Microsoft KB Archive/938276

= FIX: The # Induced GC performance counter value increases quickly and CPU usage becomes high when you run an ASP.NET 2.0 Web application that is built on the .NET Framework 2.0 =

Article ID: 938276

Article Last Modified on 9/11/2007

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APPLIES TO


 * Microsoft .NET Framework 2.0

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SYMPTOMS
When you run a Microsoft ASP.NET 2.0 Web application that is built on the .Microsoft NET Framework 2.0, the value of the # Induced GC performance counter increases very quickly. Additionally, CPU usage becomes high, and the computer performance decreases.

Note You can view the # Induced GC performance counter in the Performance Monitor counters. The value of the counter increases for every call that is sent to the GC.Collect method.



CAUSE
The issue occurs because of a problem in the method that ASP.NET uses to scavenge the cache objects. The problem causes insufficient memory to be reclaimed on each call to the GC.Collect method. The excessive calls to the GC.Collect method cause high CPU usage.



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only 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 .NET Framework 2.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer 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
You must have the .NET Framework 2.0 installed to apply this hotfix.

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

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 item in Control Panel.

The .NET Framework 2.0, x64-based versions


STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
ASP.NET scavenges cache items when memory is low. For more information about ASP.NET caching, visit the following Web site:

http://msdn2.microsoft.com/en-us/library/ms178597.aspx

This hotfix changes the method that ASP.NET uses to scavenge the cache objects so that fewer calls are sent to the GC.Collect method.

The hotfix for the .NET Framework 2.0 x64 and for the .NET Framework 2.0 IA-64 changes the files in the Framework folder for x86-based versions on these two platforms. For more information, 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

Keywords: kbfix kbqfe kbpubtypekc kbexpertiseadvanced kbhotfixserver KB938276

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