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    SubjectRe: [resent PATCH] Re: very slow parallel read performance
    On Sun, Aug 26, 2001 at 11:07:07PM +0200, Daniel Phillips <phillips@bonn-fries.net> wrote:
    > To recap, you made these changes:
    >
    > - Changed to -ac
    > - Set max-readahead through proc
    >
    > Anything else? Did you change MAX_SECTORS?

    no, I tinkered a lot with my server (freeing up memory), which obviously
    helped somewhat and increased socket buffers to 256k max., makeing i/o
    more chunky and thus more efficient. i also use more than one reader
    thread: under linus' kernels more than one thread made the situation
    worse, on the ac kernels they seem to slightly improve throughout, up to a
    point.

    > > no longer thrashing. And linux does the job nicely ;)
    > Good, but should we rest on our laurels now?

    well, linux-2.4 has a lot of dark corners that need improving, but the
    machine does no longer totally misbehave (4 or 5 mb/s is debatable, but
    2mb/s with more memory and higher load is not ;). it's now acceptable to
    me ;)


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