CODEWITHSUNDEEP
c#asp.netiis
Marcus Greenwood
Marcus Greenwood

Reputation: 65

ASP.NET random slow downs

We are experiencing random intermittent slow-downs in our ASP.NET application. Most pages take between 100-500ms to render (depending on which modules are used on the page). Occasionally however - perhaps 1 in 100 requests, these figures are more like 5000-10000ms. This is not a database related issue - I have checked for slow queries, and is not related to the complexity of the page - e.g. a page which takes 100ms is just as likely to take 10000ms when it slows down. I don't think the app-pool is recycling either - would normally see this in task manager. Could it possibly be GC? Any ideas? The w3wp application usually uses a steady 800MB-1GB of memory at all times.

Thanks Marcus

Upvotes: 1

Views: 2007

Answers (4)

mangokun
mangokun

Reputation: 5603

have you tried running your web application in in-proc session state mode, and see if there is any difference?

Upvotes: 0

Zhaph - Ben Duguid
Zhaph - Ben Duguid

Reputation: 26956

According to Tess Ferrandez, (ASP.NET Escalation Engineer) you're at that magic point on a 32bit server where you are likely to start seeing Out of Memory Exceptions - it's possible that this is having an affect too.

She has a number of useful posts on this topic:

  1. TechEd Resources
  2. Debugging Memory
  3. Debugging Memory Leaks

As others have also said, profilers, and tracing will also help.

Upvotes: 0

Jay S
Jay S

Reputation: 7994

Does the application use the Cache at all for maintaining a large piece of static data? Even if the app-pool is not recycling, it's possible that some large objects in cache are being expired and then the next hit that requires that Cache has to refill it.

Upvotes: 0

Andrew Hare
Andrew Hare

Reputation: 351456

The best thing I can tell you to do is to attach a profiler (search this site for a good .NET profiler, I personally use ANTS) to identify bottlenecks. Without good profile data all of our suggestions here will simply be speculation.

Upvotes: 2

Related Questions