diff --git a/doc/src/sgml/high-availability.sgml b/doc/src/sgml/high-availability.sgml
index aa780d360dc..6c0679b0a8b 100644
--- a/doc/src/sgml/high-availability.sgml
+++ b/doc/src/sgml/high-availability.sgml
@@ -890,14 +890,20 @@ primary_conninfo = 'host=192.168.1.50 port=5432 user=foo password=foopass'
You can retrieve a list of WAL sender processes via the
-
- pg_stat_replication view. Large differences between
+ view. Large differences between
pg_current_wal_lsn and the view's sent_lsn field
might indicate that the master server is under heavy load, while
differences between sent_lsn and
pg_last_wal_receive_lsn on the standby might indicate
network delay, or that the standby is under heavy load.
+
+ On a hot standby, the status of the WAL receiver process can be retrieved
+ via the view. A large
+ difference between pg_last_wal_replay_lsn and the
+ view's received_lsn indicates that WAL is being
+ received faster than it can be replayed.
+