| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Gregory Stark <stark(at)enterprisedb(dot)com>, Koichi Suzuki <koichi(dot)szk(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Proposal of PITR performance improvement for 8.4. |
| Date: | 2008-10-28 21:56:55 |
| Message-ID: | 1225231015.3971.268.camel@ebony.2ndQuadrant |
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| Lists: | pgsql-hackers |
On Tue, 2008-10-28 at 17:40 -0400, Bruce Momjian wrote:
> Gregory Stark wrote:
> > Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
> >
> > > I'm happy with the idea of a readahead process. I thought we were
> > > implementing a BackgroundReader process for other uses. Is that dead
> > > now?
> >
> > You and Bruce seem to keep resurrecting that idea. I've never liked it -- I
> > always hated that in Oracle and thought it was a terrible kludge.
>
> I didn't think I was promoting the separate reader process after you had
> the posix_fadvise() idea.
I think Greg is misinterpreting our occasional lack of exactness as
disagreement. The end solution is the goal, not any of the discussed
mechanisms. It's always good to have a name for it that sums up the
goals rather than the methods e.g. frequent update optimisation rather
than update-in-place.
It would be good if the solutions for normal running and recovery were
similar. Greg, please could you look into that?
--
Simon Riggs www.2ndQuadrant.com
PostgreSQL Training, Services and Support
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