On 2/7/12 8:14 AM, Alvaro Herrera wrote:
> Having one sequence for each toast table could be wasteful though. I
> mean, sequences are not the best use of shared buffer cache currently.
> If we could have more than one sequence data in a shared buffer page,
> things would be different. Not sure how serious this really is.
This would actually be an argument for supporting multiple page sizes... too bad that's such a beast.
FWIW, from our most complex production database:
cnuapp_prod@postgres08.obr=# select relkind, count(*) from pg_class group by 1; relkind | count
---------+------- S | 522 r | 1058 t | 698 i | 2894 v | 221 c | 12
(6 rows)
--
Jim C. Nasby, Database Architect jim@nasby.net
512.569.9461 (cell) http://jim.nasby.net
