From: "Michel SALAIS" <msalais@msym.fr>
To: "'John Scalia'" <jayknowsunix@gmail.com>,
	"'Tom Lane'" <tgl@sss.pgh.pa.us>
Cc: "'Wells Oliver'" <wells.oliver@gmail.com>,
	"'pgsql-admin'" <pgsql-admin@postgresql.org>
References: <2009137.1634680908@sss.pgh.pa.us>
 <AEEF347B-39EC-41FC-8AC9-2AFA54F71391@gmail.com>
In-Reply-To: <AEEF347B-39EC-41FC-8AC9-2AFA54F71391@gmail.com>
Subject: RE: Understanding was terminated by signal 9: Killed
Date: Wed, 20 Oct 2021 22:27:23 +0200
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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@gmail.com>=20
Envoy=C3=A9 : mercredi 20 octobre 2021 01:12
=C3=80 : Tom Lane <tgl@sss.pgh.pa.us>
Cc : Wells Oliver <wells.oliver@gmail.com>; pgsql-admin =
<pgsql-admin@postgresql.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@sss.pgh.pa.us> wrote:
>=20
> =EF=BB=BFWells Oliver <wells.oliver@gmail.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,=20
>> but can anyone point me in a different direction if the following log =

>> messages indicate something else is awry?
>=20
> Yeah, this:
>=20
>> 2021-10-19 21:10:37 UTC::@:[24752]:LOG:  server process (PID 25813)=20
>> was terminated by signal 9: Killed
>=20
> almost certainly indicates the Linux OOM killer at work.  If you were=20
> running your own system I'd point you to [1], but I doubt that RDS=20
> lets you put your hands on the relevant knobs.
>=20
>            regards, tom lane
>=20
> [1]=20
> https://www.postgresql.org/docs/current/kernel-resources.html#LINUX-ME
> MORY-OVERCOMMIT
>=20
>=20