On 31/01/2023 20:16, Greg Stark wrote:
A hint or something just in
that case might be enough?

It seems to be a -1 ;

let's try to improve the documentation, with the attached patch

best regards,

--
Sébastien
diff --git a/doc/src/sgml/backup.sgml b/doc/src/sgml/backup.sgml
index be05a33205..7e26b51031 100644
--- a/doc/src/sgml/backup.sgml
+++ b/doc/src/sgml/backup.sgml
@@ -1332,7 +1332,8 @@ restore_command = 'cp /mnt/server/archivedir/%f %p'
     you like, add comments to a history file to record your own notes about
     how and why this particular timeline was created.  Such comments will be
     especially valuable when you have a thicket of different timelines as
-    a result of experimentation.
+    a result of experimentation. In both WAL segment file names and history files,
+    the timeline ID number is expressed in hexadecimal.
    </para>
 
    <para>
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index e5c41cc6c6..3b5d041d92 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -4110,7 +4110,9 @@ restore_command = 'copy "C:\\server\\archivedir\\%f" "%p"'  # Windows
         current when the base backup was taken.  The
         value <literal>latest</literal> recovers
         to the latest timeline found in the archive, which is useful in
-        a standby server.  <literal>latest</literal> is the default.
+        a standby server. A numerical value expressed in hexadecimal must be
+        prefixed with <literal>0x</literal>, for example <literal>0x11</literal>.
+        <literal>latest</literal> is the default. 
        </para>
 
        <para>
diff --git a/doc/src/sgml/ref/pg_waldump.sgml b/doc/src/sgml/ref/pg_waldump.sgml
index 343f0482a9..4ae8f2ebdd 100644
--- a/doc/src/sgml/ref/pg_waldump.sgml
+++ b/doc/src/sgml/ref/pg_waldump.sgml
@@ -215,7 +215,8 @@ PostgreSQL documentation
        <para>
         Timeline from which to read WAL records. The default is to use the
         value in <replaceable>startseg</replaceable>, if that is specified; otherwise, the
-        default is 1.
+        default is 1. The value must be expressed in decimal, contrary to the hexadecimal 
+        value given in WAL segment file names and history files.
        </para>
       </listitem>
      </varlistentry>

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