nginx優(yōu)化的六點(diǎn)方法

[root@proxy ~]# ab -n 2000 -c 2000 http://192.168.4.5/
Benchmarking 192.168.4.5 (be patient)
socket: Too many open files (24)    //提示打開文件數(shù)量過多

[root@proxy ~]# vim /usr/local/nginx/conf/nginx.conf
.. ..
worker_processes 2;     //與CPU核心數(shù)量一致
events {
worker_connections 65535;  //每個(gè)worker最大并發(fā)連接數(shù)
use epoll;
}
.. ..
[root@proxy ~]# nginx -s reload

[root@proxy ~]# ulimit -a      //查看所有屬性值
[root@proxy ~]# ulimit -Hn 100000    //設(shè)置硬限制（臨時(shí)規(guī)則）
[root@proxy ~]# ulimit -Sn 100000    //設(shè)置軟限制（臨時(shí)規(guī)則）
[root@proxy ~]# vim /etc/security/limits.conf
 .. ..
*    soft nofile   100000
*    hard nofile   100000
#該配置文件分4列，分別如下：
#用戶或組 硬限制或軟限制 需要限制的項(xiàng)目 限制的值

[root@proxy ~]# ab -n 2000 -c 2000 http://192.168.4.5/

[root@proxy ~]# cat lnmp_soft/buffer.sh 
#!/bin/bash
URL=http://192.168.4.5/index.html?
for i in {1..5000}
do
 URL=${URL}v$i=$i
done
curl $URL        //經(jīng)過5000次循環(huán)后，生成一個(gè)長的URL地址欄
[root@proxy ~]# ./buffer.sh
.. ..
<center><h1>414 Request-URI Too Large</h1></center>  //提示頭部信息過大

[root@proxy ~]# vim /usr/local/nginx/conf/nginx.conf
.. ..
http {
client_header_buffer_size 1k;  //默認(rèn)請(qǐng)求包頭信息的緩存 
large_client_header_buffers 4 4k;  //大請(qǐng)求包頭部信息的緩存?zhèn)€數(shù)與容量
.. ..
}
[root@proxy ~]# nginx -s reload

[root@proxy ~]# cat /usr/local/nginx/conf/nginx.conf
http {
.. ..
gzip on;       //開啟壓縮
gzip_min_length 1000;    //小文件不壓縮
gzip_comp_level 4;    //壓縮比率
gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
         //對(duì)特定文件壓縮，類型參考mime.types
.. ..

http { 
open_file_cache   max=2000 inactive=20s;
  open_file_cache_valid 60s;
  open_file_cache_min_uses 5;
  open_file_cache_errors off;
//設(shè)置服務(wù)器最大緩存2000個(gè)文件句柄，關(guān)閉20秒內(nèi)無請(qǐng)求的文件句柄
//文件句柄的有效時(shí)間是60秒，60秒后過期
//只有訪問次數(shù)超過5次會(huì)被緩存
}

[root@proxy ~]# vim /usr/local/nginx/conf/nginx.conf
server {
  listen  80;
  server_name localhost;
  location / {
   root html;
   index index.html index.htm;
  }
location ~* \.(jpg|jpeg|gif|png|css|js|ico|xml)$ {
expires  30d;   //定義客戶端緩存時(shí)間為30天
}
}
[root@proxy ~]# cp /usr/share/backgrounds/day.jpg /usr/local/nginx/html
[root@proxy ~]# nginx -s reload