系統優化

$ cat /etc/sysctl.conf
net.ipv4.tcp_max_syn_backlog = 65536
net.core.netdev_max_backlog =  36768
net.core.somaxconn = 36768
 
net.core.wmem_default = 8588608
net.core.rmem_default = 8588608
net.core.rmem_max = 16877216
net.core.wmem_max = 16877216
 
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries 
 
= 2
 
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
 
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3376800
net.ipv4.ip_local_port_range = 1024  65535

$ sysctl -p
$ cat /etc/security/limit.conf
*  hard  nofile  65535
*  soft  nofile  65535

Nginx配置 優化

#user  nobody;
worker_processes  
 
4;
worker_cpu_affinity 0001 0010 0100 1000;
worker_rlimit_nofile 65535;

#pid        logs/nginx.pid;

events {
        use epoll;
        worker_connections 65535;
        multi_accept on;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    #access_log  logs/access.log  main;
    log_format  main  
 
'$http_X_Real_IP $http_CLIENTIP $remote_addr $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for" $request_time';

    sendfile        on;
    tcp_nopush     on;

    keepalive_timeout  60;
    keepalive_requests 10240;
    tcp_nodelay on;
    client_header_buffer_size 4k;
    open_file_cache max=102400 inactive=20s;
    open_file_cache_valid 30s;
    open_file_cache_min_uses 1;
    client_header_timeout 15;
    client_body_timeout 15;
    reset_timedout_connection on;
    send_timeout 15;
    server_tokens off;
    client_max_body_size 10m;

    gzip  off;
    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;

    fastcgi_connect_timeout    600;
    fastcgi_send_timeout 600;
    fastcgi_read_timeout 600;
    fastcgi_buffer_size 64k;
    fastcgi_buffers 4 64k;
    fastcgi_busy_buffers_size 128k;
    fastcgi_temp_file_write_size 128k;
    fastcgi_temp_path /usr/local/nginx/fastcgi_temp;

    server {

        listen       80;
        server_name  localhost;
        access_log  /usr/local/logs/nginx/access.log  main;
        root        html;
        index       index.html index.htm index.php;

        #圖片快取時間        
        location ~* \.(ico|jpe?g|gif|png|bmp|swf|flv)$ {
          expires 30d;
          #log_not_found off;
          access_log off;
        }
        #JS和CSS快取時間
        location ~* \.(js|css)$ {
          expires 7d;
          log_not_found off;
          access_log off;
        }

        error_page   500 502 503 504  /50x.html;
        location / {
                try_files $uri $uri/ @rewrites;
        }

        location @rewrites {
                rewrite ^ /index-development.php last;
        }

        location = /robots.txt {
                access_log off;
                log_not_found off;
         }

        location ~ \.php$ {
            root           html;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_param   SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }
    }
    include conf.d/*;
}

• worker_processes
  nginx執行工作程序個數，一般設定cpu的核心或者核心數x2，如：worker_processes 4;
• worker_cpu_affinity
  執行CPU親和力，與worker_processes對應，如：worker_cpu_affinity 0001 0010 0100 1000;
• worker_rlimit_nofile
  Nginx最多可以開啟檔案數，與ulimit -n保持一致，如：worker_rlimit_nofile 65535;
• events
  事件處理模型。如：

events {
  use epoll;
  worker_connections 65535;
  multi_accept on;
}

• http

http {
include mime.types;
default_type application/octet-stream;
……
sendfile on;
tcp_nopush on;
……

• 連線超時時間

keepalive_timeout 60;
keepalive_requests 10240;
tcp_nodelay on;
client_header_buffer_size 4k;
open_file_cache max=102400 inactive=20s;
open_file_cache_valid 30s;
open_file_cache_min_uses 1;
client_header_timeout 15;
client_body_timeout 15;
reset_timedout_connection on;
send_timeout 15;
server_tokens off;
client_max_body_size 10m;