Forum posts for perfmon.exe

ASP.NET “Sessions Timed Out” Counter (perfmon.exe)

I'm currently load testing an ASP.NET application. I'm charging with 500 users on the app,
and while it's running I'm checking, in a perfmon.exe console, the 'Sessions Actives' and 'Sessions Timed Out' counters on the web server.

In my web.config, the session timeout is 3 minutes (for test's purpose).

So as the test goes, the 'Sessions Actives' counter stays on about 900 active sessions, which I assume is normal because of the 500 active users and about 400 other whose sessions haven't timed out yet.

But when I look at the 'Session Timed Out' counter, it countinuously increases. It just goes down gradually when the load test finishes.

What is this counter exactly? As I understand it, it's the deprecated sessions that have not been yet cleaned up (by the garbage collector?) and are still using memory.

Since our application is using a huge ammount of memory, I'm trying to find exactly where is that memory.

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