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    SubjectRe: Linux responsiveness under heavy load
    On Wed, 8 Mar 2000, Nicolas MONNET wrote:

    >I've noticed that under heavy loads, and actually, not so heavy loads,
    >Linux's responsiveness is effectively very poor.

    Which kernel version are you using?

    >[..] The
    >system isn't even swapping, [..]

    Supposing you are using 2.2.x if it wasn't VM related it's probably the
    elevator starvation thing. Could you try again with 2.2.14aa10 (it
    includes elevator-starvation-6.gz):

    ftp://ftp.*.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.2/2.2.14aa10.gz

    For reference the elevator-starvation-6.gz patch alone is here:

    ftp://ftp.*.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.2/2.2.14aa10/elevator-starvation-6.gz

    >It's not like there's a bunch of runaway processe: at most, 5 processes
    >are running.

    To be sure about what's going on could you provide me a `vmstat 1` log
    of before/during/after the performance drop?

    Andrea


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