[jacobsenscott]

There is no one size fits all memory management technique. There are always tradeoffs. The scenario you are describing is not common for ruby apps. Ruby uses a memory management style that is suitable for most ruby workloads.

All the production quality app servers handle killing and and starting new worker processes gracefully and efficiently by forking a running process. Certainly there is some overhead, but that's why you don't underprovision memory, so you don't need to resort to that.