title: Airflow 1.10 - long delay between tasks
body: <p>I have a problem with long waits between tasks in the same DAG. I'm running Airflow 1.10. Can anyone point to which settings that are relevant to tweak? Please see example below. </p>
  
  <p><a href="https://i.stack.imgur.com/WYeLZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WYeLZ.png" alt="Airflow tasks"></a></p>
  
  <p>The longest wait here is more than one and a half hour.</p>