How to tell which COM+ Application belongs to what dllhost.exe in Microsoft IIS


Not to mention the .NET runtime, dllhost.exe also hosts COM+ processes.  So how can you tell what each dllhost.exe is running?  Download tlist.exe (part of the Debugging Tools for Windows).  You can read more about the util here:  http://msdn.microsoft.com/en-us/library/cc267860.aspx

It’s just a simple task list viewer that displays info about the process.  There are tons of utils out there than can do the same thing but tlist.exe is a mere 50 KB command line util which is why I like to keep it around for quickly gathering info. 

The command I use to check the dllhost.exe is:

tlist -k | find /i "dllhost.exe"

and it outputs the processes, process IDs, and the related COM+ process.

About Jason Samuel

Jason Samuel lives in Houston, TX with a primary focus on strategic advisory and architecture of end-user computing, security, enterprise mobility, virtualization, and cloud technologies from Citrix, Microsoft, & VMware. He also has an extensive background in web architecture and networking over his 20+ year career in IT. He is an Author, Speaker, and Local User Group Community Leader. He is certified in several technologies and is 1 of 63 people globally that is a recipient of the prestigious Citrix Technology Professional (CTP) award. He is 1 of 42 people in the world that has been awarded as a VMware EUC Champion and VMware vExpert. He is a featured author on DABCC which provides the latest IT Community News on Cloud, Data Center, Desktop, Mobility, Security, Storage, & Virtualization. In his spare time Jason enjoys writing how-to articles and evangelizing the technologies he works with. Disclaimer: The content and opinions expressed in articles and posts are his own and are by no means associated with his employer.

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