Performance Schema events_stages_summary_by_thread_by_event_name Table
The table lists stage events, summarized by thread and event name.
It contains the following columns:
| Column | Description |
|---|---|
THREAD_ID | Thread associated with the event. Together with EVENT_NAME uniquely identifies the row. |
EVENT_NAME | Event name. Used together with THREAD_ID 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_thread_by_event_name\G
...
*************************** 2287. row ***************************
THREAD_ID: 64
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
*************************** 2288. row ***************************
THREAD_ID: 64
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
*************************** 2289. row ***************************
THREAD_ID: 64
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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