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-rw-r--r--doc/src/sgml/config.sgml4
-rw-r--r--doc/src/sgml/perform.sgml4
2 files changed, 7 insertions, 1 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 0c9128a55d0..effc60c07b3 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -2720,6 +2720,10 @@ include_dir 'conf.d'
data from a base backup and the WAL logs, so <literal>replica</literal> or
higher must be used to enable WAL archiving
(<xref linkend="guc-archive-mode"/>) and streaming replication.
+ Note that changing <varname>wal_level</varname> to
+ <literal>minimal</literal> makes any base backups taken before
+ unavailable for archive recovery and standby server, which may
+ lead to database loss.
</para>
<para>
In <literal>logical</literal> level, the same information is logged as
diff --git a/doc/src/sgml/perform.sgml b/doc/src/sgml/perform.sgml
index 70cb5a62e15..e0d3f246e9a 100644
--- a/doc/src/sgml/perform.sgml
+++ b/doc/src/sgml/perform.sgml
@@ -1745,7 +1745,9 @@ SELECT * FROM x, y, a, b, c WHERE something AND somethingelse;
<xref linkend="guc-wal-level"/> to <literal>minimal</literal>,
<xref linkend="guc-archive-mode"/> to <literal>off</literal>, and
<xref linkend="guc-max-wal-senders"/> to zero.
- But note that changing these settings requires a server restart.
+ But note that changing these settings requires a server restart,
+ and makes any base backups taken before unavailable for archive
+ recovery and standby server, which may lead to database loss.
</para>
<para>