Hello Asaf,

If you're using IIS6, "w3wp.exe" is the worker process which host the
ASP.NET applications. Also, in IIS6, by default it use the "Application
Pool" process isolation model, thus , all the ASP.NET applications which
use the same Application Pool will share the same w3wp.exe worker process.  
And there exists an script utility which can help display all the runnning
IIS worker process and their associated Application Pool info:

#Identifying the Worker Process Process ID (IIS 6.0)
http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/2
228ff79-0838-4143-8680-e38c452dc243.mspx

Hope this helps.

Regards,

Steven Cheng
Microsoft Online Community Support

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