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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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