Performance Schema events_stages_summary_by_host_by_event_name Table
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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