Centos 默认官方源中没有nginx 和 php-fpm 所以必须添加第三方源，不然就只能自己编译了。

添加[CentALT]源
在/etc/yum.repo.d 目下创建 alt.ru.repo 文件内容如下：

[CentALT]
name=CentALT Packages for Enterprise Linux 5 - $basearch
baseurl=http://centos.alt.ru/repository/centos/5/$basearch/
enabled=1
gpgcheck=0

启用 EPEL

rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm
32系统的用下面命令
rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm

安装 nginx +PHP-FPM +eAccelerator +mysql

yum update
 yum install nginx php-fpm php-cli php-pdo php-mysql php-mcrypt php-mbstring php-gd php-tidy php-xml php-xmlrpc php-pear php-pecl-memcache php-eaccelerator

配置优化Nginx
修改 /etc/nginx/nginx.conf,下面只列出修改的部分。

#根据CPU 核心processes，VPS下几个核心几个processes，独立服务器可x2
worker_processes  4;
 
#启用epoll
worker_rlimit_nofile 51200;
events {
    worker_connections  51200;
    use epoll;
}
#参数调整
    sendfile             on;
    tcp_nopush       on;
    tcp_nodelay      on;
    server_tokens   off;
    keepalive_timeout  50;
    server_names_hash_bucket_size 128;
    client_header_buffer_size 32k;
    large_client_header_buffers 4 32k;
    client_max_body_size 50m;
#fastcgi优化
    fastcgi_connect_timeout  300;
    fastcgi_send_timeout      300;
    fastcgi_read_timeout       300;
    fastcgi_buffer_size          64k;
    fastcgi_buffers 4             64k;
    fastcgi_busy_buffers_size 128k;
    fastcgi_temp_file_write_size 256k;
 
#开启gzip并优化
    gzip on;
    gzip_min_length   1k;
    gzip_buffers     4 16k;
    gzip_http_version 1.0;
    gzip_comp_level 2;
    gzip_types       text/plain application/x-javascript text/css application/xml;
    gzip_vary on;php-fpm 调整
修改/etc/php-fpm.conf 将max_children 调为20

<value name="max_children">20</value>mysql 调整
修改/etc/my.conf [mysqld] 段加入如下指令

skip-network
skip-innodb
skip-locking
skip-bdb
 
key_buffer                      = 16K
max_allowed_packet      = 3M
thread_stack                  = 64K
thread_cache_size         = 8
table_cache                   = 3
query_cache_limit         = 1M
query_cache_size         = 16M系统内核调整

在/etc/sysctl.conf 加入

net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 300
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.ip_local_port_range = 5000    65000
net.ipv4.tcp_max_tw_buckets = 6000

echo “ulimit -SHn 65535” >> /etc/rc.local
styctl -p开启服务并设置系统启动默认启动

ulimit -SHn 65535
/etc/init.d/nginx  start
/etc/init.d/php-fpm start
/etc/init.d/mysqld start
chkconfig nginx on
chkconfig php-fpm on
chkconfig mysqld on