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

This is an idle wait and so it can be safely ignored.


1 Answer


Occurs when a checkpoint is throttling the issuance of new I/Os in order to avoid flooding the disk subsystem. Information from Microsoft®

Very rare

This wait never occurs for most instances

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

Prevalence of SLEEP_BPOOL_FLUSH across the Spotlight Population

For 27 % of hours with this wait, average wait time is around 0.51 ms

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

1092 instances contributed data to this chart

Latency Distribution of SLEEP_BPOOL_FLUSH across the Spotlight Population