title: How much memory Kafka cluster needs?
body: <p>How can i calculate how much memory and cpu my Kafka cluster needs?
  My cluster consists from 3 nodes, with throughput of ~800 messages per second. </p>
  
  <p>Currently they have (each) 6 GB ram, 2 CPU, 1T disk, and it seems to be not enough. How much would you allocate?</p>