| From: | Mark Reid <mail(at)markreid(dot)org> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, "Matthew T(dot) O'Connor" <matthew(at)zeut(dot)net>, pgsql-bugs(at)postgresql(dot)org, Jan Wieck <JanWieck(at)Yahoo(dot)com> |
| Subject: | Re: pg_autovacuum: short, wide tables |
| Date: | 2005-07-08 17:19:49 |
| Message-ID: | 42CEB5B5.1090703@markreid.org |
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| Thread: | |
| Lists: | pgsql-bugs |
>>I'm not proposing it for 8.1 though ...
>>
>>
>
>Well, why not? Arguably Mark's problem is a bug, and it's not too late
>to address bugs.
>
>
FWIW, I'd be satisfied with a warning in the autovacuum docs about this
corner case.
>I'm not sure about the idea of not vacuuming the toast table when we
>decide to vacuum the main table.
>
>
If you promote toast tables to autovacuum candidates that can be
vacuumed independently, I think autovacuum doesn't need to do both when
it does the main table. This would potentially improve performance by
minimizing the amount of work that needs to be done when a vacuum is
necessary. OTOH, you can't stop regular vacuum from including the toast
table otherwise way more people would start bugging you :)
-Mark.
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