Microsoft KB Archive/226319

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The information in this article applies to:


 * Microsoft Internet Information Services version 5.0

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SUMMARY
One of the new performance features introduced in Microsoft Internet Information Services (IIS) for Windows 2000 is a self-tuning mechanism called Active Server Pages Thread Gating.

ASP now detects when executing requests are blocked by external resources and automatically provides more threads to simultaneously execute additional requests and to continue normal processing. If the CPU becomes overburdened, ASP curtails the number of threads in order to reduce the constant switching that occurs when too many non-blocking requests are executing simultaneously.

The purpose of this article is to explain the various metabase properties associated with this concept.

MORE INFORMATION
The following table lists the various metabase properties associated with ASP Thread Gating. The Web service settings for these properties are applicable to all in-process application nodes, at all levels. Metabase settings at the Web-server level or lower will be ignored for in-process applications. However, settings at the Web-server level or lower will be used if that node is isolated as an out-of-process application.

Important: IIS performs thread gating to dynamically control the number of concurrently executing threads, in response to varying load conditions. The default settings for this property, and the other thread gating properties, are designed to be appropriate for the majority of server configurations and traffic conditions. Changing these properties can lead to significant performance degradation.

Additional query words: iis

Keywords :

Version : winnt:5.0

Platform : winnt

Issue type : kbinfo
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