From 6ec4b38af5e1f5d90e8de7ef2ac073761a362b5d Mon Sep 17 00:00:00 2001
From: Renzo Dani <arons7@gmail.com>
Date: Wed, 15 Oct 2025 17:31:45 +0200
Subject: [PATCH v2 1/2] Extend documentation for
 pg_stat_replication.backend_xmin

---
 doc/src/sgml/monitoring.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index dc4fc29466d..c616571e4df 100644
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -1287,6 +1287,7 @@ description | Waiting for a newly initialized WAL file to reach durable storage
       <para>
        This standby's <literal>xmin</literal> horizon reported
        by <xref linkend="guc-hot-standby-feedback"/>.
+       This field will be null if a replication slot is used; in that case, the xmin is available through <link linkend="view-pg-replication-slots">pg_replication_slots</link>.
       </para></entry>
      </row>
 
-- 
2.43.0