From: Tom Lane <tgl@sss.pgh.pa.us>
To: =?UTF-8?B?TGF0aWYgZ8O8ZMO8aw==?= <latifguduk@gmail.com>
cc: pgsql-admin@lists.postgresql.org
Subject: Re: Postgresql db crash and recovery mode
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Comments: In-reply-to =?UTF-8?B?TGF0aWYgZ8O8ZMO8aw==?= <latifguduk@gmail.com>
	message dated "Tue, 05 Oct 2021 17:52:03 +0300"
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Date: Tue, 05 Oct 2021 10:58:27 -0400
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=3D?UTF-8?B?TGF0aWYgZ8O8ZMO8aw=3D=3D?=3D <latifguduk@gmail.com> writes:
> One of our production database crashed and got FATAL:  the database syst=
em
> is in recovery mode. You can find OS version and db version info below.

> 2021-10-05 17:01:08.103 +03     20248  LOG:  server process (PID 158856)
> was terminated by signal 9: Killed

That is an external kill.  If you didn't do it manually, it's most likely
the Linux OOM killer in action.  See

https://www.postgresql.org/docs/current/kernel-resources.html#LINUX-MEMORY=
-OVERCOMMIT

			regards, tom lane