title: What is retained size for an object on heapdump?
body: <p>I've recently increase my use of the Profiler in Netbeans (6.7), this is a great tool. </p>
  
  <p>I have a question however. When taking a heap dump, on the summary page (expect window) it is possible to 'find the biggest objects by retained size'.</p>
  
  <p>What is this value and how is it used to analyze memory usage?</p>