我感觉这个说法有误，nginx用的是连接池，一个很大的数组而不是红黑树，大小就是woker_connections的数值。连接池是每个worker进程独立的，所以总连接数就是worker_processes*worker_connections

具体来说报什么错呢？

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

worker_rlimit_nofile 900000;

events {
use epoll;
multi_accept on;
worker_connections 900000;
}

http {

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

server {
client_body_buffer_size 10M;
client_max_body_size 10M;
listen 80;
server_name XXXX;
charset utf-8;
access_log main;
location / {
add_header Access-Control-Allow-Credentials 'true';
add_header Access-Control-Allow-Methods 'GET,PUT,POST,OPTIONS,DELETE';
add_header Access-Control-Allow-Headers '*';
proxy_pass http://192.168.10.25:8200;
proxy_set_header Host $http_host;
#proxy_set_header Host $host;
proxy_set_header X-Forwarded-Host $server_name;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
location /static {
access_log off;
expires 30d;
alias /app/static;
}
}

server {
listen 443 ssl;
server_name XXXX;
client_body_buffer_size 10M;
client_max_body_size 10M;
ssl_certificate /etc/nginx/cert/xxxx.pem;
ssl_certificate_key /etc/nginx/cert/xxxx.key;
ssl_session_timeout 5m;
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
location / {
add_header Access-Control-Allow-Methods 'GET,POST,OPTIONS';
add_header Access-Control-Allow-Headers '*';
add_header Access-Control-Allow-Credentials 'true';
proxy_pass http://192.168.10.25:8200;
proxy_set_header Host $http_host;
#proxy_set_header Host $host;
proxy_ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
proxy_set_header X-Forwarded-Host $server_name;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
location /static {
access_log off;
expires 30d;
alias /app/static;
}
}
}