Nginx forward proxy with requests rate throttling

nginx.conf

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    keepalive_timeout  65;

    gzip  on;

    #limit_req_zone $binary_remote_addr zone=mylimit:10m rate=1r/s;
    limit_req_zone $http_host zone=mylimit:10m rate=1r/s;

    server {
        listen       8080;

        location / {
            limit_req zone=mylimit burst=9999;
            resolver 8.8.8.8;
            proxy_pass http://$http_host$uri$is_args$args;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}