FIX: Service Broker UCS task leaks memory in SQL Server 2014 or 2016

Symptoms

Assume that you have AlwaysOn Availability Groups configured in SQL Server 2014 or 2016. If an application uses the TABLOCK hint, the Service Broker Usage Control Service (UCS) task leaks memory. In this situation, you can see that the number of tasks in the sys.dm_os_tasks function continuously grows. This causes AlwaysOn synchronization to become slow.

Cause

This problem occurs because the UCS task leak may cause Lock Monitor to consume more CPU usage.

Resolution

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


About cumulative updates for SQL Server
About cumulative updates for SQL Server

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.
Properties

Article ID: 3154482 - Last Review: Sep 22, 2016 - Revision: 1

Microsoft SQL Server 2014 Developer, Microsoft SQL Server 2014 Developer, Microsoft SQL Server 2014 Developer, Microsoft SQL Server 2014 Developer, Microsoft SQL Server 2014 Enterprise, Microsoft SQL Server 2014 Enterprise, Microsoft SQL Server 2014 Enterprise, Microsoft SQL Server 2014 Enterprise, Microsoft SQL Server 2014 Standard, Microsoft SQL Server 2014 Standard, Microsoft SQL Server 2014 Standard, Microsoft SQL Server 2014 Standard

Feedback