Joshua D. Drake wrote:
Yes - we have seen with oracle 64 bit that there can be as much as a 10% hit moving from 32 - but we make it up big time with large db-buffer sizes that drastically
Well for Opteron you should also gain from the very high memory bandwidth and the fact that it has I believe "3" FP units per CPU.

Sure.  But you get those benefits in 32 or 64-bit mode.


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