Microsoft KB Archive/255912

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Knowledge Base

Article ID: 255912

Article Last Modified on 11/21/2006


  • Microsoft Windows 2000 Server
  • Microsoft Internet Information Services 5.0

This article was previously published under Q255912


For a custom COM+ application, you can set the server process that is associated with the COM+ application to shut down automatically after a certain period of inactivity through the Component Services.

If the COM+ components are called from Active Server Pages (ASP), the type-library caching feature in IIS must be disabled to let this timeout take effect. The "More Information" section of this article describes how to disable the type-library caching.


The AspEnabletypelibCache value in the metabase controls the type library caching feature. Set it to False (it is set to True by default) to disable the type library caching. There are three application-protection levels in IIS:

  • Low (IIS Process)
  • Medium (Pooled)
  • High (Isolated)

The AspEnabletypelibCache setting at the /W3SVC level of the metabase affects all applications with Low (IIS Process) and Medium (Pooled) protection levels. If the application protection is set to High (Isolated), the AspEnabletypelibCache setting should be set at that application level of the metabase, so that it only applies to that application.


For more information about the AspEnabletypelibCache metabase property, visit the following Microsoft Developer Network (MSDN) Web site:

Keywords: kbinfo KB255912