Bruce,
> We never actually considred undo, but high UPDATE activity was one of
> the areas we historically handled poorly compared to undo systems, and
> undo would have been one way to improve that area. I think with HOT we
> have improved high UPDATE activity enough that the undo benefits are no
> longer attractive (and of course the undo disadvantages were never
> attractive).
>
If you're asking if we should remove the TODO (is there one?) and
replace it with a FAQ item called "Why PostgreSQL doesn't have an UNDO
LOG", then my vote is "yes".
--Josh
