Microsoft KB Archive/154832

= Disabling Thread Creation for CGI I/O in IIS 1.0 =

Article ID: 154832

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Internet Information Server 1.0

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This article was previously published under Q154832





SYMPTOMS
Internet Information Server 1.0 (IIS) creates a separate thread for Common Gateway Interface (CGI) application processing. This was not configurable in Internet Information Server.



MORE INFORMATION
Some IIS installations may benefit from using server pool threads to perform CGI application processing. This reduces the overhead of creating a new thread for each CGI application running; however, if the CGI requests take an extended period of time, it can consume a server pool thread.



RESOLUTION
Obtain the fix referenced below (under STATUS), and then modify the registry as described here. W3svc.dll was modified to accept a registry entry that disables thread creation for managing CGI application I/O. The new registry entry is UsePoolThreadForCGI.

WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.

 Run "Net Stop w3svc" Run Registry Editor (REGEDT32.EXE).  From the HKEY_LOCAL_MACHINE subtree, go to the following key:

     \SYSTEM\CurrentControlSet\Services\W3svc\Parameters

The parameters described below are located under this Registry subkey.

The following describes a new value for the W3SVC service parameters key that can only be set by adding an entry in Registry Editor. This value entry does not appear by default in the Registry, so you must add an entry if you want to change its default value. The W3SVC service must be restarted for changes to take effect.

  UsePoolThreadForCGI Data Type = REG_DWORD Value: 0 - Use a server pool thread to do CGI processing. (Default) 1 - Create a new thread to do CGI processing.

 Run "Net Start w3svc"</ol>

<div class="status_section">

STATUS
Microsoft has confirmed this to be a problem in Internet Information Server version 1.00. A fix to this problem is in development, but has not been regression-tested and may be destabilizing in production environments. Microsoft does not recommend implementing this fix at this time. Contact Microsoft Product Support Services for more information on the availability of this fix.

Additional query words: prodiis

Keywords: kbnetwork KB154832

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