Joe Conway <mail(at)joeconway(dot)com> writes:
> Tom Lane wrote:
>> where "kill the index entry" involves informing the index AM that it can
>> somehow mark the index entry uninteresting and not to be returned at all
>> during future indexscans.
> Is this a step toward being able to VACUUM indexes?
You mean collapse indexes? No, that's an entirely different issue.
This is about reducing scan overhead when an index contains lots of
pointers to dead-but-not-yet-vacuumed tuples.
regards, tom lane