nginx.conf

worker_processes auto;
worker_rlimit_nofile 80000;

events {
    use epoll;
    worker_connections 1000;

    multi_accept on;
}

http {

    # Disable logging
    access_log off;
    error_log /dev/null emerg;

    # Enable logging
    # error_log  stderr warn;
    # access_log  /dev/stdout;

    sendfile   on;
    
    upstream api {
        server unix:/dev/shm/api01.sock;
        server unix:/dev/shm/api02.sock;
        keepalive 1000;
        keepalive_requests 100000000;
        keepalive_timeout 1000000;
    }

    server {
        listen 9999;

        location / {
            proxy_buffering off;
            proxy_set_header Connection "";
            proxy_set_header Content-Type "";
            proxy_set_header Accept "";
            proxy_set_header Host "";
            proxy_set_header User-Agent "";
            proxy_http_version 1.1;
            proxy_pass http://api;
        }
    }
}