On Fri, 7 Jul 2000, Andreas Dilger wrote:
> It would be interesting to have some statistics on what real overcommit
> usage is like right now, since any fork/exec will temporarily use 2x the
> VM of the original process. For example, Netscape is a big program, and
> it forks a DNS handler at startup, so if you limit your users to a
> "reasonable" amount of VM, they might not be able to run Netscape, even
> though after the exec is completed Netscape+DNS handler do exceed the VM
> limit you imposed.
The further step after per-user resource limits is to have per-user RSS
dynamic limits.
With per-user RSS dynamic limits you avoid memory starvation in a more
flexible way, instead hard memory limits per user.
People already discussed dynamic RSS limits in the linux-mm list (Rik van
Riel has an idea of how to implement it).
Take a look at the archives.
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