Re: 2.4.23aa2 (bugfixes and important VM improvements for the high end)

[Andrea Arcangeli]

On Thu, Mar 04, 2004 at 09:35:13AM -0800, Martin J. Bligh wrote:
> designed for bigboxen, so 4/4 vs 2/2 would be better, IMHO. People have
> said before that DB performance can increase linearly with shared area
> sizes (for some workloads), so that'd bring you a 100% or so increase
> in performance for 4/4 to counter the loss.

that's a nice theory with the benchmarks that runs with a 64G working
set, but if your working set is smaller than 32G  99% of the time and
you install the 64G to handle the peak load happening 1% of the time
faster, you'll run 30% slower 99% of the time even if the benchmark
only stressing the 64G working set runs a lot faster than with 32G only.
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