Re: /proc/self/oom_adj is deprecated in newer Linux kernels

On 2014-06-10 11:52:17 -0400, Tom Lane wrote:
> andres@anarazel.de (Andres Freund) writes:
> > On 2014-06-10 11:20:28 -0400, Tom Lane wrote:
> >> Maybe I'm mistaken, but I thought once the fork_process code has reset our
> >> process's setting to zero it's not possible to lower it again (without
> >> privileges we'd not have).
> 
> > No, doesn't look that way. It's possible to reset it to the value set at
> > process start. So unless we introduce double forks for every backend
> > start it can be reset by ordinary processes.
> 
> That's kind of annoying --- I wonder why they went to the trouble of doing
> that?

My guess is that they want to allow a process to only temporarily reduce
the likelihood of getting killed while it's doing something
important.

Greetings,

Andres Freund

-- Andres Freund                       http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services