title: How to calculate launch configuration properties?
body: <p>in Eclipse Jboss 7.1 VM arguments<br>
  My RAM 8GB<br>
  vm arguments have a this like statements ;<br>
   <br>-server -Xms<strong>64</strong>m 
   <br>-Xmx<strong>512</strong>m 
   <br>-XX:MaxPermSize=<strong>1024</strong>m<br>
  how to calculate this bold numbers?<br></p>
  
  <p>**</p>
  
  <blockquote>
    <p>Caused by: java.lang.OutOfMemoryError: Java heap space</p>
  </blockquote>
  
  <p>**</p>