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Doc: update VACUUM VERBOSE freezing tip. 

VACUUM VERBOSE/autovacuuming logging have reported on the number of
pages frozen by VACUUM since commit d977ffd9 added that capability.
This information is directly related to relfrozenxid advancement, so
update an older tip from the documentation about how relfrozenxid is
reported on by the same instrumentation code.  Now the tip directly
mentions newly frozen pages, too.
This commit is contained in:
Peter Geoghegan 2023-01-25 14:31:41 -08:00
parent 4d41799261
commit 1a8e72bff7
1 changed files with 3 additions and 2 deletions
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doc/src/sgml/maintenance.sgml
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@ -643,8 +643,9 @@ SELECT datname, age(datfrozenxid) FROM pg_database;
parameter is specified, <command>VACUUM</command> prints various
statistics about the table. This includes information about how
<structfield>relfrozenxid</structfield> and
<structfield>relminmxid</structfield> advanced. The same details appear
in the server log when autovacuum logging (controlled by <xref
<structfield>relminmxid</structfield> advanced, and the number of
newly frozen pages. The same details appear in the server log when
autovacuum logging (controlled by <xref
linkend="guc-log-autovacuum-min-duration"/>) reports on a
<command>VACUUM</command> operation executed by autovacuum.
</para>