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Il 05/12/2013 17:16, Andy Colson ha scritto:
Setting vacuum_freeze_table_age to 0 forces VACUUM to always scan all
pages, effectively ignoring the visibility map. In this way a scan of
the whole table is done, ensuring all old XIDs are replaced by FrozenXID.
vacuum_freeze_table_age is a parameter with context 'user', meaning
that you can set it during a session and run a "vacuum freeze" with
the modified setting.
Giuseppe.
- --
Giuseppe Broccolo - 2ndQuadrant Italy
PostgreSQL Training, Services and Support
giuseppe.broccolo@2ndQuadrant.it | www.2ndQuadrant.it
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