Re: Lenny overheating, preventing installation
On Sat, Apr 11, 2009 at 03:46:31PM +0200, Klistvud wrote:
> Dne sobota 11 april 2009 ob 15:22:38 je Douglas A. Tutty napisal(a):
> > On Sat, Apr 11, 2009 at 02:26:30PM +0200, Aleksa ??u??uli?? wrote:
> I agree ... to a point. Namely, I've never managed to overheat the unit by
> just _using_ the CPU. It exclusively happens:
>
> 1) during a Debian Lenny installation
> 2) during a certain type of system lock-up which forces both the CPU frequency
> and its usage to go to 100%.
>
> I'd compare (if I may) the situation with a car having, say, a range of 0 to
> 7000 RPM, of which only 2000 to 5000 is actually the "working range". Now,
> forcing the car in a very low gear and running it at a constant 7000 RPM, how
> many minutes until the engine overheats? And, more importantly: how _stupid_
> should one be to actually try doing this at home? It's, in my opinion, what's
> happening here: some runaway process or OS flaw simply ramps up the CPU to a
> regime that wasn't intended to be used for a prolonged time in the first
> place. In normal usage, leaving a CPU running at 100% usage is a rare
> occurence (I'm not talking about CPU frequency here, I'm talking about CPU
> usage - 100% meaning no idle cycles whatsoever over several minutes or even
> hours!).
What about a big compile? Retouching a movie?
For normal usage (other than using iceweasel), I have difficulty getting
my dual PII-450 to less than 90% idle, but there are things that will
bog it down, and no it doesn't overheat. Then again, its a 2U server,
not a laptop.
Doug.
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