title: Graphing a process's memory usage
body: <p>Does anyone know of a tool to visually show the memory usage of a selected process on Ubuntu?</p>
  
  <p><code>ps aux</code> will show a numerical snapshot, but I'd really like a line I can watch change as I hammer the process and hopefully see unexpected behaviours.</p>
  
  <p>Has anyone got any suggestions?</p>