How to set Cassandra (>2.0) JVM heap size of 8GB?
<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>