| From: | Glen Parker <glenebob(at)nwlink(dot)com> |
|---|---|
| To: | Postgres General <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Second attempt, roll your own autovacuum |
| Date: | 2006-12-18 22:22:12 |
| Message-ID: | 45871494.1000800@nwlink.com |
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| Lists: | pgsql-general pgsql-hackers |
Alvaro Herrera wrote:
> Glen Parker wrote:
>
>> The trouble now is, I don't see how to reset the statistics. My
>> assumption was that vacuum did it, but that appears to be false. How
>> does autovacuum do it? Can I do it with SQL?
>
> Huh, reset what statistics? Autovacuum does not reset anything. What
> statistics are you using? The number of dead tuples _should_ show as
> zero on the stat system after a vacuum, certainly.
pg_stat_user_tables.[n_tup_ins|n_tup_upd|n_tup_del]. Hmm maybe I'm
doing this all wrong then. Is there a way to find the estimated dead
tuples from SQL, the same number autovacuum looks at?
-Glen
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