As of MySQL 8.0.14, the thread pool INFORMATION_SCHEMA
tables are also available as Performance Schema tables. (See Section 27.12.16, “Performance Schema Thread Pool Tables”.) The INFORMATION_SCHEMA
tables are deprecated; expect them to be removed in a future version of MySQL. Applications should transition away from the old tables to the new tables. For example, if an application uses this query:
SELECT * FROM INFORMATION_SCHEMA.TP_THREAD_STATE;
The application should use this query instead:
SELECT * FROM performance_schema.tp_thread_state;
The TP_THREAD_STATE
table has one row per thread created by the thread pool to handle connections.
For descriptions of the columns in the INFORMATION_SCHEMA
TP_THREAD_STATE
table, see Section 27.12.16.3, “The tp_thread_state Table”. The Performance Schema tp_thread_state
table has equivalent columns.