KB4551720 - FIX: Access violation exception occurs when promoting latches of frequently used database pages in SQL Server 2016 and 2017


Assume that you run Microsoft SQL Server 2016 or 2017 in a virtualization environment, such as VMWare, in which hot-add CPU and memory functionality are enabled. In this situation, you notice that the SQL Server process may terminate unexpectedly and generate an access violation exception in the error log. 


The exception occurs when SQL Server attempts to promote the latch to super latch for database pages that are frequently used.


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


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

About cumulative updates for SQL Server:

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:

More Information

For more information on the best practices to be followed for SQL Server configurations on virtualization environment, see Best practices for SQL Server configurations on VMware.


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

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