Over the last 2 years, I've done a lot of testing with tomcat4 and 5 on linux, windows and solaris.
A clean tomcat install on a X1 rackmount running solaris 9 does not exhibit this kind of behavior. where there's no load on the system, the java process is typically below 1%. As other's have stated, try running tomcat5 without your webapp to see if the same CPU usage occurs. if it doesn't, most likely it's your webapp. In past, I've seen odd behavior as a result of automated deployment. For example, at a previous job, we had a script that packs the app and uploads it to the production server. Once the file is uploaded, it unpacks the files. that all went fine, except that gunzip didn't produce a timestamp. Which meant everytime a request was made to tomcat, it recompiled the jsp. Our fix was to have the upload script touch the files, so they have a timestamp. in my case, the problem of slow performance and high CPU usage was caused by gunzip. there might be something very simple causing your high CPU usage which has nothing to do with Tomcat. I hope that helps. peter On Fri, 25 Jun 2004 13:04:15 +0100, Peter Guyatt <[EMAIL PROTECTED]> wrote: > > Hi There, > > Have you tried just running Tomcat without you web application. > > It could be configuration? > > I think TC5 has extra configuration files, maybe its a configuration issue. > > Thanks > > Pete > > > -----Original Message----- > From: David Parfitt [mailto:[EMAIL PROTECTED] > Sent: 25 June 2004 12:50 > To: Tomcat Users List > Subject: RE: TC5 / Solaris CPU usage > > No luck. Same results. > > Cheers- > Dave > > --- Peter Guyatt <[EMAIL PROTECTED]> > wrote: > > Hi There, > > > > Try running in client mode. > > > > Thanks > > > > Pete > > > > -----Original Message----- > > From: David Parfitt [mailto:[EMAIL PROTECTED] > > Sent: 25 June 2004 11:33 > > To: Tomcat Users List > > Subject: RE: TC5 / Solaris CPU usage > > > > > > I've tried 5.0.25 - same results + other non-related > > issues so we ended up > > sticking > > with 5.0.16. > > > > Cheers - > > Dave > > > > > > "Dale, Matt" <[EMAIL PROTECTED]> wrote: > > > > We use tomcat 5 on solaris 9 without this problem. > > Have you considered > > upgrading to the latest stable release 5.0.25? > > > > Ta > > Matt > > > > -----Original Message----- > > From: David Parfitt [mailto:[EMAIL PROTECTED] > > Sent: 24 June 2004 22:40 > > To: [EMAIL PROTECTED] > > Subject: TC5 / Solaris CPU usage > > > > > > Hi - > > I'm having a problem using Tomcat 5.0.16 on Solaris > > 9. > > We've just upgraded to Tomcat 5 from 4.x and are > > having a problem > > with CPU usage. After we start our app, the CPU > > load goes to 50% and never goes below this number. > > Does anyone else have any experience with this > > problem? > > Running truss shows that Java is in a tight loop > > doing a yield(). > > (We don't have any code that uses threads outside of > > the Tomcat > > code, and we aren't in an infinite loop anywhere). > > > > We are using: > > java version "1.4.2_04" > > Java(TM) 2 Runtime Environment, Standard Edition > > (build 1.4.2_04-b05) > > Java HotSpot(TM) Client VM (build 1.4.2_04-b05, > > mixed mode) > > > > JAVA_OPTS="-server -Xms300m -Xmx1000m" > > export JAVA_OPTS > > > > I've also tried using these in JAVA_OPTS: > > -Xconcurrentio -Xincgc > > > > SunOS foo 5.9 Generic_112233-11 sun4u sparc > > SUNW,Sun-Fire-280R > > > > Any help would be greatly appreciated! > > > > Cheers - > > Dave > > > > > > --------------------------------- > > Do you Yahoo!? > > Yahoo! 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