title: How to change the default sleep time (5s) of resque?
body: <p>I'm using Rails with resque.</p>
  
  <p>The "sleep time" is the seconds of a worker sleeping after it can't find any new tasks. </p>
  
  <p>The worker is created by <code>QUEUE=* rake environment resque:work</code>, and the default value is 5s, I can't to change it to 2s.</p>
  
  <p>I have searched for this problem for several hours, somebody can help me?</p>