"Julian Scarfe" <julian.scarfe@ntlworld.com> writes:
> I've got a box running 7.2.1 (yes, I know :-() in which an index for a
> rapidly turning over (and regularly vacuumed) table is growing steadily in
> size. The index in question is on a timestamp field that is just set to
> now() on the entry of the row, to enable the query that clears out old data
> to an archive to run efficiently. Reindexing shrinks it back to a
> reasonable size. Other indexes reach an equilibrium size and stay there. The
> behaviour is fine on a system running 7.4.x: the index stays at a sensible
> number of pages.
That's exactly what I'd expect ...
regards, tom lane