title: Bitbake build consumes more space
body: <p>I recently started using Bitbake for building Yocto. Everytime I build, it consumes more space and currently I'm running out of disk space. The images are not getting overwritten. A set of new files with timestamp is getting created for every build. I have deleted old files from build/tmp/deploy/images/. But it doesn't make much difference in the disk free space. Is there any other locations from where I can delete stuff?</p>
  
  <p>The error I observe during build is:</p>
  
  <pre><code>WARNING: The free space of source/build/tmp (/dev/sda4) is running low (0.999GB left)
  ERROR: No new tasks can be executed since the disk space monitor action is "STOPTASKS"!
  WARNING: The free space of source/build/sstate-cache (/dev/sda4) is running low (0.999GB left)
  ERROR: No new tasks can be executed since the disk space monitor action is "STOPTASKS"!
  WARNING: The free space of source/build/downloads (/dev/sda4) is running low (0.999GB left)
  ERROR: No new tasks can be executed since the disk space monitor action is "STOPTASKS"!
  </code></pre>
  
  <p>Kindly suggest some pointers to avoid this issue.</p>