| From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
|---|---|
| To: | Chris Hoover <revoohc(at)gmail(dot)com> |
| Cc: | "pgsql-admin(at)postgresql(dot)org Admin" <pgsql-admin(at)postgresql(dot)org> |
| Subject: | Re: 8.3 Autovacuum Questions |
| Date: | 2008-07-14 20:29:33 |
| Message-ID: | 20080714202933.GK4050@alvh.no-ip.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-admin |
Chris Hoover escribió:
> 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?
Yes.
> 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).
Nope, no way. (You could have a script to update the
pg_autovacuum.enabled flag, and change it using cron.)
> 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)?
3 workers total.
--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Chris Hoover | 2008-07-14 20:34:41 | Re: 8.3 Autovacuum Questions |
| Previous Message | Chris Hoover | 2008-07-14 20:26:08 | 8.3 Autovacuum Questions |