Douglas A. Tutty wrote:
On Fri, Apr 11, 2008 at 07:10:04AM -0700, Marc Shapiro wrote:
Is there any way, instead of restricting a resource, to have a command
executed when a setpoint for a given resource is reached? Say, when FF
uses 200M of virtual memory, or over 30% of CPU, a job runs which pops
up a warning message. That way you know that a problem exists and can
handle it BEFORE it gets to the point where the system is locking up.
I wouldn't worry so much about %CPU since you can just run FF nice.
Also, remember that the system should not lock up. The worst case
should be heavy swapping (Thrashing) which means that the system will
eventually respond. However, if the offending process is running niced,
at least login and bash will have a higher priority.
Yes, the system does thrash, not a complete lockup. But, if you try to
move the cursor and few times with no results it certainly seems like a
lockup. I can usually get the system to switch to a VT where I can run
top and kill the offending process, but it can take several minutes
before it will do even that. It doesn't happen often, but with X
running on three separate terminals (my wife, daughter and I each have
our own setup running on this machine) and firefox running in each of
them it does happen every now and then. My wife currently has 18 tabs
open in firefox. My daughter only has one, but it has some kids
game/education site up, all of which use flash. I usually have three or
four tabs open, although I only have one at the moment.
I have never actually used nice, before. I guess I had better do some
research.
--
Marc Shapiro
[EMAIL PROTECTED]
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