Date: Thu, 16 Nov 2000 09:40:17 -0200 (BRDT) From: Rik van Riel <riel@conectiva.com.br> To: Terry Lambert <tlambert@primenet.com> Cc: void <float@firedrake.org>, hackers@FreeBSD.ORG Subject: Re: "iowait" CPU state Message-ID: <Pine.LNX.4.21.0011160938080.13085-100000@duckman.distro.conectiva> In-Reply-To: <200011160828.BAA00995@usr02.primenet.com>
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On Thu, 16 Nov 2000, Terry Lambert wrote:
> > > Modern bloat-ware really pisses me off; I built the bind
> > > library the other day: the frigging thing was 4M, unstripped.
> >
> > How does this affect the (non?-)usefullness of the
> > %iowait statistic?
>
> When you are waiting for I/O in a well written program, it
> is because there's nothing left to do but wait, which would
> make the statistic useless. If there's something else you
> could do, and you're waiting, by definition the program is
> not well written (well written programs don't waste time for
> no good reason).
Ummm, how about a situation where you have a steadily
increasing work load (more customers?) and want to have
decent statistics of your servers to determine exactly
what parts to upgrade and/or if you need to put extra
machines into service?
I agree that *any* statistics become useless after some
time in a completely static situation, but thruth is that
the number of internet users is still increasing and the
workload on servers is doing the same ;)
regards,
Rik
--
"What you're running that piece of shit Gnome?!?!"
-- Miguel de Icaza, UKUUG 2000
http://www.conectiva.com/ http://www.surriel.com/
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