title: jmap output understanding
body: <p>Jmap histo live O/P is like this:</p>
  
  <pre><code>   8:         72350       99408664  &lt;instanceKlassKlass&gt;
     9:         72350       85348552  &lt;constantPoolKlass&gt;
    10:         70884       48964288  &lt;constantPoolCacheKlass&gt;
  </code></pre>
  
  <p>Can anyone please explain the meaning of in instanceKlassKlass and the other two??</p>