In other words, it makes sense to switch to a very low overhead web server. How does quixote or node compare in terms of memory performance?
If youre on a host that has half the cpu but 3 times the RAM then more processes are queued.
During a heavy load the larger RAM will mean more threads can be handled as there is space to store them in memory.
As you have a slower cpu it will take a bit longer, but you should fulfill more of the incoming requests.