We're using Rails to serve dynamic data for a bunch of ads, which are
going to be exposed about 3 million times/day.
To estimate the hardware setup, we're trying to figure out what our peak
load will be. They'll be running on your average news/entertainment
sites, anyone know of a somewhat good formula to guesstimate what our
likely scenario is going to be?
Our best guess is that three peak hours (lunch+evening) will consume
half of all queries. This would leave us with peaks at about 150 req./s.
Also, I've been told/read that 40 req./s. is what to calculate for each
Mongrel for a simple Rails app, does that seem reasonable?