FIX: Poor performance when you run an MDX query that contains a sub-select of different granularities in SSAS 2012

Symptoms


Assume that you are using Microsoft SQL Server 2012 Analysis Service (SSAS 2012) or SQL Server 2014 Analysis Service (SSAS 2014). When you run a Multidimensional Expressions (MDX) query against a large database that has a sub-select of different granularities, the query may take a much longer time than the single granularity under the same logic.

Resolution

The issue was first fixed in the following cumulative updates for SQL Server:

Cumulative Update 2 for SQL Server 2014 SP1

Cumulative Update 8 for SQL Server 2014

Cumulative Update 6 for SQL Server 2012 SP2
Recommendation: Install the latest cumulative update for SQL Server

Status

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

Article ID: 3033456 - Last Review: Aug 25, 2015 - Revision: 1

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