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.


Category: Other
SQL Server versions: 2008, 2008 R2, 2012, 2014, 2016, 2017


1 Answer


Occurs during synchronization of query optimizer diagnostic output production. This wait type only occurs if diagnostic settings have been enabled under direction of Microsoft Product Support. Information from Microsoft®


This wait has never occurred recently

QUERY_OPTIMIZER_PRINT_MUTEX has not occurred recently on 4207 instances checked.

Prevalence of QUERY_OPTIMIZER_PRINT_MUTEX across the Spotlight Population