List Archive: gentoo-amd64
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Mark Haney wrote:
> Is there another way to use nice, or to fix that problem? Or another
> way to manage CPU usage during an emerge?
I'll just echo what Duncan said about nice / ionice. However, you might
find the impact of ionice -c 3 on compilation is reduced if you use a
tmpfs for /var/tmp/portage. Note that depending on what you're building
you might need a fairly large tmpfs, and it could trigger swapping.
Note also that all your settings for niceness/etc won't impact RAM
consumption - even a niced emerge is going to eat RAM when building some
of the more massive packages.
However, I find that I can run almost anything with ionice -c 3 nice -n
20 <command> and have almost no impact on my system at all. Conversely,
I set stuff like the mythtv backend to run with ionice -c 1 so that I
never drop frames due to recording buffer issues.
Just don't go crazy with it. If I try to build two copies of firefox
(chroot and main) while running some java app that consumes 1GB of
virtual address space, and then try to transcode a video or something
while recording two videos, having all that stuff set to ionice/nice
won't be of much help.