第一步

vi /etc/security/limits.conf

#加入下面四行

root soft nofile 655360
root hard nofile 655360
* soft nofile 655360
* hard nofile 655360 

第二步

vi /etc/nginx/nginx.conf

# 设置

worker_rlimit_nofile 10240;
events {
    worker_connections  10240;
}