What is a 504 Gateway Timeout?

An HTTP 504 error occurs when a server does not get a timely response from an upstream server. The backend server is responding too slowly.

Common causes

  • Slow database queries
  • Overloaded server
  • Slow external API
  • Heavy scripts

Solutions

Increase the timeout limits in PHP and Nginx, optimize slow queries and implement caching.

Frequent timeouts? Consider upgrading to VPS hosting for more resources.