ower portion of the dialog displays details of the current JVM memory configuration. Including: 
  <ul>
    <li>Size - the amount of memory currently allocated to the JVM.</li> 
    <li>Used - the amount of currently allocated memory used (not free).</li>
    <li>Max - the amount of memory that the JVM could grow to occupy.</li>
  </ul>
The values are displayed in human readable IEC units based on base 2 calculation (for example: 1024Bytes equals 1KiB, etc).
<p>
Generally max should be close to -Xmx (if spe