I doubt it's as simple as adding processing power. That only helps in a linear fashion and it sounds like it was a bigger problem. Probably was IO bound. Also

I doubt it's as simple as adding processing power. That only helps in a linear fashion and it sounds like it was a bigger problem. Probably was IO bound. Also removing bottlenecks is not related to surge capacity but rather code level optimizations that they didn't realize were needed until this happened so it's easy to say that after the fact...