linux-kernel - Re: How to immunize a process from the OOM Killer

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Date:	Thu, 29 Oct 2009 12:10:48 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Juan Miscaro <jmiscaro@...il.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: How to immunize a process from the OOM Killer

On Thu, 29 Oct 2009, Juan Miscaro wrote:

> Hi, I'm running 2.6.24 on Ubuntu.
> 
> I've got a OOM Killer gone wild.  I have plenty of free memory (over
> 40 GB) and lots of processes are being murdered.  Anyway, I would like
> to first prevent a few processes from being killed in the hopes of
> buying me time (users can work) to discover why the killer is being
> invoked in the first place.
> 
> I've read in a few places [1] that in order to immunize a process you
> need to modify the value of /proc/PID/oom_adj.  Thing is, such files
> cannot be edited directly.  How do I achieve my goal?
> 

You need to do it as the superuser:

	$ sudo su
	# echo -17 > /proc/pid/oom_adj

or

	sudo sh -c "echo -17 > /proc/pid/oom_adj"
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