FIX: A memory leak occurs when SQL Server procedure cache consumes too much memory

Applies to: SQL Server 2016 DeveloperSQL Server 2016 EnterpriseSQL Server 2016 Enterprise Core More

Symptoms


If the SQL Server procedure cache consumes too much memory that has several entries in it, and the Query Store is enabled, a memory leak will occur. Additionally, when you execute DBCC PROCCACHE, the value of the num proc buffs column is a fairly big number but that of the proc cache used column is just 0, 1, or 2.

Resolution


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

Cumulative Update 2 for SQL Server 2016 SP1

Cumulative Update 4 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.