title: New Relic JVM graphs on Tomcat
body: <p>I am currently trying to optimise my Tomcat on a 64bit sever with 4 GB of memory. Here are my current settings and its ticking over nicely:</p>
  
  <pre><code>-Xms256m
  -Xmx1024m
  -XX:MaxPermSize=256m
  -XX:+UseParNewGC
  -XX:+UseConcMarkSweepGC
  -XX:+CMSClassUnloadingEnabled
  </code></pre>
  
  <p>What I don't quite understand is how they relate to the New Relic charts - is the Eden space heap usage optimal - what should I be aiming on seeing in the reports? <img src="https://i.stack.imgur.com/ZFS2M.png" alt="Relic Charts"></p>