1.worker_processes，是表示工作程序的數量，

但是這個值應該怎麼設定呢？理論上來說按照cpu核心數的倍數來設定是沒錯的，但是到底是幾倍呢？有的人說是有多少個核心就設定多少個程序，還有種說法是設成cpu核心數的兩倍

2.worker_connections，單個工作程序可以允許同時建立外部連線的數量，可通過 ulimit -n 命令查詢，以前是1024，現在是65535

nginx提供了worker_rlimit_nofile指令，此指令的值將覆蓋ulimit的值，如：worker_rlimit_nofile 65535;設定ulimits：ulimit -SHn 65535

user   www-data;
 
#工作程序數
worker_processes  4;

error_log  /usr/local/nginx/logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

pid        /usr/local/nginx/logs/nginx.pid;

#單個工作程序可以允許同時建立外部連線的數量
worker_rlimit_nofile 65535;
events {
    worker_connections  65535;
}


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

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #
 
tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   html;
            index  index.html index.php index.htm;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        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;
        }

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }

    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}

參考：https://blog.csdn.net/zhuyu19911016520/article/details/90714429