title: What does this indicator on the ADT mean?
body: <p>When developing an Android project with the ADT then there is this indicator at the bottom of the IDE :</p>
  
  <p><img src="https://i.stack.imgur.com/e6BVP.png" alt="enter image description here"></p>
  
  <p>What does it represent ? And what to do if it reaches higher value ?</p>