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. +