Performance Schema events_stages_summary_by_host_by_event_name Table

This table summarizes stage events aggregated by the client host and the event name, allowing performance analysis per host.

The table lists stage events, summarized by host and event name.

It contains the following columns:

Column	Description
HOST	Host. Used together with EVENT_NAME for grouping events.
EVENT_NAME	Event name. Used together with HOST for grouping events.
COUNT_STAR	Number of summarized events, which includes all timed and untimed events.
SUM_TIMER_WAIT	Total wait time of the timed summarized events.
MIN_TIMER_WAIT	Minimum wait time of the timed summarized events.
AVG_TIMER_WAIT	Average wait time of the timed summarized events.
MAX_TIMER_WAIT	Maximum wait time of the timed summarized events.

Example

SELECT * FROM events_stages_summary_by_host_by_event_name\G
...
*************************** 216. row ***************************
          HOST: NULL
    EVENT_NAME: stage/sql/Waiting for event metadata lock
    COUNT_STAR: 0
SUM_TIMER_WAIT: 0
MIN_TIMER_WAIT: 0
AVG_TIMER_WAIT: 0
MAX_TIMER_WAIT: 0
*************************** 217. row ***************************
          HOST: NULL
    EVENT_NAME: stage/sql/Waiting for commit lock
    COUNT_STAR: 0
SUM_TIMER_WAIT: 0
MIN_TIMER_WAIT: 0
AVG_TIMER_WAIT: 0
MAX_TIMER_WAIT: 0
*************************** 218. row ***************************
          HOST: NULL
    EVENT_NAME: stage/aria/Waiting for a resource
    COUNT_STAR: 0
SUM_TIMER_WAIT: 0
MIN_TIMER_WAIT: 0
AVG_TIMER_WAIT: 0
MAX_TIMER_WAIT: 0

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