pgsql: Improve the documentation on 8.4 visibility map related VACUUM

From: heikki(at)postgresql(dot)org (Heikki Linnakangas)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Improve the documentation on 8.4 visibility map related VACUUM
Date: 2009-04-23 10:09:11
Message-ID: 20090423100911.9B84D75331D@cvs.postgresql.org
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Log Message:
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Improve the documentation on 8.4 visibility map related VACUUM changes.
Explain how vacuum_freeze_table_age should be tuned, and how it relates
to the other settings. Mention that vacuum_freeze_table_age also affects
when autovacuum scans the whole table.

Modified Files:
--------------
pgsql/doc/src/sgml:
maintenance.sgml (r1.92 -> r1.93)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/maintenance.sgml?r1=1.92&r2=1.93)

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