Rails Benchmarking: Puma and MultiProcess — Engineering Blog

This week, I've been playing with Puma processes. Headius, Nate Berkopec, you can probably stop reading now. You won't learn much ;-) One consequence of the GIL is that a single Ruby process has limited ability to fully use the capabilities of a multi-core machine, including a larger AWS instance. As a result, the optimum number of Rails processes for your AWS instance is probably not just one. I'