>How would this approach work in an application server that implements concurrency with forking/multiple child processes (Python, ruby, PHP, node cluster, and m

>How would this approach work in an application server that implements concurrency with forking/multiple child processes (Python, ruby, PHP, node cluster, and many many more)? Sadly it mostly doesn't without a lot of work. You need to use languages that are not single threaded (have native multithreading support): Clojure/Java/Go/C# etc. It's why python/ruby/php/node etc are fundamentally constrained. I'd argue those languages are the ones that pushed the horizontal scaling trend as they struggle to get the most out of a single machine.