梳理：Nginx的配置文件详解

user  nginx;   
worker_processes  4;   #nginx进程,一般设置为和cpu核数一样

error_log  /data/logs/nginx/error.log warn;   #错误日志存放目录 
pid        /var/run/nginx.pid;  #进程pid存放位置

#工作模式及连接数上限
events {
    worker_connections  1024; #连接数
}


http {
    include       /etc/nginx/mime.types;  #文件扩展名与类型映射表
    default_type  application/octet-stream; #默认文件类型
    charset  utf-8;

    server_names_hash_bucket_size 1280;   #设定请求缓存 
    client_header_buffer_size 10240k;
    large_client_header_buffers 16 5120k;
    client_max_body_size 200m;

	  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  /var/log/nginx/access.log  main;
    access_log  /data/logs/nginx/access.log  main;


    sendfile        on;
    tcp_nopush     on;

    keepalive_timeout  65;

    #fastcgi_cache_path /usr/local/nginx/fastcgi_cache levels=1:2
    #            keys_zone=TEST:10m
    #            inactive=5m;
    fastcgi_connect_timeout 3000s;
    fastcgi_send_timeout 3000s;
    fastcgi_read_timeout 3000s;
    fastcgi_buffer_size 128k;
    fastcgi_buffers 8 256k;
    fastcgi_busy_buffers_size 256k;
    fastcgi_temp_file_write_size 256k;
    fastcgi_intercept_errors on;

    proxy_redirect              off;
    proxy_set_header            Host $host;
    proxy_set_header            X-Real-IP $remote_addr;
    proxy_set_header            X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_ignore_client_abort   on;

    proxy_connect_timeout       6000;
    proxy_send_timeout          6000;
    proxy_read_timeout          6000;
    proxy_buffer_size           4k;
    proxy_buffers               4 32k;
    proxy_busy_buffers_size     64k;
    proxy_temp_file_write_size  64k;
    send_timeout                6000;
    proxy_buffering             off;
    proxy_next_upstream error;

   # fastcgi_cache_valid 200 302 1h;
   # fastcgi_cache_valid 301 1d;
   # fastcgi_cache_valid any 1m;
   # fastcgi_cache_min_uses 1;
   # fastcgi_cache_use_stale error timeout invalid_header http_500;

    open_file_cache max=204800 inactive=20s;
    open_file_cache_min_uses 1;
    open_file_cache_valid 30s;

    tcp_nodelay on;

    gzip on;#开启gzip压缩功能
    gzip_min_length  1k;
    gzip_buffers     4 16k;#压缩缓冲区大小。表示申请4个单位为16K的内存作为压缩结果流缓存，默认值是申请与原始数据大小相同的内存空间来存储gzip压缩结果
    gzip_http_version 1.0;#压缩版本（默认1.1，前端为squid2.5时使用1.0）用于设置识别HTTP协议版本，默认是1.1，目前大部分浏览器已经支持GZIP解压，使用默认即可。
    gzip_comp_level 2;# 压缩比率。用来指定GZIP压缩比，1压缩比最小，处理速度最快；9压缩比最大，传输速度快，但处理最慢，也比较消耗cpu资源。
    gzip_types       text/plain application/x-javascript text/css application/xml;  #用来指定压缩的类型，“text/html”类型总是会被压缩
    gzip_vary on; #Squid缓存经过Nginx压缩的数据。


    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}