| From: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
|---|---|
| To: | Gourish Singbal <gourish(at)gmail(dot)com>, "pgsql-admin(at)postgresql(dot)org" <pgsql-admin(at)postgresql(dot)org> |
| Subject: | Re: Autovacuuming |
| Date: | 2006-04-24 18:00:38 |
| Message-ID: | 20060424180038.GG48010@pervasive.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-admin |
On Mon, Apr 24, 2006 at 08:41:55AM -0400, Alvaro Herrera wrote:
> The test for database-wide vacuum is:
>
> database age > big_constant
>
> where:
>
> big_constant = (MaxTransactionId >> 3) * 3 - 100000) = 1610512733
Ok, I'll bite... any idea how (MaxTransactionId >> 3) * 3 was chosen? I
don't see anything about it in vacuum.c...
Also, maybe that should be defined in one place rather than duplicating
it in autovacuum.c?
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Alvaro Herrera | 2006-04-24 19:06:03 | Re: Autovacuuming |
| Previous Message | Martin Marrese | 2006-04-24 17:57:25 | Trouble with pg_dump and sequences |