| From: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
|---|---|
| To: | Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com> |
| Cc: | Bruce Momjian <bruce(at)momjian(dot)us>, Heikki Linnakangas <heikki(at)enterprisedb(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Florian Pflug <fgp(dot)phlo(dot)org(at)gmail(dot)com>, Gregory Stark <stark(at)enterprisedb(dot)com>, PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org> |
| Subject: | Re: HOT patch - version 15 |
| Date: | 2007-09-10 20:05:58 |
| Message-ID: | 1189454758.4281.328.camel@ebony.site |
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| Thread: | |
| Lists: | pgsql-patches |
On Tue, 2007-09-11 at 01:22 +0530, Pavan Deolasee wrote:
> I think the only difference is that the quick pruning does not mark
> intermediate tuples ~LP_USED and hence we may avoid WAL logging.
Sounds great.
> Btw, I am not too enthusiastic about quick pruning because it leaves
> behind dead heap-only tuples which are not reachable from any root
> heap tuples. Not that we can't handle them, but I am worried about
> making such changes right now unless we are sure about the benefits.
> We can always tune and tweak in 8.4
...but we don't want to reach them. They are waiting to be removed.
--
Simon Riggs
2ndQuadrant http://www.2ndQuadrant.com
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