[sksnskkcahan]

It just depends how much capacity they provision. You could overprovision by 10000% like you suggest, or 50%. You can scale based on demand but it’s normal to have a lag.

[lifty]

Certain components cannot be scaled by just adding more machines. For example, scaling a matching engine is slightly more involved than that.

[pushrax]

Or a typical writable database. Resharding data may not be feasible at all during a high load event.