I think it is more reasonable to compose it from mixture of big to small machines while keeping healthy margin for reserve. It is very much unlikely to get 20 m

I think it is more reasonable to compose it from mixture of big to small machines while keeping healthy margin for reserve. It is very much unlikely to get 20 machines above limit and top up all available cores. Also don't forget, that vCPUs most probably don't have any affinity to psychical cores