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-rw-r--r--doc/src/sgml/monitoring.sgml4
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index 0960f5ba94a..bacc09cb8af 100644
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -1022,7 +1022,9 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
it may or may not be <literal>waiting</literal> on some event. If the state
is <literal>active</literal> and <structfield>wait_event</structfield> is non-null, it
means that a query is being executed, but is being blocked somewhere
- in the system.
+ in the system. To keep the reporting overhead low, the system does not
+ attempt to synchronize different aspects of activity data for a backend.
+ As a result, ephemeral discrepancies may exist between the view's columns.
</para>
</note>