Re: sustained sequential disk IO runs interactivity into the ground

From: Steven Hartland (killing_at_multiplay.co.uk)
Date: 06/21/05

  • Next message: Mike Tancsa: "Re: sustained sequential disk IO runs interactivity into the ground" 
    To: <eng@donut.ugcs.caltech.edu>, <freebsd-performance@freebsd.org>
Date: Tue, 21 Jun 2005 14:07:20 +0100

    Have you tried the vfs patch posted a few weeks ago?

        Steve / K
    ----- Original Message -----
    From: <eng@donut.ugcs.caltech.edu>

    >I was doing a dd of dev/zero into a file on a UFS2 filesystem
    > (softupdates disabled) on a clean 5.4-R system.
    >
    > an exec of top took approximately 30 seconds to complete
    > and then revealed sys: 13% and idle: 87%
    >
    > quit, repeat five times, same delay, same numbers each time.
    >
    > FreeBSD 4.11 managed this with only a minor interactivity
    > hit.
    >
    > What's going on here? Any ideas?

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  • Next message: Mike Tancsa: "Re: sustained sequential disk IO runs interactivity into the ground"

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