Date: Mon, 30 Nov 2009 15:46:46 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Cc: freebsd-questions@freebsd.org Subject: Re: Phoronix Benchmarks: Waht's wrong with FreeBSD 8.0? Message-ID: <hf0lsf$5mk$2@ger.gmane.org> In-Reply-To: <19219.55350.599595.807654@jerusalem.litteratus.org> References: <4B13869D.1080907@zedat.fu-berlin.de> <0D3A9408-84A8-4C74-A318-F580B41FC1A6@exscape.org> <hf0h0p$lm4$1@ger.gmane.org> <20091130084704.2893cc85.wmoran@potentialtech.com> <19219.55350.599595.807654@jerusalem.litteratus.org>
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Robert Huff wrote: > Bill Moran writes: > >> It's common knowledge that the default value for vfs.read_max is >> non- optimal for most hardware and that significant performance >> improvements can be made in most cases by raising it. > > Documentation/discussion where? There is no documentation except for the sysctl documentation itself: "vfs.read_max: Cluster read-ahead max block count" but it depends on the load - it helps sequential reads, will probably do nothing for other kinds of loads. It is also UFS-only.
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