diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index c3d6f22f3b..cd65cced47 100644
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -1044,7 +1044,8 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
CLogTruncationLock
- Waiting to truncate the write-ahead log or waiting for write-ahead log truncation to finish.
+ Waiting to execute txid_status or update
+ the oldest transaction id available to it.
clog