| From: | Rod Taylor <rbt(at)rbt(dot)ca> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Scott Marlowe <scott(dot)marlowe(at)ihs(dot)com>, PostgreSQL Development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Very poor estimates from planner |
| Date: | 2003-11-06 00:02:21 |
| Message-ID: | 1068076940.53233.11.camel@jester |
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| Lists: | pgsql-hackers |
On Wed, 2003-11-05 at 18:57, Tom Lane wrote:
> Rod Taylor <rbt(at)rbt(dot)ca> writes:
> >> I'm not sure if that will actually change the default_statistics_target
>
> > Hmm.. I was under the impression that it would work for any tables that
> > haven't otherwise been overridden.
>
> It will. I think Scott is recalling the original circa-7.2
> implementation, where it wouldn't. If you're unsure that you
> affected it, check out the actual sizes of the array values in pg_stats.
The plan does change when I remove it and re-analyze it.
Either way, it's off by a factor of a 10^5 or so.
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