Occurs when the deadlock monitor and sys.dm_os_waiting_tasks try to make sure that SQL Server is not running multiple deadlock searches at the same time. Information from Microsoft®
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.
DEADLOCK_ENUM_MUTEX
Category: Lock
SQL Server versions: 2005, 2008, 2008 R2, 2012, 2014, 2016, 2017
What is DEADLOCK_ENUM_MUTEX?
1 Answer
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answered 3348 days ago
Spotlight Essentials
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This wait never occurs for most instances
For each of 4207 instances, we ranked DEADLOCK_ENUM_MUTEX on how frequent it is compared to all other recent waits. The chart shows the total of all rankings.
Prevalence of DEADLOCK_ENUM_MUTEX across the Spotlight Population
For 65 % of hours with this wait, average wait time is less than 11 ms
For each instance, we found all the recent hours when it had a DEADLOCK_ENUM_MUTEX wait. We found the average latency for each of those hours.
1350 instances contributed data to this chart