From: Fujii Masao <fujii@postgresql.org>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: doc: Clarify when backend_xmin in pg_stat_replication can be NUL
Date: Fri, 17 Oct 2025 05:04:57 +0000
Message-ID: <E1v9ce9-0025mB-2d@gemulon.postgresql.org> (raw)
doc: Clarify when backend_xmin in pg_stat_replication can be NULL.
Improve the documentation of pg_stat_replication to explain when
the backend_xmin column becomes NULL. This happens when
a replication slot is used (the xmin is then shown in pg_replication_slots)
or when hot_standby_feedback is disabled.
Author: Renzo Dani <arons7@gmail.com>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/CA+XOKQAMXzskpdUmj2sg03_5fmiXc2Gs0r3TX1_rmcFcqh+=xQ@mail.gmail.com
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/e64aa1a39d4b8a9502be8ed8dfd67efd6f6acf28
Modified Files
--------------
doc/src/sgml/monitoring.sgml | 4 ++++
1 file changed, 4 insertions(+)
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To: pgsql-committers@postgresql.org
Cc: fujii@postgresql.org, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: doc: Clarify when backend_xmin in pg_stat_replication can be NUL
In-Reply-To: <E1v9ce9-0025mB-2d@gemulon.postgresql.org>
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