Re: Very low disk performance Highpoint 1820a

From: Petri Helenius (pete_at_he.iki.fi)
Date: 04/29/05

  • Next message: Steven Hartland: "Re: Very low disk performance Highpoint 1820a" 
    Date: Fri, 29 Apr 2005 12:40:53 +0300
To: "Arne \"WXrner\"" <arne_woerner@yahoo.com>

    Arne WXrner wrote:

    >--- Petri Helenius <pete@he.iki.fi> wrote:
    >
    >
    >>Eric Anderson wrote:
    >>I'm seeing similar sequential performance on RELENG_5_3 and
    >>RELENG_5_4
    >>on dual-Xeons using 3ware controllers so it does not seem to be
    >>a driver issue [...]
    >>
    >>
    >>
    >Why?
    >
    >I can remember, that some people said some months before, that
    >FreeBSD's R4 was much faster (maybe something in the kernel
    >changed due to SMPng, so that the disc subsystem behaves funny?).
    >
    >
    I mean the issue does not seem to be specific to a controller, but
    generic in the way how kernel schedules requests.

    Pete

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