FIX: A hotfix is available to enable the configuration of some ASP.NET properties for each application pool in IIS 7.0

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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: Note 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.

Prerequisites

To apply this hotfix, you must be running one of the following operating systems:

• Windows Vista Service Pack 2 (SP2)
• Windows Server 2008 Service Pack 2 (SP2)

For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

Installation instructions

Before you apply this hotfix, configure the following properties in the Aspnet.config file:

• maxConcurrentRequestsPerCPU - Specifies how many concurrent requests ASP.NET enables per CPU.
• maxConcurrentThreadsPerCPU - Specifies how many concurrent threads can be running for an application pool for each CPU.
• Request Queue Length - Specifies the maximum number of requests that can be queued for ASP.NET in a single process.

Note You can find the Aspnet.config file for the Microsoft .NET Framework versions 2.0 and 4 in the following directories:

The .NET Framework 2.0

The .NET Framework 4.0

These properties manage process-wide behavior globally when an ASP.NET application is running in Integrated mode on an server that is running IIS. For more information about these properties, visit the following Microsoft Developer Network (MSDN) website:After you apply this hotfix, configure the three properties that are listed at the beginning of this section for each application pool individually. To do this, follow these steps:

1. Specify the correct values for these three properties in an ASP.NET config file. For example, you use the following configurations in the configuration file and then save the configuration file as Aspnet_pool1.config.
   <system.web><applicationPool maxConcurrentRequestsPerCPU="12" maxConcurrentThreadsPerCPU="0" requestQueueLimit="5000"/></system.web>
2. In the Applicationhost.config file, add the CLRConfigFile setting in the ApplicationPools element to specify the path of the configuration file for an Integrated mode application pool. For example, you use the following configuration:
   <applicationPools>
   
   <add name="DefaultAppPool" queueLength="10000" CLRConfigFile= "<path>\aspnet_pool1.config"/>
   Note If the CLRConfigFile setting is not present, the default Aspnet.config file will be used for the application pool.

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart information

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows Vista and Windows Server 2008 file information notes

Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

• The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
  
  

  Version	Product	SR_Level	Service branch
  6.0.600 0. 20xxx	Windows Vista	RTM	LDR
  6.0.600 1 . 22xxx	Windows Vista and Windows Server 2008	SP1	LDR
  6.0.600 2 . 22xxx	Windows Vista and Windows Server 2008	SP2	LDR

• Service Pack 1 is integrated into the release version of Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxx version number.
• The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Vista and for Windows Server 2008" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are very important for maintaining the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows Vista and of Windows Server 2008

For all supported x64-based versions of Windows Vista and of Windows Server 2008

For all supported IA-64-based versions of Windows Server 2008