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From: Tom Lane <tgl@sss.pgh.pa.us>
To: teng_wang13@163.com
cc: pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #17538: Dynamically updating log_hostname not affect the
 disconnection log
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References: <17538-74a88f3ab5b55670@postgresql.org>
Comments: In-reply-to PG Bug reporting form <noreply@postgresql.org>
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Date: Mon, 04 Jul 2022 13:23:41 -0400
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PG Bug reporting form <noreply@postgresql.org> writes:
> The parameter could be updated on the fly. However, dynamically updating
> log_hostname did not affect the disconnection log.

This is operating as designed: the host name is captured at connection
time, and the log_disconnection message just repeats it.  What you
propose would not be an improvement, because it'd make it impossible
to match up log_disconnections messages with log_connections ones.

			regards, tom lane