Hi, hackers
When I try to change wal_level to minimal and restart the database, it complains
max_wal_senders > 0.
2022-03-03 10:10:16.938 CST [6389] FATAL: WAL streaming (max_wal_senders > 0)
requires wal_level "replica" or "logical"
However, the documentation about wal_level [1] doesn't mentation this.
How about adding a sentence to describe how to set max_wal_senders when
setting wal_level to minimal?
[1] https://www.postgresql.org/docs/devel/runtime-config-wal.html
--
Regrads,
Japin Li.
ChengDu WenWu Information Technology Co.,Ltd.
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 7ed8c82a9d..3f5ecc4a04 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -2776,6 +2776,10 @@ include_dir 'conf.d'
unavailable for archive recovery and standby server, which may
lead to data loss.
</para>
+ <para>
+ When changing <varname>wal_level</varname> to <literal>minimal</literal>,
+ you must set the <xref linkend="guc-max-wal-senders"/> parameter to 0.
+ </para>
<para>
In <literal>logical</literal> level, the same information is logged as
with <literal>replica</literal>, plus information needed to allow
