 | | | physical memory support under RHEL for Opteron | physical memory support under RHEL for Opteron 2004-03-31 - By Guy Rouillier
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On Wed, 31 Mar 2004 11:52:32 -0800
Rick Stevens <rstevens@(protected) > wrote:
>Chiu, PCM (Peter) wrote:
> >
> > Hi,
> >
> > I am just about to order an dual Opteron 248 server to run under RHEL AS.
> >
> > I would like to double check the physical memory supported - we are getting
> > 8 x 2GB PC3200 or PC2700 memory on this server.
> >
> > I have found something a bit obscure on the RH web page:
> > ___
http://www.redhat.com/software/rhel/as/_
> >
> > in that it said:
> >
> > **** 64GB is the maximum memory size for X86 systems. Maximum memory
> > sizes vary with other architectures.
> >
> > Can anyone confirm
> > a. the maximum memory size for Opterons supported, and
> > b. the maximum usable physical memory per process on user applications
>
>As I understand it, RHEL AS3 is available only as an x86 package (in
>other words, 32-bit). As such, it is limited to the same 64GB limit as
>any 32-bit OS. The per-process limit is 2^32 bytes (4GB).
We just got this at work in order to run an AMD64 version of Oracle. See the following: RH makes an AMD64-specific version of AS3, which is 64-bit. Something is strange about the chart on that page, as they claim 64 GB on x86 but on 16 GB on AMD64. How can you get > 4 GB physical memory on 32-bit hardware? Are they talking about Intel 's PAE?
http://www.redhat.com/software/rhel/configuration/
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>- Rick Stevens, Senior Systems Engineer rstevens@(protected) -
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>- Denial. It ain 't just a river in Egypt anymore! -
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Guy Rouillier
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