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Posted to users@tomcat.apache.org by Jean-Pierre Astier <jp...@janvier.fr> on 2007/11/26 16:51:41 UTC
Increase JAVA Heap size when Tomcat start
Hello all,
I want to use a J2ee application (Magnolia), but I need to increase
the java heap size when tomcat (5.5.25) start.
What is the solution ?
Thanks
Jean-Pierre
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RE: is there a limit to JAVA Heap size ?
Posted by "Baron, Bob (LNG-HBE)" <Bo...@lexisnexis.com>.
First of all, this is a JRE issue, not Tomcat!
Depending on your Operating system (Windows, *nix, etc.), whether it's a
32 or 64 bit version, and what JRE you're using, the limit is different.
You can get pretty good info from you JRE vendor about how it uses
memory - Sun has several good articles on it - especially how they
relate to Garbage Collection.
Under 32 bit Windows, the JRE process is limited to 2 GB of total memory
- including the memory that the JRE needs other than the heap controlled
by the -Xmx setting.
The practical limit is about 1250 MB for 32-bit Windows with a 1.5 or
1.6 Sun JRE. The limit for 64-bit Windows is insanely high - I hope to
not ever reach it in my lifetime!
Whatever your environment, a little trial-and-error can be used. Simply
run something like 'java -Xmx2048M foo'. This is trying to set it to
2GB. Change the numeric value up and down to find out what your limit
is. The Sun JRE gives an error about allocating the memory before
worrying about not finding foo.
-----Original Message-----
From: mgainty@hotmail.com [mailto:mgainty@hotmail.com]
Sent: Monday, November 26, 2007 12:12 PM
To: Tomcat Users List
Subject: Re: is there a limit to JAVA Heap size ?
Microsoft allows 3GB capability for User Process Address Space
http://www.microsoft.com/technet/sysinternals/information/bootini.mspx
Anyone else?
M--
----- Original Message -----
Wrom: UZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPB
To: "Tomcat Users List" <us...@tomcat.apache.org>
Sent: Monday, November 26, 2007 12:08 PM
Subject: Re: is there a limit to JAVA Heap size ?
> Jean,
>
> I am not a Tomcat Expert, though I know you can set this value to a
> higher number. I have set once to 1GB.
>
> Perhaps the gurus on the forum would answer it clearly to you.
>
> HTH<
>
> Bruno
>
> On Nov 26, 2007 3:06 PM, Jean-Pierre Astier <jp...@janvier.fr>
wrote:
> > Hello,
> >
> > An other little question !!!
> >
> > Is there a limit to the java heap size var environment ?
> >
> > There is 3 GB off RAM on my server.
> >
> > I've set JAVA_OPTS to -Xms512m -Xmx512m in catalina.sh.
> >
> > Can I increase more than this value ?
> >
> > Thanks
> >
> >
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> > To start a new topic, e-mail: users@tomcat.apache.org
> > To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> > For additional commands, e-mail: users-help@tomcat.apache.org
> >
> >
>
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>
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Re: is there a limit to JAVA Heap size ?
Posted by mg...@hotmail.com.
Microsoft allows 3GB capability for User Process Address Space
http://www.microsoft.com/technet/sysinternals/information/bootini.mspx
Anyone else?
M--
----- Original Message -----
Wrom: UZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNKMBIPB
To: "Tomcat Users List" <us...@tomcat.apache.org>
Sent: Monday, November 26, 2007 12:08 PM
Subject: Re: is there a limit to JAVA Heap size ?
> Jean,
>
> I am not a Tomcat Expert, though I know you can set this value to a
> higher number. I have set once to 1GB.
>
> Perhaps the gurus on the forum would answer it clearly to you.
>
> HTH<
>
> Bruno
>
> On Nov 26, 2007 3:06 PM, Jean-Pierre Astier <jp...@janvier.fr> wrote:
> > Hello,
> >
> > An other little question !!!
> >
> > Is there a limit to the java heap size var environment ?
> >
> > There is 3 GB off RAM on my server.
> >
> > I've set JAVA_OPTS to -Xms512m -Xmx512m in catalina.sh.
> >
> > Can I increase more than this value ?
> >
> > Thanks
> >
> > ---------------------------------------------------------------------
> > To start a new topic, e-mail: users@tomcat.apache.org
> > To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> > For additional commands, e-mail: users-help@tomcat.apache.org
> >
> >
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
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Re: is there a limit to JAVA Heap size ?
Posted by Bruno Vilardo <br...@gmail.com>.
Jean,
I am not a Tomcat Expert, though I know you can set this value to a
higher number. I have set once to 1GB.
Perhaps the gurus on the forum would answer it clearly to you.
HTH<
Bruno
On Nov 26, 2007 3:06 PM, Jean-Pierre Astier <jp...@janvier.fr> wrote:
> Hello,
>
> An other little question !!!
>
> Is there a limit to the java heap size var environment ?
>
> There is 3 GB off RAM on my server.
>
> I've set JAVA_OPTS to -Xms512m -Xmx512m in catalina.sh.
>
> Can I increase more than this value ?
>
> Thanks
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
---------------------------------------------------------------------
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is there a limit to JAVA Heap size ?
Posted by Jean-Pierre Astier <jp...@janvier.fr>.
Hello,
An other little question !!!
Is there a limit to the java heap size var environment ?
There is 3 GB off RAM on my server.
I've set JAVA_OPTS to -Xms512m -Xmx512m in catalina.sh.
Can I increase more than this value ?
Thanks
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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Re: Increase JAVA Heap size when Tomcat start
Posted by Jean-Pierre Astier <jp...@janvier.fr>.
Thanks ben, all is ok now !!!!
jp
Le 26 nov. 07 à 16:58, ben short a écrit :
> Look at the catalina.bat or catalina.sh specifically at the JAVA_OPTS
> environment var
>
> On Nov 26, 2007 3:51 PM, Jean-Pierre Astier <jp...@janvier.fr>
> wrote:
>> Hello all,
>>
>> I want to use a J2ee application (Magnolia), but I need to increase
>> the java heap size when tomcat (5.5.25) start.
>>
>> What is the solution ?
>>
>> Thanks
>>
>> Jean-Pierre
>>
>> ---------------------------------------------------------------------
>> To start a new topic, e-mail: users@tomcat.apache.org
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
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Re: Increase JAVA Heap size when Tomcat start
Posted by ben short <ja...@gmail.com>.
Look at the catalina.bat or catalina.sh specifically at the JAVA_OPTS
environment var
On Nov 26, 2007 3:51 PM, Jean-Pierre Astier <jp...@janvier.fr> wrote:
> Hello all,
>
> I want to use a J2ee application (Magnolia), but I need to increase
> the java heap size when tomcat (5.5.25) start.
>
> What is the solution ?
>
> Thanks
>
> Jean-Pierre
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
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