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On Mon, 5 Jun 2006 08:28:07 +0800 Fengguang Wu <fengguang.wu@gmail.com> wrote: > On Sun, Jun 04, 2006 at 01:50:11PM -0700, Andrew Morton wrote: > > readahead-kconfig-options.patch > [...] > > It's early days yet - needs heaps more performance testing. The results > > from "Linux Portal" <linportal@gmail.com> were discouraging. > > I found this mail from the lkml archive, did you happen to have more > results? > Sorry, I had the wrong tester. Voluspa <lista1@comhem.se>: "Conclusion: On _this_ machine, with _these_ operations, Adaptive Readahead in its current incarnation and default settings is a _loss_." > > There is an interesting (although simple) benchmark of Wu's adaptive > readahead patchset (v12) together with graphs here: > > http://linux.inet.hr/adaptive_readahead_benchmark.html > > In that simple test it definitely looks promising (3x speedup). That's postgreql again. We know there's a problem at present with postgresql. Has anyone tried to fix it, without going and rewriting everything? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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