FIX: Improved memory management for columnstore indexes to deliver better query performance in SQL Server 2014

Microsoft SQL Server 2014 persists columnstore data as large object (LOB) data types. When columnstore data is read, it flows through a buffer pool to the columnstore object pool. The fix in this article changes the life cycle of these LOB pages within the buffer pool to improve memory availability to the columnstore object pool for improved query performance.

The decreased memory availability to the columnstore object pool occurs because of a regression that occurs after you apply update 3029977.
This fix is included in the following cumulative update for SQL Server:

Cumulative Update 1 for SQL Server 2014 SP1

Cumulative Update 7 for SQL Server 2014

About cumulative updates for SQL Server
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Article ID: 3053664 - Last Review: 06/22/2015 16:12:00 - Revision: 2.0

Microsoft SQL Server 2014 Business Intelligence, Microsoft SQL Server 2014 Developer, Microsoft SQL Server 2014 Enterprise, Microsoft SQL Server 2014 Express, Microsoft SQL Server 2014 Standard, Microsoft SQL Server 2014 Web, Microsoft SQL Server 2014 Service Pack 1

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