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


Full-text is waiting on master merge operation. Documented for informational purposes only. Not supported. Future compatibility is not guaranteed. Information from Microsoft®

Very rare

This wait never occurs for most instances

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

Prevalence of FT_MASTER_MERGE across the Spotlight Population

For 70 % of hours with this wait, average wait time is less than 1.4 minutes

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

60 instances contributed data to this chart

Latency Distribution of FT_MASTER_MERGE across the Spotlight Population