title: PHP/MYSQL Script - 503 Service Unavailable
body: <p>I've PHP script that executes a big sql queires that could takes to 10 minutes.
  the script works fine on localhost. also the script was working fine on server. but since yesterday it started to show this error.</p>
  <pre><code>**Service Unavailable**
  
  The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
  
  Additionally, a 503 Service Unavailable error was encountered while trying to use an ErrorDocument to handle the request.
  </code></pre>
  <p>and when I contacted the support team of my hosting. they came back to me that the issue is in the script. but the wired thing that the script was working just fine since 2 weeks and out of sudden since yesterday this error starts to show up.</p>
  <p>does anyone knows to to trace the log files for such an error? because the support team they are not willing to help in this manner</p>