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    SubjectRe: interactive task starvation
    On Wed, Mar 22, 2006 at 12:37:51AM +1100, Con Kolivas wrote:
    > On Wednesday 22 March 2006 00:33, Mike Galbraith wrote:
    > > On Wed, 2006-03-22 at 00:13 +1100, Con Kolivas wrote:
    > > > On Wednesday 22 March 2006 00:10, Mike Galbraith wrote:
    > > > > How long should Willy be able to scroll without feeling the background,
    > > > > and how long should Apache be able to starve his shell. They are one
    > > > > and the same, and I can't say, because I'm not Willy. I don't know how
    > > > > to get there from here without tunables. Picking defaults is one
    > > > > thing, but I don't know how to make it one-size-fits-all. For the
    > > > > general case, the values delivered will work fine. For the apache
    > > > > case, they absolutely 100% guaranteed will not.
    > > >
    > > > So how do you propose we tune such a beast then? Apache users will use
    > > > off, everyone else will have no idea but to use the defaults.
    > >
    > > Set for desktop, which is intended to mostly emulate what we have right
    > > now, which most people are quite happy with. The throttle will still
    > > nail most of the corner cases, and the other adjustments nail the
    > > majority of what's left. That leaves the hefty server type loads as
    > > what certainly will require tuning. They always need tuning.
    >
    > That still sounds like just on/off to me. Default for desktop and 0,0 for
    > server. Am I missing something?

    Believe it or not, there *are* people running their servers with full
    graphical environments. At the place we first encountered the interactivity
    problem with my load-balancer, they first installed in on a full FC2 with the
    OpenGL screen saver... No need to say they had scaling difficulties and trouble
    to log in !

    Although that's a stupid thing to do, what I want to show is that even on
    servers, you can't easily predict the workload. Maybe a server which often
    forks processes for dedicated tasks (eg: monitoring) would prefer running
    between "desktop" and "server" mode.

    > Cheers,
    > Con

    Cheers,
    Willy

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