Which,w3wp.exe,process,belongs technology Which w3wp.exe process belongs to which App Pool in IIS6
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Along with Windows Server 2003 and Internet Information Services 6.0 came a large number of benefits. For us IIS admins, it was a great welcome set of changes. But, one apparent difficultly is matching up the w3wp.exe processes displayed in Task Manager to the Application Pools in IIS.Review of IIS5In IIS5.0 (Windows 2000 Server), each site that is set to Out Of Process will spin up a new instance of dllhost.exe. Windows Task Manager lists them. Now, the trick is to find out which dllhost.exe matches which site. My favorite way is to use Component Services. To do so, open Component Services from Administrative Tools, drill down to Computers -> My Computer and select COM+ Applications. Now select View from the top menu and select Status. Beside each site that currently has a dllhost.exe process spun up is the Process ID (PID). Using Task Manager, you can tell the memory and CPU.Note: If the Process ID doesn't display for you in Task Manager, select View -> Select Columns and add it.What about IIS6?But, that doesn't work anymore with IIS6.0. Now each site in IIS6 is placed in an Application Pool. Each Application Pool is completely separated from other App Pools by running in its own process called w3wp.exe. This make life SO much easier. Now, the trick is to match up the process shown in Task Manager with the Application Pool set up in IIS.If there is a different user for each application pool, Windows Task Manager is the easiest way to find out which application pool belongs to which site since Task Manager will display the user the process runs as.But, what happens if you have multiple application pools running as the same user? For example, if you keep to the default NETWORK SERVICE user but create multiple Application Pools, you may want to know which process belongs to which App Pool. Component Services doesn't work for this anymore.Enough already, tell me how to do it!Have no worries, Microsoft has given us the exact tool for the situation. IISApp.vbs lists all the applications, their PID and their App Pool name.The script is already placed in systemrootsystem32 on Windows Server 2003 so simply go to your Command Prompt and type in iisapp.vbs (the .vbs is optional) and you'll have an instant list of all the App Pool information you've always wanted to know. You may need to type cscript iisapp.vbs if CScript isn't your default WSH script host.Let's see an example of the output:W3WP.exe PID: 1468 AppPoolId: AppPoolForSite1.comW3WP.exe PID: 3056 AppPoolId: AppPoolForSite2.comW3WP.exe PID: 1316 AppPoolId: AppPoolForSite3.comDirect from the horse's mouth, Microsoft documents this:http://www.microsoft.com/resources/documentation/WindowsServ/2003SummaryWe've seen here that using iisapp.vbs, you can painlessly match up the PID to the friendly name of the Application Pool.Scott Forsyth is Director of IT with ORCS Web, Inc. - a company that provides managed hosting services for clients who develop and deploy their applications on Microsoft Windows platforms. Article Tags: Process Belongs, Task Manager, Application Pools, Each Site, Component Services, Application Pool
Which,w3wp.exe,process,belongs