Greg Stark <[EMAIL PROTECTED]> writes:
> I don't see how the lack of deletions is relevant to needing vacuum-cycle-ID.
> AFAICT there's still a risk that someone will come along and do a page split
> underneath this scan and if the page is to the left of the scan it will be
> missed.

Well, if there are active insertions or deletions happening in parallel
with the scan, the tuple count is going to be at best approximate
anyway, no?  So there's no need to be tense about ensuring we visit
every single index tuple.  We do want to hit all the pages so we can
clean up any recyclable pages, but that's not a problem.

                        regards, tom lane

---------------------------(end of broadcast)---------------------------
TIP 1: if posting/reading through Usenet, please send an appropriate
       subscribe-nomail command to [EMAIL PROTECTED] so that your
       message can get through to the mailing list cleanly

Reply via email to