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From: Tom Lane <tgl@sss.pgh.pa.us>
To: arjunshetty955@gmail.com
cc: pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #17159: PostgreSQL13.3:TPCH-Few queries Failed-no connection
 to the server Vuser
In-reply-to: <17159-662103e706f55863@postgresql.org>
References: <17159-662103e706f55863@postgresql.org>
Comments: In-reply-to PG Bug reporting form <noreply@postgresql.org>
	message dated "Wed, 25 Aug 2021 12:47:05 -0000"
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Date: Wed, 25 Aug 2021 10:19:04 -0400
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PG Bug reporting form <noreply@postgresql.org> writes:
>  EDT [767490] LOG:  background worker "parallel worker" (PID 767794) was
> terminated by signal 9: Killed

You need to prevent the OOM killer from acting.

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

			regards, tom lane