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-rw-r--r--doc/src/sgml/ref/pgupgrade.sgml4
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/src/sgml/ref/pgupgrade.sgml b/doc/src/sgml/ref/pgupgrade.sgml
index 4e248eae38d..91e80988f8a 100644
--- a/doc/src/sgml/ref/pgupgrade.sgml
+++ b/doc/src/sgml/ref/pgupgrade.sgml
@@ -326,7 +326,9 @@ NET STOP postgresql-9.0
against the old primary and standby clusters. Verify that the
<quote>Latest checkpoint location</> values match in all clusters.
(There will be a mismatch if old standby servers were shut down
- before the old primary.)
+ before the old primary.) Also, change <varname>wal_level</> to
+ <literal>hot_standby</> in the <filename>postgresql.conf</> file on the
+ new primary cluster.
</para>
</step>