Waitopedia is a comprehensive resource of information about SQL Server waits.
The description shown below is the top answer as voted by the Spotlight community.
The charts are based on 2.1 TB of data collected from 4207 instances uploaded by 323 Spotlight users over an 8 week period.
QUERY_TASK_ENQUEUE_MUTEX
What is QUERY_TASK_ENQUEUE_MUTEX?
This wait never occurs for most instances
For each of 4207 instances, we ranked QUERY_TASK_ENQUEUE_MUTEX on how frequent it is compared to all other recent waits. The chart shows the total of all rankings.
Prevalence of QUERY_TASK_ENQUEUE_MUTEX across the Spotlight Population
For 62 % of hours with this wait, average wait time is less than 0.18 ms
For each instance, we found all the recent hours when it had a QUERY_TASK_ENQUEUE_MUTEX wait. We found the average latency for each of those hours.
183 instances contributed data to this chart