title: High disk watermark exceeded even when there is not much data in my index
body: <p>I'm using elasticsearch on my local machine. The data directory is only 37MB in size but when I check logs, I can see:</p>
  
  <blockquote>
    <p>[2015-05-17 21:31:12,905][WARN ][cluster.routing.allocation.decider] [Chrome] high disk watermark [10%] exceeded on [h9P4UqnCR5SrXxwZKpQ2LQ][Chrome] free: 5.7gb[6.1%], shards will be relocated away from this node</p>
  </blockquote>
  
  <p>Quite confused about what might be going wrong. Any help?</p>