Symptoms

Assume that you enable Query Store in SQL Server 2016 and 2017. When you run the command ALTER DATABASE <DatabaseName> SET QUERY_STORE CLEAR on a very busy database, you may notice that the transactions and log truncation will be blocked by a Query Store background thread.

Resolution

This issue is fixed in the following cumulative updates for SQL Server:

       Cumulative Update 11 for SQL Server 2017

       Cumulative Update 5 for SQL Server 2016 Service Pack 2

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:

Latest cumulative update for SQL Server 2017

Latest cumulative update for SQL Server 2016

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References

Learn about the terminology that Microsoft uses to describe software updates.

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