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From "Allistair Crossley" <Allistair.Cross...@QAS.com>
Subject RE: Why is tomcat (java) so memory intensive?
Date Tue, 21 Dec 2004 15:59:45 GMT
you are right, tomcat 5.0.19 did have a memory leak. some dispute it, but it is there, i had
it also and used a profiler to show it. you should upgrade to 5.0.28.

Allistair.

> -----Original Message-----
> From: Philippe Deslauriers [mailto:deslauriers@beetext.com]
> Sent: 21 December 2004 15:47
> To: Tomcat Users List; christoph@kutzinski.de
> Subject: RE: Why is tomcat (java) so memory intensive?
> 
> 
> 
> Actually no, I tough it was 256Mb. Thanks.
> It will go out of memory around 125Mb 140Mb in the task 
> manager. It depends.
> 
> But your point just prove my problem to be even stanger: if 
> 64 Mb shoulb be
> the limit
> where did the other 60Mb+ go? (the JVM itself never takes 
> that much memory,
> not from my experience).
> 
> What I did not mention in the orgininal post is that I have 
> the same problem
> with an app running on 5.0.18 sam jdk, using -Xms256m 
> -Xmx1024m, it will
> also run OOM, and again profiling the app did not show any 
> leak, and a large
> gap between the total heap and whatever the task manger reports.
> 
> My main issue here is where does the gap come from?
> 
> 
> -----Original Message-----
> From: Christoph Kutzinski [mailto:kutzi@gmx.de]
> Sent: Tuesday, December 21, 2004 10:22 AM
> To: Tomcat Users List
> Subject: Re: Why is tomcat (java) so memory intensive?
> 
> 
> Philippe Deslauriers wrote:
> > I am using Tomcat 5.0.19 on Windows XP SP2, J2SDK 1.4.2_03.
> >
> > I have a serious memory problem with Tomcat, it just EAT 
> memory without
> > explanation, until OOM error occurs.
> >
> > The Java.exe process in the windows task manager reports 
> using between
> 95Mb
> > and 105Mb after the startup of the webapp. I do not use Xms 
> Xmx options in
> > dev mode.
> 
> You do know that the VM will only allocate 64 mb for heap if you don't
> use the Xmx option, do you?
> After the 64 mb are used up the vm will throw an oom error.
> How much memory does the taskmanager report before the oom 
> error happens?
> 
> 
> Christoph
> 
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