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Date: Fri, 13 Sep 2002 15:02:21 +0200 (CEST)
From: Giuliano Pochini <pochini@shiny.it>
To: Helge Hafting <helgehaf@aitel.hist.no>
Subject: Re: Killing/balancing processes when overcommited
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> This is hard to setup, and has the some weaknesses:
> 1. You worry only about apps you _know_.  But the guy who got
> his netscape or make -j killed will rename his
> copies of these apps to something else so your carefully
> set up oom killer won't know what is running.
> (How much memory is the "mybrowser" app supposed to use?)
> Or he'll get another software package that you haven't heard of.
>
> 2. Lots and lots of people running netscapes using
> only 70M each will still be too much.  Think of
> a university with xterms and then they all
> goes to cnn.com or something for the latest news
> about some large event.
>
> Even nice well-behaved apps
> is bad when there is unusually many of them. [...]

That's obvious. The point is that the sysadmin should be
able to hint the oom killer as much as possible.
The current linux/mm/oom_kill.c:badness() takes into account
many factors. The sysadmin should be able to affect the
badness calculation on process/user/something basis.



Bye.

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