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

What is CLEAR_DB?

1 Answer


Occurs during operations that change the state of a database, such as opening or closing a database. Information from Microsoft®

Very rare

This wait never occurs for most instances

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

Prevalence of CLEAR_DB across the Spotlight Population

For 95 % of hours with this wait, average wait time is less than 0.05 ms

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

19 instances contributed data to this chart

Latency Distribution of CLEAR_DB across the Spotlight Population