Re:How Ravelry Scales to 10 Million Requests Using Rails
by rogerdpack on Friday September 25, 2009 @07:09PM
(#844653)
if you want to save on RAM you can use a 32-bit OS and/or 1.9 or the MBARI patches--works well for me :)
http://programming-gone-awry.blogspot.com/2009/06/how-to-sav...
2.5 of our physical servers run Passenger/Rails.
If this were a Java app, I definitely would have been able to get away with less (mostly because of less memory consumption, but less CPU consumption wouldn't hurt either)
However, I'd probably still want 2 machines for redundancy.