CODEWITHSUNDEEP
asp.net
kacalapy
kacalapy

Reputation: 10134

how to detect why my .net web app is pegging cpu at 100% intermittently?

I have a large (as in many pages, objects...) asp.net web app that pegs the server at 100% at times for no reason that i can tell. is there a way to detect what page is at fault?

I know its asp.net and not sql because task manager shows w3wp.exe as the culprit.

are there tools for doing this? or profiling .net web apps?

Upvotes: 4

Views: 616

Answers (4)

this. __curious_geek
this. __curious_geek

Reputation: 43207

ASP.Net Tracing is the answer.

http://www.asp101.com/articles/robert/tracing/default.asp

http://www.asp.net/general/videos/how-do-i-implement-tracing-in-an-aspnet-web-site

enter image description here
(source: asp101.com)

Upvotes: 2

PHeiberg
PHeiberg

Reputation: 29801

If you can repeat the issue on a test server or you own machine you can use a profiler (the one included in Visual Studio 2010 or any other) to figure out what's happening.

If the problem only occurs in production you probably are best off performing a dump of the process when the problem is occuring and analyze it using DebugDiag.

Tess Ferrandez has lots of information on her blog on how to perform low level analysis of application behaviour on her blog as well, including how to use DebugDiag.

Upvotes: 0

Mike Cole
Mike Cole

Reputation: 14703

Check out this Red Gate product: http://www.red-gate.com/products/dotnet-development/ants-performance-profiler/

It's not trivial to master, though.

Upvotes: 2

hova
hova

Reputation: 2841

You wouldn't by chance happening to be using GC.Collect() in your web app would you? Excessive calls to GC.Collect() for large applications will cause it to spike to 100% as it scans memory to look for disposable objects. If you call GC.Collect() in rapid succession, you would likely get a continuous 100% cpu usage when memory usage is high.

Upvotes: -1

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