Symptoms

You use the AlwaysOn Availability Groups feature in Microsoft SQL Server 2014 Service Pack 1 (SP1). You also have memory-optimized tables defined in at least one availability group database. In this situation, the wait time of HADR_SYNC_COMMIT wait types might become longer than expected, this might decrease the performance of an instance of SQL Server, and users may report slower INSERT, UPDATE, and DELETE (DML) operations.

Resolution

This problem was first fixed in the following cumulative update for SQL Server 2014:

Cumulative Update 2 for SQL Server 2014 Service Pack 1

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 2014:

SQL Server 2014 build versions

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 Microsoft uses to describe software updates.

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