title: How to get heap usage using jstat?
body: <p>I'm running <code>jstat -gc</code> (from OpenJDK):</p>
  <pre><code># jstat -gc 1
   S0C    S1C    S0U    S1U      EC       EU        OC         OU       MC     MU    CCSC   CCSU   YGC     YGCT    FGC    FGCT     GCT
  287744.0 290304.0 88368.6  0.0   1469440.0 787186.5 2162176.0  1805969.7  945432.0 923880.4 136576.0 133284.0    268   32.797  21     30.089   62.886
  </code></pre>
  <p>How to read:</p>
  <ol>
  <li><p>used heap</p>
  </li>
  <li><p>heap size</p>
  </li>
  <li><p>max heap</p>
  </li>
  </ol>
  <p>from this output, just like shown by VisualVM?</p>