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: CLR
SQL Server versions: 2008, 2008 R2, 2012, 2014, 2016, 2017


1 Answer


Occurs while waiting for a CLR task to complete startup. Information from Microsoft®

Very rare

This wait never occurs for most instances

For each of 4207 instances, we ranked CLR_TASK_START on how frequent it is compared to all other recent waits. The chart shows the total of all rankings.

Prevalence of CLR_TASK_START across the Spotlight Population

For 83 % of hours with this wait, average wait time is less than 0.21 ms

For each instance, we found all the recent hours when it had a CLR_TASK_START wait. We found the average latency for each of those hours.

445 instances contributed data to this chart

Latency Distribution of CLR_TASK_START across the Spotlight Population