Cumulative update package 3 for Microsoft AppFabric 1.1 for Windows Server


Cumulative update package 3 for Microsoft AppFabric 1.1 for Windows Server is available. This update package resolves the issue that is described in the "More Information" section.

This cumulative update includes all the fixes that were included in cumulative update package 2 for AppFabric 1.1 for Windows Server. For more information, click the following article number to view the article in the Microsoft Knowledge Base: 

2716015 Cumulative update package 2 for Microsoft AppFabric 1.1 for Windows Server

More Information

Issue that is fixed in this update


It may take longer than expected for API calls to access the cache of AppFabric 1.1 for Windows Server. This issue typically occurs on servers that have a large amount of memory.


This issue occurs because it takes longer than expected for the garbage collection calls to be processed in the Microsoft .NET Framework. Therefore, the API calls experience high latency.


After you apply this cumulative update, AppFabric uses a nonblocking garbage collection (background server garbage collection). Nonblocking garbage collection is a new feature in the .NET Framework 4.5. 

To apply this fix, follow these steps:

  1. Upgrade the servers to the .NET Framework 4.5.

  2. Install the cumulative update package.

  3. Enable the fix by using the following setting in the DistributedCacheService.exe.config file:

    <appSettings><add key="backgroundGC" value="true"/></appSettings>
  4. Restart the AppFabric Caching service for the update to take effect.

Note By default, the DistributedCacheService.exe.config file is located under the following directory:

%ProgramFiles%\AppFabric 1.1 for Windows Server

How to obtain cumulative update package 3 for Microsoft AppFabric 1.1 for Windows Server

Cumulative update package information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


To apply this cumulative update package, you must have AppFabric 1.1 for Windows Server installed. Additionally, you must have the .NET Framework 4.5 installed.

Restart requirement

You may have to restart the computer after you apply this cumulative update package.

File information

The English version of this cumulative update package has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

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