diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 0c7a9082c5..6718e325fc 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -8319,7 +8319,9 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
measure the overhead of timing on your system.
I/O timing information is
displayed in
- pg_stat_database, in the output of
+ pg_stat_database and
+
+ pg_stat_io, in the output of
when the BUFFERS option
is used, in the output of when
the VERBOSE option is used, by autovacuum