I'm trying to troubleshoot some performance issues we are having on a specific ASP.NET page with Microsoft's Perfecto Tool on IIS 7.5. Perfecto uses
the ETW hooks build in to IIS to report on specific HTTP request, and is working quite well.
However, I only want IIS to emit traces for one specific page, say "Default.aspx" in my TestApp Web Application. Following
the instructions on
the httpTracing man page, I should be able to add
the traceUrls element to my root web.config file for TestApp. This doesn't seem to affect tracing whatsoever when I do so.
For example, I've used
the following settings in
the web.config file and every request that hits
the IIS server is sending tracing messages that are in turn picked up by Perfecto. (In
the System.WebServer section)
<httpTracing>
<traceUrls>
<add value="/Default.aspx" />
</traceUrls>
</httpTracing>
I then found that
the applicationHost.config file on
the server had an empty element. I tried removing this element, as well as
the httpTracing element in
the web.config. After a
machine reboot, I was still getting tracing messages! My understanding is that
the presense of
the httpTracing element is what controlls whether ETW tracing is on or not. I ensured there was no reference to httpTracing in
the machine.config, too.
At a loss, I decided to remove
the IIS Tracing feature with Server Manager. After a reboot, I no longer got ETW tracing. I then reinstalled IIS Tracing feature with Server Manager. As expected,
the httpTracing element reappeared in
the applicationhost.config file. Tracing messages began sending again for all sites and pages.
I then tried to use
the traceUrls element at
the applicationhost.config level. This also didn't filter out and traces.
I must be misunderstanting something key with how httpTracing works. There aren't many resources on
the web to help me, either.
Can anyone tell me if what I'm trying should work? Has anyone else had success filtering tracing message per page with traceUrls?
I should note that I also tried changing with
the following setting in applicationhost.config to "allow". It didn't seem to help.
<section name="httpTracing" overrideModeDefault="Allow" />
