Note that PostgreSQL doesn't auto-update clustered indexes. i.e. they
deteriorate over time, and require being re-clustered after a while.
On Mon, 2006-09-25 at 17:27, adey wrote:
> A good guide for a clustered index is:-
> Will the index be unique, static and narrow.
> If not, avoid clustered indexing as they require extra work on disk to
> maintain their sequence.
>
>
> On 9/26/06, Chris Hoover <revoohc@gmail.com> wrote:
> I am looking to squeeze a bit more speed out of my database by
> clustering most of my tables. However, on tables with
> multiple indexes, how is the best way to choose the index. I
> am thinking I want to use the index with the largest
> pg_stat_user_indexes.idx_tup_read. Would this be correct? If
> not, what column(s) and views should I be looking at to find
> the most popular index?
>
> Secondly, I have some partial indexes on a very active table,
> and it tends to have the highest idx_tup_read for that table.
> Is is possible to cluster on a partial index?
>
> Thanks,
>
> Chris
>