Re: Slow query after upgrade from 8.2 to 8.4

Kaloyan Iliev Iliev <kaloyan@digsys.bg> writes:
> We recently upgrade our server from PG8.2 to 8.4.
> ...
> Here I will post explain analyze. If you think it is necessary I will
> post the exact query:
> http://explain.depesz.com/s/J0O

Yeah, you need to show the query.  It looks like the performance problem
is stemming from a lot of subselects, but it's not clear why 8.4 would
be handling those worse than 8.2.

            regards, tom lane