Performance Schema objects_summary_global_by_type Table

It aggregates object wait events, and contains the following columns:

Column	Description
`OBJECT_TYPE`	Groups records together with `OBJECT_SCHEMA` and `OBJECT_NAME`.
`OBJECT_SCHEMA`	Groups records together with `OBJECT_TYPE` and `OBJECT_NAME`.
`OBJECT_NAME`	Groups records together with `OBJECT_SCHEMA` and `OBJECT_TYPE`.
`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.

You can TRUNCATE the table, which will reset all counters to zero.

Example

SELECT * FROM objects_summary_global_by_type\G
...
*************************** 101. row ***************************
   OBJECT_TYPE: TABLE
 OBJECT_SCHEMA: test
   OBJECT_NAME: v
    COUNT_STAR: 0
SUM_TIMER_WAIT: 0
MIN_TIMER_WAIT: 0
AVG_TIMER_WAIT: 0
MAX_TIMER_WAIT: 0
*************************** 102. row ***************************
   OBJECT_TYPE: TABLE
 OBJECT_SCHEMA: test
   OBJECT_NAME: xx2
    COUNT_STAR: 2
SUM_TIMER_WAIT: 1621920
MIN_TIMER_WAIT: 481344
AVG_TIMER_WAIT: 810960
MAX_TIMER_WAIT: 1140576

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