On Unix you can also use the "truss" command to attach to a running process (check Google for examples). I used this technique on a web application and discovered that a file with *static* content was being opened 1,000 times per hour by the application. Before I showed up at the company, everybody was working on NT and basically hated Unix, so the problem went undiscovered for close to four years. AFAIK, most (all?) of the Java-based tools would not detect this sort of problem. I don't think "truss" is available on NT, even with the MKS (or equivalent) package. For people who are on NT and are experiencing problems with their Java-based web- application, I would strongly recommend setting up a Unix environment to perform truss-based testing (even if you need to hire a contractor to set up everything). It's really quite amazing what "truss" can uncover:) Cordially, Oswald
Edson Alves Pereira <[EMAIL PROTECTED]> wrote: JProfiler is the best for this job, there are examples to show you how bind JProfiler to tomcat ( www.jprofiler.com ), its pretty easy to handle this tool. > ---------- > De: Allistair Crossley[SMTP:[EMAIL PROTECTED] > Responder: Tomcat Users List > Enviada: quinta-feira, 8 de janeiro de 2004 8:58 > Para: Tomcat Users List > Assunto: RE: Tomcat OutOfMemory at 158MB - Not reclaiming any memory > overnight > > Yes I would like to profile my application....but do you have any tips on > how to do this or where to start? > > Thanks > > -----Original Message----- > From: Edson Alves Pereira [mailto:[EMAIL PROTECTED] > Sent: 08 January 2004 12:49 > To: 'Tomcat Users List' > Subject: RE: Tomcat OutOfMemory at 158MB - Not reclaiming any memory > overnight > > > In my opnion, is better instead of increasing memory of tomcat JVM > try to profile your application. I´m sure if tomcat complain about memory, > your servlets have something wrong. > > > ---------- > > De: Francois > JEANMOUGIN[SMTP:[EMAIL PROTECTED] > > Responder: Tomcat Users List > > Enviada: quinta-feira, 8 de janeiro de 2004 7:31 > > Para: Tomcat Users List > > Assunto: RE: Tomcat OutOfMemory at 158MB - Not reclaiming any memory > > overnight > > > > > > > > > -----Original Message----- > > > The other day Tomcat threw an OutOfMemoryException. This is our > > > development version of Tomcat. Looking at the Windows processes > revealed > > > Tomcat at 158MB. > > > > Let me do some divination. You are using a SUN Jvm, with no Xms nor Xmx > > parameter. So, the memory allocated to your applications is 64MB > > (default). 158 is a good value reflecting the size of the VM plus the > size > > allocated to your applications. > > > > If your application needs more memory, try to path -Xmx=128m -Xms=128m > to > > your startup scripts. > > > > Hope this helps, > > > > François (Oraculum). > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > ------------------------------------------------------- > QAS Ltd. > Developers of QuickAddress Software > www.qas.com > Registered in England: No 2582055 > Registered in Australia: No 082 851 474 > ------------------------------------------------------- > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------- Do you Yahoo!? Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes
