Slow performance with Oracle Portal

Hi everybody,
I'm using portal 3.0 , Oracle8i an linux SuSE 7.0 (P4 1.5GHz, RAM 512Mo)
I have a big problem, My site is very slow. We have only 30 end users.
For example when I want to connect to the site for a first time I get "this page can not be displayed.." after retrying many times it works. and for example when it is matter of sending an email (with smtp) the process is very slow and sometimes it doesn't even work.
I set the env-var OWS_ORAWEB_FEEDOMX=1, but no improvement
is any one having an idea of how to solve this problem...
thanks in advance

Thanks Justin. I tried what you suggested. Here's the findings:
1. increase prefetch count -- did not seem to make a significant difference;
2. tried MicroSoft ODBC driver -- See to be a little quicker, but still way slower than native SQLnet or Net8;
3. Use Oracle ODBC test instead of application -- Oracle ODBC test seem to restrict the max row retrieval to 100 rows -- but it still take 10 to 20 seconds, which means for 800 rows it will take the same amount of time. I checked the NT taskmanager, while retieving data there's no CPU consumption.
4. Installed Oracle to another machine in the same location on NT/wintel box. Response time ODBC vs SQLnet is comparable (50 msec or so) on 200 rows data retrieval. The production database is in DEC alpha machine running NT.
Based on all these testing, I am still not sure what might have caused the performance problem in production oracle. Any further suggestions?
null

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    Great news!
    I followed your suggestion, Noel, and uninstalled my drivers with the Catalyst Uninstall Utility (which I hadn't used before), rebooted, reinstalled Catalyst 13.2 Beta 7, rebooted, deleted the PS Prefs, started PS, and now the performance is radically improved!
    It baffles me why I would need to do a clean driver uninstall in a new system environment that has only ever had this video card, and is only a few months old, but that action seems to be what's improved the situation. Note that because I deleted the PS preferences, the good performance now occurs with the default Use Graphics Processor enabled, and Drawing Mode set to Advanced (with every feature in the Advanced dialog checked except 30bit display).
    Having no reference point, I can't tell for sure if performance is as good as it theoretically ought to be for my system specs, but using the standard 13px brush is only slightly laggy behind the cursor, even if I become reckless and squiggle on the canvas violently. It wasn't just sluggish response before: Photoshop seemed to be in pain trying to draw the line segments as it laboured to catch up to the cursor. That is pretty much gone now.
    Much more tellingly, zooming and panning the canvas is like it ought to be, responsive and clean, more or less like it was for me in CS4 with my old Nvidia 9600GT. The poor performance with zooming and panning was the most worrying aspect of the issue. It's a great relief to see these working more properly now.
    I have to confess I'm a little embarrassed to have drug you through all this hassle only to discover that something as rudimentary as properly cleaning out the drivers would be the apparent solution. I never would have imagined that doing that, with such a new and stable system, would make any difference, since I don't have a legacy of older drivers dotting my hard drive. In any event, I'm really grateful that you guys took the time to try to help me.
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