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Performance Schema events_waits_summary_global_by_event_name Table

MariaDB starting with 10.0

The events_waits_summary_global_by_event_name table, along with many other new Performance Schema tables, was added in MariaDB 10.0.

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

Column	Description
`EVENT_NAME`	Event name.
`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_global_by_event_name\G
...
*************************** 303. row ***************************
    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
*************************** 304. row ***************************
    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
*************************** 305. row ***************************
    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
*************************** 306. row ***************************
    EVENT_NAME: idle
    COUNT_STAR: 265
SUM_TIMER_WAIT: 46861125181000000
MIN_TIMER_WAIT: 1000000
AVG_TIMER_WAIT: 176834434000000
MAX_TIMER_WAIT: 4912417573000000

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https://mariadb.com/kb/en/performance-schema-events_waits_summary_global_by_event_name-table/