Thanks for the info Howard. It's working out very well so far - very happy with 5.2.1.
Regards, Jim. -----Original Message----- From: Howard Lewis Ship [mailto:hls...@gmail.com] Sent: 03 November 2010 16:40 To: Tapestry users Subject: Re: Memory creep FYI: Using either jconsole of VisualVM you can force a GC remotely. In general, Tapestry is very good about memory management (though it likes to use a lot of it). There are a few user coding errors that can "trap" objects that should be reclaimed, but you have to work a bit hard to hit those. The biggest memory issue is the heavy use of PermGen space, especially under development. Java is very reticent about GC'ing PermGen, even when you request a GC explicitly. On Wed, Nov 3, 2010 at 6:29 AM, Jim O'Callaghan <jc1000...@yahoo.co.uk>wrote: > Thanks for the suggestions guys. Josh was right in that what I was seeing > was not a problem, just what I thought was a problem. I reduced my heap > from about 1.5GB down to 512MB and saw GC happening as expected and no OOMEs > with a moderate consistent load on the app. I think I got the idea that it > needed a lot of headroom from the dev environment, where production mode was > disabled, and live class reloading uses up a lot of space (I think), > otherwise the process was crashing with heap issues. Thiago, your > suggestion of using VisualVM was very helpful - a very good tool. It looks > like Tapestry (at least 5.2.1) is very good at releasing resources - my heap > size vs. used heap is consistently bouncing between predictable levels even > after running tests 24 hours over a few days. Very happy with the result. > Summary, the creep was me misinterpreting the heap growing because I gave > it so much headroom it never really needed to GC. > > Regards, > Jim. > > -----Original Message----- > From: Ivano Luberti [mailto:lube...@archicoop.it] > Sent: 03 November 2010 13:11 > To: users@tapestry.apache.org > Subject: Re: Memory creep > > and make sure you trap the exception that can be thrown > > Il 03/11/2010 14.02, p.stavrini...@albourne.com ha scritto: > >> can you give me some > >>> detail on how to go about that? > > Just invoke System.gc(); > > > > regards, > > Peter > > > > > > > > ----- Original Message ----- > > From: "Thiago H. de Paula Figueiredo" <thiag...@gmail.com> > > To: "Tapestry users" <users@tapestry.apache.org> > > Sent: Friday, 29 October, 2010 20:55:03 GMT +02:00 Athens, Beirut, > Bucharest, Istanbul > > Subject: Re: Memory creep > > > > On Fri, 29 Oct 2010 15:30:23 -0200, Josh Canfield < > joshcanfi...@gmail.com> > > wrote: > > > >>> but your suggestion of forcing garbage collection - can you give me > some > >>> detail on how to go about that? > >> > http://download.oracle.com/javase/6/docs/technotes/guides/management/jconsol e.html > > VisualVM (https://visualvm.dev.java.net/) has a very nice GUI for it. > > > > -- > ================================================== > dott. Ivano Mario Luberti > Archimede Informatica societa' cooperativa a r. l. > Sede Operativa > Via Gereschi 36 - 56126- Pisa > tel.: +39-050- 580959 > tel/fax: +39-050-9711344 > web: www.archicoop.it > ================================================== > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > For additional commands, e-mail: users-h...@tapestry.apache.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > For additional commands, e-mail: users-h...@tapestry.apache.org > > -- Howard M. Lewis Ship Creator of Apache Tapestry The source for Tapestry training, mentoring and support. Contact me to learn how I can get you up and productive in Tapestry fast! (971) 678-5210 http://howardlewisship.com --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
