Re: Performance features the 4th

Christopher Browne wrote:
> A long time ago, in a galaxy far, far away, pgman(at)candle(dot)pha(dot)pa(dot)us (Bruce Momjian) wrote:
> > Tom Lane wrote:
> >> Jan Wieck <JanWieck(at)Yahoo(dot)com> writes:
> >> > As a matter of fact, people who have performance problems are likely to
> >> > be the same who have upgrade problems. And as Gaetano pointed out
> >> > correctly, we will see wildforms with one or the other feature applied.
> >>
> >> I'd believe that for patches of the size of my original VACUUM-delay
> >> hack (or even a production-grade version of same, which'd probably be
> >> 10x larger). The kind of wholesale rewrite you are currently proposing
> >> is much too large to consider folding back into 7.4.*, IMHO.
> >
> > What Jan could do is to have a 7.4 patch available that people can test,
> > and he can improve it during the 7.5 development cycle with feedback
> > from users.
>
> The thing is, there are two patches that seem likely to be of
> interest:
>
> a) There's the ARC changes, which really feel like they are 7.5
> development, not likely to be readily backportable;
>
> b) On the other hand, a "simple delay" on the VACUUM seems likely
> to be useful, and reasonably backportable.
>
> And these are two quite different things, both of which may be worth
> having.

Yes, Tom has already said "b" is possible in a 7.4.X subrelease, but not
for 7.4.0.

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