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-rw-r--r--doc/src/sgml/protocol.sgml6
1 files changed, 4 insertions, 2 deletions
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index 1a750593707..d32626677d1 100644
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -1682,8 +1682,10 @@ The commands accepted in walsender mode are:
</term>
<listitem>
<para>
- The standby's current xmin. This may be 0, if the standby does not
- support feedback, or is not yet in Hot Standby state.
+ The standby's current xmin. This may be 0, if the standby is
+ sending notification that Hot Standby feedback will no longer
+ be sent on this connection. Later non-zero messages may
+ reinitiate the feedback mechanism.
</para>
</listitem>
</varlistentry>