title: Cassandra - Read Performance Variation
body: <p>I have written 6 Million records to a column family in Cassandra (3 Nodes,2 GB Heap per node). </p>
  
  <p>Now, when I read the same 6 million records sequentially, I find a huge variation in the read performance(reads/sec).</p>
  
  <p>I have attached the graph. Any help is appreciated.</p>
  
  <p><img src="https://i.stack.imgur.com/T5FUw.png" alt=" Cassandra - Read performance graph"></p>