# set user for nginx
user www-data;

# you must set worker processes based on your CPU cores
worker_processes 2;

# number of file descriptors used for nginx
# the limit for the maximum FDs on the server is usually set by the OS.
# if you don't set FD's then OS settings will be used which is by default 2000
worker_rlimit_nofile 100000;

pid /run/nginx.pid;

events {
    # determines how much clients will be served per worker
    worker_connections 1024;

    # optimized to serve many clients with each thread, essential for linux
    use epoll;

    # accept as many connections as possible
    multi_accept on;
}

http {
    server_tokens off;

    # error log will be only write from warn-level
    error_log  /var/log/nginx.error_log warn;

    # no logging for 3XX
    map $status $loggable {
        ~^[3]  0;
        default 1;
    }

    # send headers in one piece, it is better than sending them one by one
    tcp_nopush on;

    # don't buffer data sent, good for small data bursts in real time
    tcp_nodelay on;

    # caching
    # optimizes serving static files from the file system
    sendfile on;

    # assets file, 1000 files for 30 seconds
    open_file_cache max=200000 inactive=20s;
    open_file_cache_valid 30s;
    open_file_cache_min_uses 2;
    open_file_cache_errors on;

    #buffer
    client_body_buffer_size 128k;
    client_max_body_size 250m;
    client_header_buffer_size 1k;

    large_client_header_buffers 4 4k;

    output_buffers 1 32k;
    postpone_output 1460;

    # allow the server to close connection on non responding client, this will free up memory
    reset_timedout_connection on;

    # server will close connection after this time -- default 75
    keepalive_timeout 30;

    client_header_timeout 3m;
    client_body_timeout 10m;
    send_timeout 3m;

    # compress files, but not on older version of IE
    gzip on;
    gzip_min_length 1000;
    gzip_vary on;
    gzip_proxied expired no-cache no-store private auth;
    gzip_disable "MSIE [1-6]\.";
    gzip_types
        application/x-javascript
        text/css
        application/javascript
        text/javascript
        text/plain
        text/xml
        application/json
        application/vnd.ms-fontobject
        application/x-font-opentype
        application/x-font-truetype
        application/x-font-ttf
        application/xml
        font/eot
        font/opentype
        font/otf
        image/svg+xml
        image/vnd.microsoft.icon;

    # includes
    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*.conf;
    include /etc/nginx/mime.types;
}