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I don't know about your computer but when mine is working properly no process is sucking 95%+ over time. I would like to have some failsafe that kills any processes behaving like that. This comes to mind because when I woke up this morning my laptop had been crunching all night long on a stray chromium child process.

This can probably be done as a cron job, but before I make it a full time job creating something like this I'd thought I should check here. :) I hate reinventing the wheel.

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This is for sure possible (using ps and similar tools). But the real question is, do you really want that? Check-Programs of all kind can grind pretty high cpu usage for quiet some time, also image-processing can take that, too. You should ask yourself a question: Is it worth the aftermath if it kills the wrong process? – Bobby May 3 '10 at 13:16
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You almost always should fix the underlying problem. It's not really a good idea to blindly kill processes based on their resource usage. That's what the kernel's OOM-killer is for (at least for memory). – Dennis Williamson May 3 '10 at 13:32
I'd also have to argue against doing it with any kind of auto-kill script/job. Maybe auto-notify is the right way and you can decide to kill or not. Fix underlying problem once it's identified. If your computer can send email to your phone then you can do this "real-time" or close enough. – hotei Aug 23 '10 at 16:45

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Others have encountered this problem, and while there doesn't seem to be any prevention mechanisms builtin to Ubuntu, there are some ideas about how to improve this.

There's a similar Serverfault question that mentions Monit might be able to help.

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