keepalive_timeout参数是一个请求完成之后还要保持连接多久，不是请求时间多久，目的是保持长连接，减少创建连接过程给系统带来的性能损耗，类似于线程池，数据库连接池。

 

[root@web01 ~]# cat /application/nginx/conf/nginx.confworker_processes  1;events {
       worker_connections  1024;}http {
       include      mime.types;    default_type  application/octet-stream;    sendfile        on;    keepalive_timeout  65;    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '                                  '$status $body_bytes_sent "$http_referer" '                                  '"$http_user_agent" "$http_x_forwarded_for"';