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 1.9 TB of data collected from 8727 instances uploaded by 1101 Spotlight users over the last 15 weeks. You, as a community member can edit this page by clicking the "Add your comment, or answer" button below.


SQL Server versions: 2012, 2014, 2016


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Very rare

This wait never occurs for most instances

For each of 8727 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 65 % of hours with this wait, average wait time is less than 0.068 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.

419 instances contributed data to this chart

Latency Distribution of QUERY_TASK_ENQUEUE_MUTEX across the Spotlight Population