Hi Leon, Thanks for your suggestion and sorry for responding so late. I had to take a break from this issue at least for a day. I had been working on this for 3 days in a row and barely sleeping at night, because of the crashes. As soon as I saw my installation not crashing, I needed to take a rest.
I'm already using www.YourKit.com for now. It is not free, I guess I will not buy it finally if I totally solve my problem. But for now, while in the trial period, I'm using it and it is great! But as soon as it ends, I will definitely try Jmap/Jhat as you suggested. > -----Original Message----- > From: Leon Rosenberg [mailto:rosenberg.l...@gmail.com] > Sent: Friday, November 12, 2010 04:27 PM > To: Tomcat Users List > Subject: Re: Tomcat 6.0.29 using more and more RAM until it collapses? > > Hello Brian, > > maybe I missed half of the communication, but from the other half I got the > feeling that you are shooting in the dark. Heap dumps are hard to decipher > especially if the internals seems to be unknown ;-) When hunting a memory leak > I setup a cron job that performs the same task once an hour: > jmap -heap:live <pid> >file-with-timestamp.heap jmap -histo:live <pid> >file- > with-timestamp.histo > > the jmap histogramm contains all objects in your vm and their cumulated space. > by comparing two of them taken in 30 or 60 minutes you can determine which > objects are actually increasing numbers or size. With that knowledge analyzing > heap dumps can be performed much faster and easier. > > Keep in mind that analyzing mem leaks that lead to outofmemory after the > oome occured is twice as hard as shortly before . > > regards > Leon > > P.S. I have a small tool that creates a diff of two subsequent histograms, i can > share it if you need it. > > P.P.S. jmap is a standart java tool. Another standart java tool - jhat can > theoretically analyze a heap dump based on a baseline heapdump taken > previously. > > > On Fri, Nov 12, 2010 at 9:44 PM, Caldarale, Charles R > <chuck.caldar...@unisys.com> wrote: > >> From: Brian [mailto:bbprefix-m...@yahoo.com] > >> Subject: RE: Tomcat 6.0.29 using more and more RAM until it collapses? > > > >> Now I also see that 160MB are being used by > >> org.apache.jasper.runtime.BodyContextImpl. > > > > There are a couple of system properties you can set to control this: > > > > org.apache.jasper.runtime.JspFactoryImpl.USE_POOL > > org.apache.jasper.runtime.JspFactoryImpl.POOL_SIZE > > > > Look here for the doc: > > http://tomcat.apache.org/tomcat-6.0-doc/config/systemprops.html > > > > - Chuck > > > > > > THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE > PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If > you received this in error, please contact the sender and delete the e-mail and its > attachments from all computers. > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > > For additional commands, e-mail: users-h...@tomcat.apache.org > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
