title: How to set Cassandra (>2.0) JVM heap size of 8GB?
body: <p>How to set Cassandra (>2.0) JVM heap size of 8GB?  When I type in <code>free -m</code> it gives me the following. How can I set the Cassandra JVM heap size to 8GB?</p>
  
  <pre><code>             total       used       free     shared    buffers     cached
  Mem:         16047      11336       4711          0         81       5814
  -/+ buffers/cache:       5441      10606
  Swap:            0          0          0
  </code></pre>