On-the-fly throttle of CPU consumption of a process

[sunhux G]

Thanks Dave, I'm aware of "renice" when I mentioned "nice" in the
first post but "renice" is probably not what I'm looking for because
when no other processes need the CPU, this reniced CPU hungry
process would still chew up all the CPU, resulting in the frequent
alerts I'm getting.

Cameron's stutter script of staggering between
  "kill -SIGSTOP pid"
  "kill -SIGCONT pid"
would meet my requirement for other UNIX (HP-UX etc) platforms
as well; due to corporate approval processes, I haven't got a chance
to test it on HP-UX yet to see if the Websphere & Weblogic
processes cope well and with smaller intervals, hopefully it's not
noticeable to users.


Thanks
Sun
On Tue, Apr 6, 2010 at 9:51 PM, Dave Ihnat <dihnat at dminet.com> wrote:

> On Tue, Apr 06, 2010 at 02:33:08PM +1000, Cameron Simpson wrote:
> > On 06Apr2010 11:30, sunhux G <sunhux at gmail.com> wrote:
> > | Q1:
> > | When a running process hogs a CPU, I would like to be able to reduce
> > | its % CPU consumption, say to 50%.  Is there a command to do this or
> > | this is possible in Redhat (& CentOS & HP-UX if anyone knows) ?
> >
> > I'm not sure about constraining its CPU use "evenly", but you can
> > SIGSTOP/SIGCONT it from outside - ceasing execution and then resuming
> > later. I wrote a script called stutter for this purpose:
>
> Hmm...I'm sorry I wasn't paying attention to this earlier, but I don't
> see any mention of trying "renice".  (Man 'renice').
>
> Cheers,
> --
>        Dave Ihnat
>        dihnat at dminet.com
>
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