Very far I would guess. 10 years ago we took a single bare metal database server running mysql with 8 cores and 64gb of memory to 8 million daily users. 15k re

Very far I would guess. 10 years ago we took a single bare metal database server running mysql with 8 cores and 64gb of memory to 8 million daily users. 15k requests per second of per user dynamic pages at peak load. We did use memcached where we could.