| Bill Boswell 2005-01-21, 8:47 pm |
| I'm trying to figure out a performance chart I'm seeing on a busy Exchange
server.
I'm doing some bulk SMTP feeds for testing (no, not spam, just testing).
This is a W2K3 server with E2K3. When I really pound on the server, and CPU
utilization climbs to 100%, I notice that the bulk of the processor time is
taken by Dllhost.exe and Store.exe.
Okay, high utilization by Store doesn't surprise me, but the IIS 6.0
documentation specifically states that the SMTP service is hosted by
Inetinfo.exe, not Dllhost.exe. In fact, the technet site shows an errata for
the IIS 6.0 Administrator's Companion that removes SMTP from Dllhost.exe and
assigns it to Inetinfo.exe.
So, why am I seeing such high utilization from Dllhost.exe during heavy SMTP
loads? Anybody have a clue?
-bill
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