Sure, if messages were evenly distributed over the day. I think it's the bursty nature of the traffic that causes the scaling issues. A better estimate would pr

Sure, if messages were evenly distributed over the day. I think it's the bursty nature of the traffic that causes the scaling issues. A better estimate would probably assume that half that daily traffic is within 1 hour - i.e. 1.5 million/(60*60) = 417 messages/second.