Q: Are you running the JVM with -server?
Q: Could it be a garbage collection related problem? If it's happening at
odd times when heap usage is up, it might be gc collecting old jdbc objects?
-mike
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Aaron
> Tavistock
> Sent: Monday, March 26, 2001 1:09 PM
> To: Orion-Interest
> Subject: Performance problems...
>
>
> I've been working on getting Orion running in a production
> environment for a
> little while now and just when I thought everything was working
> fine I go to
> push to production and something load/volume related is creating massive
> slowdowns.
>
> Basically every 250 database accesses or so there is a long pause
> (20 to 60
> second), where nothing occurs. During this pause the CPU load *drops* to
> practically nothing and our entire site is frozen. I'm not sure exactly
> where the problem exists; it could be our code, our
> configuration, or even a
> bug in Orion.
>
> The environment is Redhat 6.2, JDK1.3, Oracle 8i. Its a pure
> J2EE app, but
> we're not using EJB. I initially thought it might be a memory issue, but
> I've played with the JDK heap size and carefully watched memory
> utilization
> and thats also not the issue. I even considered that maybe
> Evermind/IronFlare might have a throttle (to push you to get a
> license) so I
> put one of our production licenses on the QA box.
>
> I've since gotten a load tester and can reproduce the problem. Oddly, it
> only happens on pages which require database access. Even more
> interesting
> is that it occurs more frequently on pages which utilize more than one
> connection. But thats about as far as I can narrow it. I've tried the
> 8.15 and 8.17 type4 jdbc drivers from oracle and we've tried Oracles
> ConnectionCacheImpl and Orions XADataSource implimentation, both show the
> same behavior (though both are using the Oracle Driver). I've also tried
> Orions jdbc debug and it shows nothing of interest.
>
> So far I've put about a week straight into finding it, and I've just about
> run out of ideas. I'd really be appreciative if anyone has any good
> suggestions on where to look. ANyone seen behavior like this before?
>
>
