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:
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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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