Date: Wed, 21 Jul 2010 19:44:17 +1000 (EST) From: Bruce Evans <brde@optusnet.com.au> To: Ivan Voras <ivoras@FreeBSD.org> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org, John Baldwin <jhb@FreeBSD.org>, Bruce Evans <brde@optusnet.com.au> Subject: Re: svn commit: r210217 - head/sys/kern Message-ID: <20100721193900.L7531@delplex.bde.org> In-Reply-To: <AANLkTilQm_nP-GAd-KHJPjdJcB8gX58dnI7f6xmpCpJp@mail.gmail.com> References: <201007181015.o6IAFXvK018739@svn.freebsd.org> <201007190829.21995.jhb@freebsd.org> <20100721134319.E7228@delplex.bde.org> <AANLkTilQm_nP-GAd-KHJPjdJcB8gX58dnI7f6xmpCpJp@mail.gmail.com>
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On Wed, 21 Jul 2010, Ivan Voras wrote: > On 21 July 2010 06:18, Bruce Evans <brde@optusnet.com.au> wrote: >> On Mon, 19 Jul 2010, John Baldwin wrote: >> >>>> Log: >>>> In keeping with the Age-of-the-fruitbat theme, scale up hirunningspace >>>> on >>>> machines which can clearly afford the memory. >>>> >>>> This is a somewhat conservative version of the patch - more fine tuning >>>> may be >>>> necessary. >>>> >>>> Idea from: Thread on hackers@ >>>> Discussed with: alc >> >> Sorry I didn't look at the thread, but I wonder if you should increase >> lorunningspace similarly. > > The previous ratio of lorunningspace to hirunningspace was 1/2 - is > this still a good target? I don't know if the ratio is more important than difference. Maybe neither is very important once the difference is not very small. > It does seem like there would be more benefitial to hang these > variables per mount-point or something similar but I'm content that > they are tunable and that the new values help high-end machines, > probably in cooperation with tagged (NCQ-like) IO. So the high end machine owners are less capable of tuning? :-) This might be the case even if they also have higher end money and support, since the higher end is bleeding edge. Bruce
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