title: Read throughput in DynamoDB
body: <p>Ok, so my understanding of read units is that it costs 1 read unit per item, unless the item exceeds 4KB in which case read units = ceiling(item size/4).</p>
  
  <p>However when I submit a scan asking for 80 items (provisioned throughput is 100), the response returns a ConsumedCapacity of either 2.5 or 3 read units. This is frustrating because 97% of the provisioned hardware is not being used. Any idea why this might be the case?</p>