FIX: Threads are not scheduled evenly in SQL Server 2012 or SQL Server 2014 Standard Edition

Applies to: SQL Server 2012 StandardSQL Server 2014 StandardSQL Server 2014 Standard

Symptoms


Threads are not scheduled as evenly in Microsoft SQL Server 2012 or SQL Server 2014 Standard Edition as they are in SQL Server 2012 or SQL Server 2014 Enterprise Edition. Therefore, performance in SQL Server 2012 or SQL Server 2014 Standard Edition is slower than expected when there are many concurrent requests.

Resolution


The issue was first fixed in the following cumulative update of SQL Server.

Cumulative Update 1 for SQL Server 2014

Cumulative Update 7 for SQL Server 2012 SP1

Status


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