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 there is a wait by the FILESTREAM garbage collector to do either of the following:

  • Disable garbage collection (used by backup and restore).
  • Execute one cycle of the FILESTREAM garbage collector. Information from Microsoft®
Very rare

This wait never occurs for most instances

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

Prevalence of FS_FC_RWLOCK across the Spotlight Population

For 80 % of hours with this wait, average wait time is less than 1.1 ms

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

2 instances contributed data to this chart

Latency Distribution of FS_FC_RWLOCK across the Spotlight Population