Date: Fri, 8 Oct 2021 19:48:21 -0300
From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: Wells Oliver <wells.oliver@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Bruce Momjian <bruce@momjian.us>,
	pgsql-admin <pgsql-admin@postgresql.org>,
	Jeremy Schneider <schnjere@amazon.com>
Subject: Re: 13.4 on RDS, SSL SYSCALL EOF on restore
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On 2021-Oct-08, Alvaro Herrera wrote:

> On 2021-Oct-08, Wells Oliver wrote:
> 
> > Dug out some more logging:
> 
> > 2021-10-08 20:35:08 UTC::@:[12682]:LOG:  server process (PID 3970) was terminated by signal 9: Killed
> > 2021-10-08 20:35:08 UTC::@:[12682]:DETAIL:  Failed process was running: CREATE INDEX ...
> 
> So what's happening here is that the instance is running out of RAM
> while creating some index, and the kernel is killing the process.  I
> would probably blame the combination of shared_buffers=4GB with
> maintenance_work_mem=2GB, together with the instance's total RAM.

Also, maybe RDS could be smarter about this situation.

-- 
Álvaro Herrera              Valdivia, Chile  —  https://www.EnterpriseDB.com/
"La primera ley de las demostraciones en vivo es: no trate de usar el sistema.
Escriba un guión que no toque nada para no causar daños." (Jakob Nielsen)