LinuxQuestions.org
Register a domain and help support LQ
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 12-12-2004, 01:58 AM   #1
Chandrika
LQ Newbie
 
Registered: Aug 2004
Location: Calcutta, India
Posts: 2

Rep: Reputation: 0
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).
Thanks!
CV
 
Old 12-14-2004, 05:37 PM   #2
Mara
Moderator
 
Registered: Feb 2002
Location: Grenoble
Distribution: Debian
Posts: 9,568

Rep: Reputation: 164Reputation: 164
If I remember correctly, you can choose a kernel with support for more memory. Have you tried it?
 
Old 12-14-2004, 06:12 PM   #3
DaHammer
Member
 
Registered: Oct 2003
Location: Planet Earth
Distribution: Slackware, LFS
Posts: 561

Rep: Reputation: 30
In the 2.4.x series of the kernel, it's under Processor type and features ---> High Memory Support
Quote:
CONFIG_NOHIGHMEM:

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
possible.

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".
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
REDHAT 9 SMP and more than 4GB RAM dukeoflinux Linux - Hardware 4 08-22-2007 11:33 PM
RedHat AS 3.0: Minimize memory(RAM) usage mhathi Linux - Newbie 0 11-02-2004 12:26 PM
How to check memory/RAm with Linux Redhat ctaylor199 Linux - General 2 10-07-2004 12:54 AM
Can Only Use 64Mb of Ram in Redhat 9 scott976 Linux - Newbie 1 10-28-2003 07:10 PM
Will upgrading my ram affect my redhat installation cyberswami Linux - Hardware 6 02-24-2003 09:35 PM


All times are GMT -5. The time now is 04:16 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration