Re: Understanding was terminated by signal 9: Killed

[Wells Oliver <wells.oliver@xxxxxxxxx>]

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

On Wed, Oct 20, 2021 at 1:27 PM Michel SALAIS <msalais@xxxxxxx> 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@xxxxxxxxx>
Envoyé : mercredi 20 octobre 2021 01:12
À : Tom Lane <tgl@xxxxxxxxxxxxx>
Cc : Wells Oliver <wells.oliver@xxxxxxxxx>; pgsql-admin <pgsql-admin@xxxxxxxxxxxxxx>
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@xxxxxxxxxxxxx> wrote:
>
> Wells Oliver <wells.oliver@xxxxxxxxx> 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.oliver@xxxxxxxxx