| From: | "Jim C(dot) Nasby" <decibel(at)decibel(dot)org> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp>, marty(at)outputservices(dot)com, herve(at)elma(dot)fr, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: PostgreSQL clustering VS MySQL clustering |
| Date: | 2005-01-23 22:21:34 |
| Message-ID: | 20050123222134.GD67721@decibel.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
On Sun, Jan 23, 2005 at 03:40:03PM -0500, Tom Lane wrote:
> There was some discussion in Toronto this week about storing bitmaps
> that would tell VACUUM whether or not there was any need to visit
> individual pages of each table. Getting rid of useless scans through
> not-recently-changed areas of large tables would make for a significant
> reduction in the cost of VACUUM.
FWIW, that's already on the TODO. See also
http://lnk.nu/archives.postgresql.org/142.php.
--
Jim C. Nasby, Database Consultant decibel(at)decibel(dot)org
Give your computer some brain candy! www.distributed.net Team #1828
Windows: "Where do you want to go today?"
Linux: "Where do you want to go tomorrow?"
FreeBSD: "Are you guys coming, or what?"
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Jim C. Nasby | 2005-01-23 22:29:42 | Re: Odd number of rows expected |
| Previous Message | Jim C. Nasby | 2005-01-23 22:18:38 | Re: Cheaper VACUUMing |