On Friday 29 Nov 2002 4:45 am, Rudi Starcevic wrote:
> Hi,
>
> I think I've found what I need to know.
> From techdocs.postgresql.org
>
> >> Every you run an INSERT, UPDATE, or DELETE on an indexed table,
>
> PostgreSQL must update all of the table's indexes to reflect the new
> data (unlike some
>
> >> RDBMSs, PostgreSQL updates indexes immediately so they never get out
> of synch with the data).
Yep - the ANALYSE updates the statistics the planner uses. So - you should
analyse when a noticable portion of your data has changed. If you had 3000
users and batch inserted 1000 users you'd probably want to ANALYSE.
-- Richard Huxton