Symptoms

When you execute parallel queries on a database that has Snapshot Isolation enabled in Microsoft SQL Server 2016, then a Latch contention may occur on the Latch NESTING_FULL_TRANSACTION.

Similarly, Latch Contention may also occur when you execute parallel queries on a readable secondary replica of Always on Availability Groups.

This may cause performance degradation due to high wait times on the latch NESTING_FULL_TRANSACTION.

Resolution

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

Cumulative Update 4 for SQL Server 2016

Cumulative Update 1 for SQL Server 2016 SP1

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 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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