RHEL / CentOS Support 4GB or more RAM ( memory )

# uname -r
# yum info kernel-PAE
Available Packages
Name   : kernel-PAE
Summary: The Linux kernel compiled for PAE capable machines.
This package includes a version of the Linux kernel with support for up to
64GB of high memory. It requires a CPU with Physical Address Extensions (PAE).

The non-PAE kernel can only address up to 4GB of memory.

Install the kernel-PAE package if your machine has more than 4GB of memory.

# yum install kernel-PAE

Loading “installonlyn” plugin
Setting up Install Process
Setting up repositories
Reading repository metadata in from local files
Parsing package install arguments
Resolving Dependencies
–> Populating transaction set with selected packages. Please wait.
—> Downloading header for kernel-PAE to pack into transaction set.
kernel-PAE-2.6.18-8.1.15. 100% |=========================| 207 kB    00:00
—> Package kernel-PAE.i686 0:2.6.18-8.1.15.el5 set to be installed
–> Running transaction check

Dependencies Resolved

Package                 Arch       Version          Repository        Size
kernel-PAE              i686       2.6.18-8.1.15.el5  updates            12 M

Transaction Summary
Install      1 Package(s)
Update       0 Package(s)
Remove       0 Package(s)

Total download size: 12 M
Is this ok [y/N]: y
Downloading Packages:
(1/1): kernel-PAE-2.6.18- 100% |=========================|  12 MB    00:12
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing: kernel-PAE                   ######################### [1/1]

Installed: kernel-PAE.i686 0:2.6.18-8.1.15.el5

Chu y:
Sau khi da install xong kernel PAE cac ban chinh sua mot chut trong file /etc/grub.conf
de lua chon kernel PAE vua install.
#vi /etc/grub.conf

# grub.conf generated by anaconda
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/sda3
#          initrd /initrd-version.img
title CentOS (2.6.18-128.1.16.el5PAE)
root (hd0,0)
kernel /vmlinuz-2.6.18-128.1.16.el5PAE ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.18-128.1.16.el5PAE.img
title CentOS (2.6.18-128.1.14.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-128.1.14.el5 ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.18-128.1.14.el5.img
title CentOS (2.6.18-53.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-53.el5 ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.18-53.el5.img

Ban se chon gia tri default=0 do la kernel 2.6.18-128.1.16.el5PAE ma chung ta vua install vao.
Luu lai file thiet lap.Reboot la ok

Enjoy it

Cu Tí

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