diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index 3de489e..bfbb6f7 100644
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -1355,7 +1355,38 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
state
text
- Current WAL sender state
+ Current WAL sender state.
+ Possible values are:
+
+
+
+ backup: The WAL sender is sending a backup.
+
+
+
+
+ catchup: The WAL sender is catching up
+
+
+
+
+ streaming: The WAL sender is catching up with the
+ primary.
+
+
+
+
+ startup: The WAL sender is starting.
+
+
+
+
+ streaming: The WAL sender has caught up with the
+ primary and is streaming changes.
+
+
+
+
sent_location
@@ -1389,7 +1420,27 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
sync_state
text
- Synchronous state of this standby server
+ Synchronous state of this standby server.
+ Possible values are:
+
+
+
+ async: Standby server is asynchronous.
+
+
+
+
+ potential: Standby server can potentially become
+ synchronous.
+
+
+
+
+ sync: Standby server is synchronous.
+
+
+
+