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Editorial Team
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Asked: 2026-05-14T00:05:06+00:00

I’m running IIS 7 on Server 2008, with a single AppPool for an application

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I’m running IIS 7 on Server 2008, with a single AppPool for an application which is basically just a collection of ASP.NET WebMethods. Some of these methods process for hours before they return.

What’s weird, is that sometimes when I launch multiple simultaneous requests IIS spins up a single w3wp process (and seems to share it amongst the requests) and other times it spins up multiple w3wp processes (1 for each request).

I am always careful to use task mgr and view processes for all users when observing this. Can anyone explain this inconsistent behavior?

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1 Answer

  1. Editorial Team

    By default each app pool gets 1 w3wp process, but in a web garden multiple w3wp processes can exist per app pool.

    Edit: A little more info about web gardens

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