Simon Riggs <simon@2ndquadrant.com> writes:
> On Tue, 2008-04-01 at 10:22 -0400, Tom Lane wrote:
>> In the fourth, if we actually believed this was a problem we'd
>> need to redesign VACUUM too, as it does the same thing.
> VACUUM waits until nobody else has the buffer pinned, so lock contention
> is much less of a consideration there. Plus it rearranges the block,
> which is hard to do one tuple at a time even if we wanted to.
That's the second scan. The first scan acts exactly like Pavan is
proposing for ANALYZE.
regards, tom lane