FIX: Parallel queries are slower when they are run with high DOP in SQL Server 2016

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

Symptoms


In Microsoft SQL Server 2016, assume that you execute parallel queries with the TOP keyword and very skewed data in the column that are used to join two tables. In some situations, these parallel queries may take much longer time to run if the queries are run with a high Degree of Parallelism (DOP).

Resolution


Service pack information for SQL Server 2016

This issue is fixed in the following service pack for SQL Server:

       Service Pack 2 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.