wlm_query_slot_count | 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.

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.