红帽/ CentOS(x86)支持4GB或以上RAM（内存）

如果你有4 GB或更多的RAM使用Linux内核能够PAE的机器编译。 Your machine may not show up total 4GB ram.您的计算机可能不会显示在总4GB的内存。 All you have to do is install PAE kernel package.你所要做的就是安装PAE内核包。

This package includes a version of the Linux kernel with support for up to 64GB of high memory.这个软件包包含了与高达64GB内存的高支持Linux内核版本。 It requires a CPU with Physical Address Extensions (PAE).它需要与物理地址扩展（PAE）的CPU。
The non-PAE kernel can only address up to 4GB of memory.非PAE内核，只能针对高达4GB的内存。 Install the kernel-PAE package if your machine has more than 4GB of memory (>=4GB).安装kernel - PAE的包，如果您的机器以上的内存（“= 4GB的）4GB的。

 

我要如何安装PAE内核？

To install PAE kernel, use yum command:要安装PAE内核，使用yum命令：
# yum install kernel-PAE
Output:输出：

 Loading "installonlyn" plugin载入“installonlyn”插件 
 Setting up Install Process设置安装过程 
 Setting up repositories设置库 
 Reading repository metadata in from local files读取本地文件的元数据仓库 
 Parsing package install arguments分析软件包安装参数 
 Resolving Dependencies解决依赖 
 --> Populating transaction set with selected packages. - “填充交易与选择的软件包集。 Please wait.请稍候。 
 ---> Downloading header for kernel-PAE to pack into transaction set. ---“下载的内核头，PAE的打包到事务集。 
 kernel-PAE-2.6.18-8.1.15.内核的PAE 2.6.18 - 8.1.15。 100% |=========================| 207 kB    00:00 100％|=========================| 207 kB 00:00 
 ---> Package kernel-PAE.i686 0:2.6.18-8.1.15.el5 set to be installed ---“包kernel - PAE.i686 0:2.6.18-8.1.15。EL5电池安装一套 
 --> Running transaction check - “运行的事务检查 

 Dependencies Resolved依存关系解析 

 ============================================================================= ================================================== =========================== 
  Package                 Arch       Version          Repository        Size包拱版本库大小 
 ============================================================================= ================================================== =========================== 
 Installing:安装： 
  kernel-PAE              i686       2.6.18-8.1.15.el5  updates            12 M内核PAE的i686 2.6.18 - 8.1.15.el5更新的12个M 

 Transaction Summary交易综述 
 ============================================================================= ================================================== =========================== 
 Install      1 Package(s)安装1包（拧） 
 Update       0 Package(s)更新0包（拧） 
 Remove       0 Package(s)删除0包（拧）          

 Total download size: 12 M总下载大小：12米 
 Is this ok [y/N]: y这是确定[是/否]：年月 
 Downloading Packages:下载软件包： 
 (1/1): kernel-PAE-2.6.18- 100% |=========================|  12 MB    00:12 （1 / 1）：内核的PAE 2.6.18 - 100％|=========================| 12 MB的00:12 
 Running Transaction Test交易运行测试 
 Finished Transaction Test成品交易测试 
 Transaction Test Succeeded交易测试成功 
 Running Transaction运行交易 
   Installing: kernel-PAE                   ######################### [1/1]安装：内核PAE的######################### [1 / 1]  

 Installed: kernel-PAE.i686 0:2.6.18-8.1.15.el5安装：内核PAE.i686 0:2.6.18-8.1.15。EL5电池 
 Complete!完成！ 

Just reboot the server and make sure you boot with PAE kernel ie 2.6.18-8.1.15.el5PAE:只要重新启动服务器，并确保您启动即与PAE内核2.6.18 - 8.1.15.el5PAE：
# reboot