The last commenter on the original thread is absolutely right: Rails follows different "concurrency model", i.e. it needs multiple processes to run well, especi

The last commenter on the original thread is absolutely right: Rails follows different "concurrency model", i.e. it needs multiple processes to run well, especially on multi-core CPUs. He needs to create a cluster of 4-6 mongrels on 2-core CPU and the margin will shrink.