| From: | "Tyrrill, Ed" <tyrrill_ed(at)emc(dot)com> |
|---|---|
| To: | "Michael Glaesemann" <grzm(at)seespotcode(dot)net> |
| Cc: | <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Very slow left outer join |
| Date: | 2007-05-30 16:22:46 |
| Message-ID: | A23190A408F7094FAF446C1538222F7603F9811F@avaexch01.avamar.com |
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| Lists: | pgsql-performance |
Michael Glaesemann <grzm(at)seespotcode(dot)net> writes:
> Off the cuff, when was the last time you vacuumed or ran ANALYZE?
> Your row estimates look off by a couple orders of magnitude. With up-
> to-date statistics the planner might do a better job.
>
> As for any other improvements, I'll leave that to those that know
> more than I. :)
>
> Michael Glaesemann
> grzm seespotcode net
The script that imports data into these tables runs a vacuum analyze at
the end so there has been no new data added to the tables since the last
time vacuum analyze was run.
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