Wasn't the context switching issue occurring in specific cases only?
I haven't seen any benchmarks for a 50% performance difference. Neither have I seen any benchmarks of pure disk IO performance of specific models of Dell vs HP or Sun Opterons.
Well, I'm speaking more from what I remember reading, than personal testing. Probably 50% is too high, but I thought I remembered it being more general than just specific cases.
I agree, though, that disk bandwidth is probably more important than CPU issues, though. And the extra 15k might get you a lot of disk performance.
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