Information Schema THREAD_POOL_GROUPS Table

MariaDB starting with 10.5

The Information Schema THREAD_POOL_GROUPS table was introduced in MariaDB 10.5.0.

The table provides information about thread pool groups, and contains the following columns:

Column Description
GROUP_ID
CONNECTIONS
THREADS
ACTIVE_THREADS
STANDBY_THREADS
QUEUE_LENGTH
HAS_LISTENER
IS_STALLED

Setting thread_pool_dedicated_listener will give each group its own dedicated listener, and the listener thread will not pick up work items. As a result, the actual queue size in the table will be more exact, since IO requests are immediately dequeued from poll, without delay.

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https://mariadb.com/kb/en/information-schema-thread_pool_groups-table/