Tuning? I thought "the cloud" eliminated the need for that!? The impression that I get from HN comment threads is that developer time is expensive and so "the

Tuning? I thought "the cloud" eliminated the need for that!? The impression that I get from HN comment threads is that developer time is expensive and so "the right way" to handle problems like this is to simply spin up more and more EC2 instances until the problem eventually goes away.