Re: Understanding was terminated by signal 9: Killed

For posterity: RDS will definitely allow you to downgrade instance type.

On Wed, Oct 20, 2021 at 1:27 PM Michel SALAIS <msalais(at)msym(dot)fr> wrote:

> Be careful!
> I am not sure but upgrade for a larger instance can't be temporary. I
> think you can't downgrade to the original instance class thereafter...
>
> --
> Michel SALAIS
>
> -----Message d'origine-----
> De : John Scalia <jayknowsunix(at)gmail(dot)com>
> Envoyé : mercredi 20 octobre 2021 01:12
> À : Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
> Cc : Wells Oliver <wells(dot)oliver(at)gmail(dot)com>; pgsql-admin <
> pgsql-admin(at)postgresql(dot)org>
> Objet : Re: Understanding was terminated by signal 9: Killed
>
> You could always change the size of the RDS instance to something larger
> than what it currently is running, even just temporarily.
>
> Sent from my iPad
>
> > On Oct 19, 2021, at 6:01 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >
> > Wells Oliver <wells(dot)oliver(at)gmail(dot)com> writes:
> >> In an RDS instance with 16GB RAM, I ran a long query which started by
> >> setting temp_buffers to 16GB, so I think I plum ran out of memory,
> >> but can anyone point me in a different direction if the following log
> >> messages indicate something else is awry?
> >
> > Yeah, this:
> >
> >> 2021-10-19 21:10:37 UTC::@:[24752]:LOG: server process (PID 25813)
> >> was terminated by signal 9: Killed
> >
> > almost certainly indicates the Linux OOM killer at work. If you were
> > running your own system I'd point you to [1], but I doubt that RDS
> > lets you put your hands on the relevant knobs.
> >
> > regards, tom lane
> >
> > [1]
> > https://www.postgresql.org/docs/current/kernel-resources.html#LINUX-ME
> > MORY-OVERCOMMIT
> >
> >
>
>
>

--
Wells Oliver
wells(dot)oliver(at)gmail(dot)com <wellsoliver(at)gmail(dot)com>