Oh I totally agree the world needs to be more aware of Amdahls law, and I appreciate that you make it known (I believe I even learned it from you). I just think that the communication is sometimes too much "it's our way or the bad way", if that makes sense?
I don't think they have 0% contention, and I agree that contention is the bane of a dev's existence, but I don't think it's as cut and dry as only looking at Amdahl's.
Specialized systems have done really well to handle contention: My go-to example is LMAX. I think I remember a talk where the devs said they were pulling 6M orders per second, and ofc the stock market has an aggressive power law. If you design around contention, you can still push silly high perf (as you've shown).
FWIW I think we both agree that Postgres is not the best DB for this either :P
I don't think they have 0% contention, and I agree that contention is the bane of a dev's existence, but I don't think it's as cut and dry as only looking at Amdahl's.
Specialized systems have done really well to handle contention: My go-to example is LMAX. I think I remember a talk where the devs said they were pulling 6M orders per second, and ofc the stock market has an aggressive power law. If you design around contention, you can still push silly high perf (as you've shown).
FWIW I think we both agree that Postgres is not the best DB for this either :P