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 when the SQLOS scheduler switches to preemptive mode to perform Windows failover cluster operations. Information from Microsoft®

Very rare

This wait never occurs for most instances

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

Prevalence of PREEMPTIVE_CLUSAPI_CLUSTERRESOURCECONTROL across the Spotlight Population

For 14 % of hours with this wait, average wait time is around 1.7 ms

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

213 instances contributed data to this chart

Latency Distribution of PREEMPTIVE_CLUSAPI_CLUSTERRESOURCECONTROL across the Spotlight Population