title: Appfog - Spring application - Disk usage
body: <p>I have a Spring application running on <strong>Appfog</strong>.<br>
  App is connected to a Mysql DB and doesn't use disk storage (it only perform select or insert queries).<br>
  I noticed that the disk usage <strong>increased</strong> constantly in time (My database is very small, it can't be over 300MB).<br>
  This is a screenshot:
  <img src="https://i.stack.imgur.com/aKPUm.png" alt="enter image description here"><br>
  Why disk usage doesn't remain fixed?<br>
  Thanks </p>