diff --git a/doc/src/sgml/maintenance.sgml b/doc/src/sgml/maintenance.sgml
index 9389eef973..2bfa05b8bc 100644
--- a/doc/src/sgml/maintenance.sgml
+++ b/doc/src/sgml/maintenance.sgml
@@ -924,10 +924,9 @@ vacuum insert threshold = vacuum base insert threshold + vacuum insert scale fac
as this may allow
tuples to be frozen by earlier vacuums. The number of obsolete tuples and
the number of inserted tuples are obtained from the cumulative statistics system;
- it is a semi-accurate count updated by each UPDATE,
- DELETE and INSERT operation. (It is
- only semi-accurate because some information might be lost under heavy
- load.) If the relfrozenxid value of the table
+ it is an eventually-consistent count updated by each UPDATE,
+ DELETE and INSERT operation.
+ If the relfrozenxid value of the table
is more than vacuum_freeze_table_age transactions old,
an aggressive vacuum is performed to freeze old tuples and advance
relfrozenxid; otherwise, only pages that have been modified