Groups > comp.lang.java.programmer > #20432

Re: 32G ram

From	Nigel Wade <nmw@ion.le.ac.uk>
Newsgroups	comp.lang.java.programmer
Subject	Re: 32G ram
Date	2012-12-18 09:19 +0000
Message-ID	<ajaqpnFttk0U1@mid.individual.net> (permalink)
References	<7f80256a-03d0-4ecd-b20f-164547e4f573@googlegroups.com> <50ce8cd7$0$287$14726298@news.sunsite.dk> <sa23q9-rkb.ln1@tempest.fredriksson.dy.fi>

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On 17/12/12 08:39, Donkey Hottie wrote:
> 17.12.2012 05:09, Arne Vajhøj kirjoitti:
>> On 12/16/2012 10:05 PM, mcheung63@gmail.com wrote:
>>>      i got 32GB ram, why i can't -Xmx2G, it got an error "Could not
>>> create the Java Virtual Machine"
>>>
>>> /root>free -m
>>>                total       used       free     shared    buffers
>>> cached
>>> Mem:         32387      16973      15413          0        243      11906
>>> -/+ buffers/cache:       4823      27563
>>> Swap:         1906          0       1906
>>> /root>uname -a
>>> Linux localhost.localdomain 3.6.9-2.fc17.i686.PAE #1 SMP Tue Dec 4
>>> 14:15:28 UTC 2012 i686 i686 i386 GNU/Linux
>>
>> 32 bit or 64 bit Java?
>>
>> Arne
>>
>>
>
> Apparently 32 bit, as the i686 OS is 32 bit PAE too.
>

32bit Java on 32bit Linux should allow an application of up to 4GB. How 
much can of that can be allocated to the heap depends on the particular 
application. I've allocated more than 2G to heap on a 32bit Linux 
system, see this old thread on Google Groups:
https://groups.google.com/forum/?hl=en-GB&fromgroups=#!topic/comp.lang.java.programmer/iGr3bxL9ZCA

There may be a per-process limit. Try "ulimit -a" to see what limits the 
sysadmin has set.

-- 

Nigel Wade

Thread

32G ram mcheung63@gmail.com - 2012-12-16 19:05 -0800
  Re: 32G ram Arne Vajhøj <arne@vajhoej.dk> - 2012-12-16 22:09 -0500
    Re: 32G ram Donkey Hottie <donkey@fredriksson.dy.fi> - 2012-12-17 10:39 +0200
      Re: 32G ram Arne Vajhøj <arne@vajhoej.dk> - 2012-12-17 17:37 -0500
        Re: 32G ram Lew <lewbloch@gmail.com> - 2012-12-17 15:38 -0800
      Re: 32G ram Nigel Wade <nmw@ion.le.ac.uk> - 2012-12-18 09:19 +0000
        Re: 32G ram BGB <cr88192@hotmail.com> - 2012-12-18 14:57 -0600
        Re: 32G ram Arne Vajhøj <arne@vajhoej.dk> - 2012-12-18 20:22 -0500
          Re: 32G ram Nigel Wade <nmw@ion.le.ac.uk> - 2012-12-19 11:28 +0000
            Re: 32G ram BGB <cr88192@hotmail.com> - 2012-12-19 07:19 -0600
            Re: 32G ram Arne Vajhøj <arne@vajhoej.dk> - 2012-12-19 09:17 -0500
              Re: 32G ram Tim Slattery <Slattery_T@bls.gov> - 2012-12-19 12:51 -0500
                Re: 32G ram Arne Vajhøj <arne@vajhoej.dk> - 2012-12-19 13:20 -0500
                Re: 32G ram BGB <cr88192@hotmail.com> - 2012-12-19 12:40 -0600
                Re: 32G ram Arne Vajhøj <arne@vajhoej.dk> - 2012-12-19 13:56 -0500
  Re: 32G ram Roedy Green <see_website@mindprod.com.invalid> - 2012-12-17 00:31 -0800
    Re: 32G ram Arne Vajhøj <arne@vajhoej.dk> - 2012-12-17 20:37 -0500
  Re: 32G ram Sven Köhler <remove-sven.koehler@gmail.com> - 2012-12-19 20:40 +0100

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