diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index 3f33a1c56c9..c95b879f312 100644
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -1272,6 +1272,14 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
BaseBackupRead
Waiting for base backup to read from a file.
+
+ BaseBackupSync
+ Waiting for data written by a base backup to reach durable storage.
+
+
+ BaseBackupWrite
+ Waiting for base backup to write to a file.
+
BufFileRead
Waiting for a read from a buffered file.