wlm_query_slot_count - z/OS Version 1 Release 10 ok 888 slot login

The "query_queue_time" column indicates that the query is waiting in the queue for a WLM slot to execute. ... For more information, see Step 1: Override the concurrency level using wlm_query_slot_count.

The wlm_query_slot_count configuration setting is valid for the current session only. If that session expires, or another user runs a query, the WLM configuration is used.