| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Idea for getting rid of VACUUM FREEZE on cold pages |
| Date: | 2010-05-26 18:46:39 |
| Message-ID: | 4BFD6C8F.6070009@agliodbs.com |
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| Lists: | pgsql-hackers |
> In theory, until any tuple on the page is inserted/updated/deleted
> again. However, we've been operating on the assumption that it's always
> safe to clear any bit in the visibility map, without affecting
> correctness. I would not like to give up that assumption, it makes life
> easier.
It wouldn't affect correctness, it would just force that page to be
vacuumed-and-frozen. I think I can make this work, let me just hammer
it out.
--
-- Josh Berkus
PostgreSQL Experts Inc.
http://www.pgexperts.com
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