Server going to 100% CPU

[joelcc]

I recently upgraded our member portal by connecting it to an identity server through crosstalk.   Since we have pushed it out it will run about 2 hours and then it spike to 100% when it gets under a heavy load.   Any ideas?  We are using IWRtlFix so I know that is not the issue.

iw 15.2.25
Is it deployed under IIS.

[kudzu]

1) Can you reproduce the same behavior when deployed as SA?

2) Add some logging to your code and then use a stress tool against it. In most cases its user code getting stuck in some kind of thread contention issue.

[joelcc]

1) Can you reproduce the same behavior when deployed as SA?

2) Add some logging to your code and then use a stress tool against it. In most cases its user code getting stuck in some kind of thread contention issue.

Thanks for the pointers.  I wrapped all of the calls in a criticalsection and it helped some, At this point I am going to eliminate Cross talk and replace the calls with an http call through indy.

[kudzu]

CrossTalk is not your problem. CrossTalk is used in many very high load environments safely.

There is likely a threading issue in your code and replacing CrossTalk alone will not solve your issue and unless you have other reasons to do so will just be busy work and a distraction.

Wrapping all the calls in a CriticalSection highlights this and they will really slow down your application when its under load if they are use so liberally.