| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Jesper Krogh <jesper(at)krogh(dot)cc> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Josh Berkus <josh(at)agliodbs(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Idea for getting rid of VACUUM FREEZE on cold pages |
| Date: | 2010-05-27 07:17:38 |
| Message-ID: | 4BFE1C92.1000801@enterprisedb.com |
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| Lists: | pgsql-hackers |
On 27/05/10 08:56, Jesper Krogh wrote:
> Just a thought. Wouldn't a All-visible bit also enable index only scans
> to some degree?
Yes. In fact, that's one reason I implemented the visibility map in the
first place. I started working on index-only scans based on that last
year, if you search the archives for index-only scans you'll find those
discussions.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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