`MAX_TIMER_WAIT`	Maximum wait time of the summarized events that are timed.

The *_TIMER_WAIT columns only calculate results for timed events, as non-timed events have a NULL wait time.

Example

SELECT * FROM events_waits_summary_by_account_by_event_name\G
...
*************************** 915. row ***************************
          USER: NULL
          HOST: NULL
    EVENT_NAME: wait/io/socket/sql/server_tcpip_socket
    COUNT_STAR: 0
SUM_TIMER_WAIT: 0
MIN_TIMER_WAIT: 0
AVG_TIMER_WAIT: 0
MAX_TIMER_WAIT: 0
*************************** 916. row ***************************
          USER: NULL
          HOST: NULL
    EVENT_NAME: wait/io/socket/sql/server_unix_socket
    COUNT_STAR: 0
SUM_TIMER_WAIT: 0
MIN_TIMER_WAIT: 0
AVG_TIMER_WAIT: 0
MAX_TIMER_WAIT: 0
*************************** 917. row ***************************
          USER: NULL
          HOST: NULL
    EVENT_NAME: wait/io/socket/sql/client_connection
    COUNT_STAR: 0
SUM_TIMER_WAIT: 0
MIN_TIMER_WAIT: 0
AVG_TIMER_WAIT: 0
MAX_TIMER_WAIT: 0
*************************** 918. row ***************************
          USER: NULL
          HOST: NULL
    EVENT_NAME: idle
    COUNT_STAR: 0
SUM_TIMER_WAIT: 0
MIN_TIMER_WAIT: 0
AVG_TIMER_WAIT: 0
MAX_TIMER_WAIT: 0

Content reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party.

© 2021 MariaDB
Licensed under the Creative Commons Attribution 3.0 Unported License and the GNU Free Documentation License.
https://mariadb.com/kb/en/performance-schema-events_waits_summary_by_account_by_event_name-table/