centos 5.x系统大内存识别方法

新的服务器,内存给折腾了很久,8500E和10600R不能混用,换10600E后,共加上8G内存,但只识别3.2G,
网上查询后发现是要升级32位的内核补丁,方法如下:

# yum install kernel-PAE
# vi /boot/grub/grub.conf

如果看到如下代码 代表PAE内核已经安装好了
title CentOS (2.6.18-8.1.4.el5PAE)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-8.1.4.el5PAE ro root=LABEL=/
        initrd /initrd-2.6.18-8.1.4.el5PAE.img
修改设置为默认启动
default=0

# reboot


同时要进BIOS设置保存一下。free -m 显示8G.完成

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