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: CPU
SQL Server versions: 2005, 2008, 2008 R2, 2012, 2014, 2016, 2017


2 Answers


Occurs when a task voluntarily yields the scheduler for other tasks to execute. During this wait the task is waiting for its quantum to be renewed. Information from Microsoft®


Used to indicate a worker has yielded to let other workers run on a scheduler.

Very common

This wait is very common for most instances

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

Prevalence of SOS_SCHEDULER_YIELD across the Spotlight Population

For 64 % of hours with this wait, average wait time is less than 0.026 ms

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

4191 instances contributed data to this chart

Latency Distribution of SOS_SCHEDULER_YIELD across the Spotlight Population