nginx.conf

events {
  worker_connections 4096; # Adjust based on server capacity
}

http {
  access_log off; # Disable access logging
  error_log /var/log/nginx/error.log;

  upstream api {
    server api1:4100;
    server api2:4200;
    keepalive 128; # Increase keepalive connections
  }

  gzip on; # Enable gzip compression
  gzip_comp_level 5; # Compression level (adjust as needed)
  gzip_min_length 256; # Minimum size to compress (adjust as needed)
  gzip_types text/plain text/css application/json application/javascript application/xml; # Compress specific MIME types

  server {
    listen 9999 backlog=4096;

    location / {
      proxy_pass http://api;
      proxy_http_version 1.1;
      proxy_set_header Connection ""; # Enable keepalive connections to upstream servers
      proxy_set_header Host $host;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;
    }

    # Adjust buffer sizes for better performance
    proxy_buffer_size 128k;
    proxy_buffers 4 256k;
    proxy_busy_buffers_size 256k;
    proxy_max_temp_file_size 0;
    proxy_temp_file_write_size 256k; # Adjusted value
  }
}