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-rw-r--r--doc/src/sgml/monitoring.sgml5
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index 933de6fe07f..a2fda4677d7 100644
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -3051,7 +3051,10 @@ description | Waiting for a newly initialized WAL file to reach durable storage
<structfield>num_timed</structfield> <type>bigint</type>
</para>
<para>
- Number of scheduled checkpoints that have been performed
+ Number of scheduled checkpoints due to timeout.
+ Note that checkpoints may be skipped if the server has been idle
+ since the last one, and this value counts both completed and
+ skipped checkpoints
</para></entry>
</row>