环境：centos5
确保系统已经安装好php-devel、autoconf、automake、m4、libtool、 gcc(预编译用） make(编译用）等软件，可使用rpm -q 软件包名查看，如未安装，使用yum -y install 软件包名进行安装。
eaccelerator官方网站：http://eaccelerator.net/
安装配置步骤如下：
1）下载源码包：本地下载地址：
[root@www.15099.net ~]#cd /usr/local/src
[root@www.15099.net ~]#wget http://bart.eaccelerator.net/source/0.9.5.3/eaccelerator-0.9.5.3.zip
2）解压源码包
[root@www.15099.net ~]#unzip eaccelerator-0.9.5.3.zip
[root@www.15099.net ~]#cd eaccelerator-0.9.5.3
3)利用phpize进行php程序的预处理
[root@www.15099.net ~]#phpize
4）预编译设置：
[root@www.15099.net ~]#./configure --enable-eaccelerator=shared --with-php-config=/usr/bin/php-config
5）编译：
[root@www.15099.net ~]#make
6）编译成功后安装
[root@www.15099.net ~]# make install
此时这个新编译的模块会被放置到/usr/lib/php/modules/eaccelerator.so中
7）修改php.ini和预先加载PHP模块
[root@www.15099.net ~]#vi /etc/php.ini
按shift+g键跳到配置文件的最末尾，加上以下配置信息：
[eaccelerator]
extension="eaccelerator.so"
eaccelerator.shm_size="16"
eaccelerator.cache_dir="/tmp/eaccelerator"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
eaccelerator.compress="1"
eaccelerator.compress_level="9"
预先加载php模块
[root@www.15099.net ~]#vi /etc/ld.so.conf
在文件尾添加
/usr/lib/php/modules
[root@www.15099.net ~]#ldconfig <--把模块导入高速缓存
8)建立eaccelerator的暂存数据
[root@www.15099.net ~]#mkdir /tmp/eaccelerator
[root@www.15099.net ~]#chmod 0777 /tmp/eaccelerator
9）使用ab命令测试一下网站效率，如下：
[root@www tmp]# ab -dkS -n100 -c100 http://localhost/phpinfo.php
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright 2006 The Apache Software Foundation, http://www.apache.org/
Benchmarking localhost (be patient).....done
Server Software: Apache
Server Hostname: localhost
Server Port: 80
Document Path: /phpinfo.php
Document Length: 48658 bytes
Concurrency Level: 100
Time taken for tests: 1.52041 seconds
Complete requests: 100
Failed requests: 1
(Connect: 0, Length: 1, Exceptions: 0)
Write errors: 0
Keep-Alive requests: 0
Total transferred: 4879895 bytes
HTML transferred: 4865795 bytes
Requests per second: 95.05 [#/sec] (mean)
Time per request: 1052.041 [ms] (mean)
Time per request: 10.520 [ms] (mean, across all concurrent requests)
Transfer rate: 4529.29 [Kbytes/sec] received
Connection Times (ms)
min avg max
Connect: 0 3 19
Processing: 423 647 1016
Total: 423 650 1035
10）重新apache和验证eAccelerator是否生效
[root@www.15099.net ~]# apachectl restart
[root@www.15099.net ~]# php -v
PHP 5.1.6 (cli) (built: Jul 16 2008 19:53:00)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2.1.0, Copyright (c) 1998-2006 Zend Technologies
with eAccelerator v0.9.5.3, Copyright (c) 2004-2006 eAccelerator, by eAccelerator
[root@www.15099.net]#
如果看到eAccelerator v0.9.5.3
证明已经加载成功，且生效
11）重新使用ab命令测试一下网站效率，如下：
[root@[root@www.15099.net ~]# ab -dkS -n100 -c100 http://localhost/phpinfo.php
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright 2006 The Apache Software Foundation, http://www.apache.org/
Benchmarking localhost (be patient).....done
Server Software: Apache
Server Hostname: localhost
Server Port: 80
Document Path: /phpinfo.php
Document Length: 51378 bytes
Concurrency Level: 100
Time taken for tests: 0.551591 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Keep-Alive requests: 0
Total transferred: 5151900 bytes
HTML transferred: 5137800 bytes
Requests per second: 181.29 [#/sec] (mean)
Time per request: 551.591 [ms] (mean)
Time per request: 5.516 [ms] (mean, across all concurrent requests)
Transfer rate: 9120.89 [Kbytes/sec] received
Connection Times (ms)
min avg max
Connect: 0 12 16
Processing: 12 237 535
Total: 12 249 551
[root@www.15099.net ~]#
12)总结，从第9和第11的Time taken for tests:项目，可以看出，加载eAccelerator后效率提高了快1倍。
150伍零999