FIX: The “sys.dm_db_column_store_row_group_physical_stats” query runs slowly on SQL Server 2016

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

Symptoms


Assume that you have a server that is running SQL Server 2016. When you run the sys.dm_db_column_store_row_group_physical_stats query to search columnstore indexes in the current database, the query may take a long time to return the results.

Cause


This issue occurs because the sys.dm_db_column_store_row_group_physical_stats query does a join with the sys.column_store_segments view, which is expensive. After you install this update, this view is replaced with the syscscolsegments view to retrieve the needed information.

Resolution


This update is included in Cumulative Update 1 for SQL Server 2016 Service Pack 1.

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.