Well, if the _server machine_ is running out of memory - I think Yourkit/Jprofiler or most java options won't help. Just make sure you do have the -Xmx option in tomcat - and it's reasonable ( less than 1/2 of total RAM I would guess ).
Java is very good at using -Xmx for the heap - I never seen it use more for the heap. You use Jprofiler if you see OutOfMemoryException or a lot of garbage collection. The non-heap in java is a different story - like any native code it's hard to predict or limit. I didn't see leaks (unless a bad JNI library is used ), but I never found any way to predict how much is needed to avoid swap ( typically the goal is to use all the memory in the server you can - but to never swap). Use the OS tools for that - I have no clue about XP, unix is simple ( top, etc ). Costin On Fri, Apr 11, 2008 at 5:30 AM, Henri Gomez <[EMAIL PROTECTED]> wrote: > you could activate jmxremove to track it in real time via JConsole : > > Add these to JAVA_OPTS : > > -Dcom.sun.management.jmxremote.port=8090 > -Dcom.sun.management.jmxremote=true > -Dcom.sun.management.jmxremote.authenticate=false > -Dcom.sun.management.jmxremote.ssl=false -Djava.awt.headless=true > > Also commercial products like Jprofiler are definitive good candidates > to track memory licks > > Regards > > 2008/4/11, Guenter Knauf <[EMAIL PROTECTED]>: > > > > Hi all, > > I've a prob with a Tomcat application. > > This is an app which was bought by a customer which I work for. > > The app runs on a plain WinXP box with nothing else installed on it but > only the Tomcat servive + MySQL server. The app is used through the > standalone http connector; Tomcat version is 5.5.25. > > Now since few days the box tends to crash with all memory exhausted... > > I cant tell at the moment if any component of the involved software > packages was updated recently. > > Now my question is: can someone give me some hints how I can observe the > memory consumption of Tomcat to see if there might be a leak either in Tomcat > self (saw some BZ, and ChangeLog entries that something was fixed with > 5.5.26), or also with their app? > > > > thanks in advance for any suggestions! > > > > greets, Guen. > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
