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From: Chris Hoover <revoohc@gmail.com>
To: pgsql-admin@postgresql.org Admin <pgsql-admin@postgresql.org>
Subject: 8.3 Autovacuum Questions
Date: Mon, 14 Jul 2008 16:26:08 -0400
Message-ID: <1d219a6f0807141326p16d86505o84642b8d49fa6ad8@mail.gmail.com> (raw)

I just have a couple of quick questions about 8.3 and Autovacuum.

1.  When autovacuum chooses to vacuum a table, the entire table is vacuumed,
and not just a specified percentage of the table.  Correct?

2.  There is no way, without turning autovacuum off, of excluding
vacuum/analyze during a specific period of time (say during a known peak
usage period).

3.  If I have a PostgreSQL cluster with 10 databases, does
autovacuum_max_workers=3 mean I have a possibility of 3 total workers or 30
workers (i.e. autovacuum_max_workers * number of db's)?

Thanks,

Chris

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