Date: Fri, 01 Aug 2003 09:06:18 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Robert Watson <rwatson@freebsd.org> Cc: arch@freebsd.org Subject: Re: headsup: swap_pager.c Message-ID: <5893.1059721578@critter.freebsd.dk> In-Reply-To: Your message of "Thu, 31 Jul 2003 19:08:17 EDT." <Pine.NEB.3.96L.1030731190517.85739A-100000@fledge.watson.org>
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In message <Pine.NEB.3.96L.1030731190517.85739A-100000@fledge.watson.org>, Robe rt Watson writes: > >On Thu, 31 Jul 2003, Poul-Henning Kamp wrote: > >> I am in the process of changing the on-disk layout policy used by the >> swap_pager. > >Do you anticipate any performance changes as a result of this change? Anticipate ? No. Be surprised by improvements ? No. The striping code limits the I/O size for paging activity to a small size. By laying out each disk sequentially in the "swap device" we can increase that size to what our I/O system can lift. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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