Messages in this thread | | | Date | Tue, 21 Mar 2006 14:44:18 +0100 | From | Willy Tarreau <> | Subject | Re: interactive task starvation |
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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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