Hi - I  have been working for some time on a portal hosted on Oracle and DNN 4.3.5 and struggling with performance.  In our case I have identified 2 causes:

1) Slow startup - the site is not widely used at the moment as it's in testing.  The first time the site is hit after a period of inactivity it takes a long time to fire up - not great from the clients point of view.  We fixed by using a text browser to poll the site periodically.
2) CPU pegged at 100% and long waits when IE hits the site - I develop using Firefox so didn't see the reason for the client's performance complaints for a while.  It turns out that there is some interaction between the line:
    <meta http-equiv="PAGE-ENTER" content="RevealTrans(Duration=0,Transition=1)">
and the included JavaScript files.  I haven't worked through all the details yet but by commenting out the above line in the default.aspx file I now have a site that performs as you would wish.

I don't understand the reason for the RevealTrans filter, removing it seems to have had no noticable effect on the site other than that there is no wait for the page to load.  Putting it back in means waits of up to 10 minutes running IE 6 (but not 7) even on a moderately fast machine.

Has anyone else hit the problem?  Does anyone understand what is going on?  Have I fixed a problem or broken something else???

Thanks.

Your first item is something that is unavoidable with ASP.NET due to the worker process unloading after a specific amount of inactivity.

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-Mitchel Sellers
Microsoft MVP, ASPInsider, DNN MVP
CEO/Director of Development - IowaComputerGurus Inc.


Visit mitchelsellers.com for my mostly DNN Blog and support forum.

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Thanks - we figured this out in the end.  I felt that by mentioning it here it may save others the pain of having to figure it out for themselves and find a solution.