Re: Understanding was terminated by signal 9: Killed

Wells 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, 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-MEMORY-OVERCOMMIT