Re: Rapidly decaying performance repopulating a large table

On Tue, Apr 22, 2008 at 5:04 PM, Scott Marlowe <scott.marlowe@gmail.com> wrote:
>  Normally, after the first 50,000 or so the plan won't likely change
>  due to a new analyze, so you could probably just analyze after 50k or
>  so and get the same performance.  If the problem is a bad plan for the
>  inserts / copies.
>
>  also, non-indexed foreign keyed fields can cause this problem.
>

Analyzing after the first 50k or so is easy enough, then; thanks for
the suggestion.

Foreign keys are definitely indexed (actually referencing a set of
columns that the foreign table is UNIQUE on).

Any other suggestions? COPY times alone are pretty much quadrupling my
table-rebuild runtime, and I can interrupt the current rebuild to try
things pretty much at a whim (nothing else uses the DB while a rebuild
is happening), so I'm pretty much game to try any reasonable
suggestions anyone has.

--
- David T. Wilson
david.t.wilson@gmail.com