"Tim Jones" <TJones@optio.com> writes:
>> Which PG version is this exactly? Are you running with any nondefault
>> planner parameters?
> Version 8.1
8.1.what?
> Here are the planner constraints I believe we changed
> effective_cache_size and random_page_cost
Those look reasonably harmless.
My best bet at the moment is that you've got a pretty early 8.1.x
release and are hitting one of the planner bugs that we fixed earlier
this year. Not enough info to say for sure though.
regards, tom lane