Re: Performance features the 4th

A long time ago, in a galaxy far, far away, pgman@candle.pha.pa.us (Bruce Momjian) wrote:
> Tom Lane wrote:
>> Jan Wieck <JanWieck@Yahoo.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.
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