title: How does Amazon RDS calculate I/O rate?
body: <p>I browsed the Amazon RDS pricing site today and now do want to know how they actually calculate the I/O rate? What does "$0.10 per 1 million requests" really mean?</p>
  
  <p>Can anyone give some simple examples how many I/Os a simple query from EC2 to a MySQL on RDS produces?</p>