Hi,

We have recently been experiencing a lack of performance from our Windows 2003 SP2 server.  It seems that every so often, two problematic DNN sites will both try to compete for CPU resources and thus slow down the entire server.  It's always one or the other or the combination of both at the same time.  We have tried several things to try and narrow down the problem...

-Upgraded the two problematic instances to DNN6 from DNN5
-Performed the optimization techniques/tips from Mitchell Sellers blog on one of the instances to see if it would make a difference
-Before we had this problem, we ran each of our sites in their own App pool.  We read somewhere that minimizing the number of app pools could have an effect so we distributed our sites into only 5 app pools.  Still the two problematic instances continued to misbehave.

What's puzzling is that we have lots of other DNN instances that run wonderfully.  One of them even being on DNN4!  We are led to believe that there is something going on with these two sites specifically.

I've heard of some 3rd party modules being the culprits in some cases.  The modules used in the problematic sites are also used in other instances and do not cause problems.

So how can we narrow this down?  Is there some kind of performance monitor for DNN that can log exactly what is occurring during those heavy workloads?  What else can be looked into? 

Any advice would be appreciated.

Thanks,
Chris

Thanks for this...

I will look into these.