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Old 12-12-2004, 12:58 AM   #1
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Registered: Aug 2004
Location: Calcutta, India
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Smile 2 GB Ram and redhat 9

Will Redhat 9 support a 2 GB RAM? We are having problems installing Redhat 9 with 2 GB RAM. It is okay with 1 GB.
This will be used in a small cluster with Beowulf (Oscar).
If Redhat is not possible could anyone suggest an alternative (other than Enterprise).
Old 12-14-2004, 04:37 PM   #2
Registered: Feb 2002
Location: Grenoble
Distribution: Debian
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If I remember correctly, you can choose a kernel with support for more memory. Have you tried it?
Old 12-14-2004, 05:12 PM   #3
Registered: Oct 2003
Location: Planet Earth
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In the 2.4.x series of the kernel, it's under Processor type and features ---> High Memory Support

Linux can use up to 64 Gigabytes of physical memory on x86 systems.
However, the address space of 32-bit x86 processors is only 4
Gigabytes large. That means that, if you have a large amount of
physical memory, not all of it can be "permanently mapped" by the
kernel. The physical memory that's not permanently mapped is called
"high memory".

If you are compiling a kernel which will never run on a machine with
more than 960 megabytes of total physical RAM, answer "off" here (default
choice and suitable for most users). This will result in a "3GB/1GB"
split: 3GB are mapped so that each process sees a 3GB virtual memory
space and the remaining part of the 4GB virtual memory space is used
by the kernel to permanently map as much physical memory as

If the machine has between 1 and 4 Gigabytes physical RAM, then
answer "4GB" here.

If more than 4 Gigabytes is used then answer "64GB" here. This
selection turns Intel PAE (Physical Address Extension) mode on.
PAE implements 3-level paging on IA32 processors. PAE is fully
supported by Linux, PAE mode is implemented on all recent Intel
processors (Pentium Pro and better). NOTE: If you say "64GB" here,
then the kernel will not boot on CPUs that don't support PAE!

The actual amount of total physical memory will either be auto
detected or can be forced by using a kernel command line option such
as "mem=256M". (Try "man bootparam" or see the documentation of your
boot loader (grub, lilo or loadlin) about how to pass options to the
kernel at boot time.)

If unsure, say "off".


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