[root@xxxxxx nginx]# free -m  
       total    used    free   shared  buffers   cached  
Mem:      994    815    179     0     43    118  
-/+ buffers/cache:    453    540  
Swap:      0     0     0  
 
[root@xxxxxx nginx]# cat /proc/cpuinfo  
processor    : 0  
vendor_id    : GenuineIntel  
cpu family   : 6  
model      : 62  
model name   : Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz  
stepping    : 4  
cpu MHz     : 2594.024  
cache size   : 20480 KB  
physical id   : 0  
siblings    : 1  
core id     : 0  
cpu cores    : 1  
apicid     : 0  
initial apicid : 0  
fpu       : yes  
fpu_exception  : yes  
cpuid level   : 13  
wp       : yes  
flags      : fpu vme de pse tsc msr pae mce cx8 apic 。。。。省略。。。。  
bogomips    : 5188.04  
clflush size  : 64  
cache_alignment : 64  
address sizes  : 46 bits physical, 48 bits virtual  
power management: 

pm = dynamic           //进程数，动态分配
pm.max_children = 24       //最大进程数
pm.start_servers = 8       //刚启动时的进程数
pm.min_spare_servers = 8     //服务器空闲时的最小进程数
pm.max_spare_servers = 24     //服务器空闲时的最大进程数

php_flag[display_errors] = off  //运行一段时间后，将错误提示信息关闭掉

# vim /etc/yum.repos.d/nginx.repo  //加上以下内容

[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=0
enabled=1

# yum install nginx   //更新nginx

worker_processes auto;   //设置auto，nginx进程动态分配

# access_log  //注释掉，减少I/O
# log_format  //注释掉，减少I/O

gzip on;     //开启gzip
gzip_min_length 1k;
gzip_buffers   4 16k;
gzip_http_version 1.1;
gzip_comp_level 5;    //1-9,越大压缩越好，消耗资源越大
gzip_types    text/plain application/x-javascript text/css application/xml;
gzip_vary on;