title: php how to limit number of entry processes
body: <p>I have php website.
  I continuosely get 508 resource limit exceeded error so am wodering how can I optimise my website to cope with it?</p>
  
  <p>How for example I can lower the number of entry processes my scripts executes?</p>
  
  <p>I already optimised my sql queries and simplified the code but it seems to be egtting worse than better.</p>
  
  <p>Will be grateful for help.
  Thanks </p>