physical memory support under RHEL for Opteron

[Rick Stevens]

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).
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- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-           Denial.  It ain't just a river in Egypt anymore!         -
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