Herve,
> What can I do to get better results ?? (configuration option, and/or
> hardware update ?)
> What can I give you to get more important informations to help me ?
1) What PostgreSQL version are you using?
2) What's your VACUUM, ANALYZE, VACUUM FULL, REINDEX schedule?
3) Can you list the non-default settings in your PostgreSQL.conf?
Particularly, shared_buffers, sort_mem, checkpoint_segments, estimated_cache,
and max_fsm_pages?
--
Josh Berkus
Aglio Database Solutions
San Francisco