FIX: When you run a 64-bit application that was built by using the .NET Framework, you may notice that the application uses more memory than a similar 32-bit application

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Article ID: 912891 - View products that this article applies to.
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SYMPTOMS

When you run a 64-bit application in a 64-bit environment, you may notice that the application uses more memory than a similar 32-bit application that is running in a 32-bit environment. This problem may occur when the following conditions are true:
  • The application was built by using the Microsoft .NET Framework.
  • The application is running under a high memory load.

CAUSE

This problem occurs because the 64-bit version of the .NET Framework garbage collector (GC) performs fewer collections than the 32-bit version of the garbage collector. The range of memory that may be addressed on 64-bit computers differs from the range of memory that may be addressed on 32-bit computers. Therefore, the 64-bit garbage collector runs less frequently than it should.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft .NET Framework 2.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

The following list contains prerequisites for the hotfix:
  • Microsoft .NET Framework 2.0

Restart requirement

You must restart your computer after you apply this hotfix.

File information

The English version of this hotfix 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 tool in Control Panel.
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File nameFile versionFile sizeDateTime
mscordacwks.dll2.0.50727.56800,25605-Jan-200613:48
mscorlib.dll2.0.50727.564,308,99205-Jan-200613:48
sos.dll2.0.50727.56377,34405-Jan-200613:48
Mscorwks.dll2.0.50727.565,616,12805-Jan-200613:48

STATUS

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

MORE INFORMATION

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: 912891 - Last Review: December 3, 2007 - Revision: 1.4
APPLIES TO
  • Microsoft .NET Framework 2.0
  • Microsoft .NET Framework 1.1
  • Microsoft .NET Framework 1.0
Keywords: 
kbbug kbupdate kbfix kbqfe kbhotfixserver KB912891

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