Article ID: 2806979 - View products that this article applies to.
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Symptoms

Consider the following scenario:
  • In Microsoft SQL Server 2012, you run a query against a table.
  • The query uses a parallel plan.
  • Read committed snapshot isolation (RCSI) is enabled at the database level.
In this scenario, you experience poor performance in SQL Server 2012. Additionally, many latch waits occur in the NESTING_TRANSACTION_FULL or NESTING_TRANSACTION_READONLY latch class.

Notes
  • To view the information about the latch waits, use the sys.dm_os_latch_stats dynamic management view.
  • To view the information about the wait queue of tasks that are waiting on a resource, use the sys.dm_os_waiting_tasks dynamic management view.

Resolution

This issue is resolved in Microsoft SQL Server 2012 Service Pack 2 (SP2).

Service pack information for SQL Server 2012

To resolve this problem, obtain the latest service pack for Microsoft SQL Server 2012. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
2755533 How to obtain the latest service pack for SQL Server 2012

Cumulative update information

Cumulative Update 3 for SQL Server 2012 SP1

The fix for this issue was first released in Cumulative Update 3. For more information about how to obtain this cumulative update package for SQL Server 2012 SP1, click the following article number to view the article in the Microsoft Knowledge Base:
2812412 Cumulative update package 3 for SQL Server 2012 Service Pack 1
Note Because the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2012 SP1 fix release. We recommend that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
2772858 The SQL Server 2012 builds that were released after SQL Server 2012 Service Pack 1 was released

Status

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

References

For more information about the Incremental Servicing Model for SQL Server, click the following article number to view the article in the Microsoft Knowledge Base:
935897 An Incremental Servicing Model is available from the SQL Server team to deliver hotfixes for reported problems
For more information about the naming schema for SQL Server updates, click the following article number to view the article in the Microsoft Knowledge Base:
822499 Naming schema for Microsoft SQL Server software update packages
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Properties

Article ID: 2806979 - Last Review: June 10, 2014 - Revision: 4.0
Applies to
  • Microsoft SQL Server 2012 Service Pack 1
  • Microsoft SQL Server 2012 Service Pack 2, when used with:
    • Microsoft SQL Server 2012 Enterprise
    • Microsoft SQL Server 2012 Business Intelligence
    • Microsoft SQL Server 2012 Developer
    • Microsoft SQL Server 2012 Standard
    • Microsoft SQL Server 2012 Web
    • SQL Server 2012 Enterprise Core
Keywords: 
kbqfe kbfix kbsurveynew kbexpertiseadvanced KB2806979

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