| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Gregory Stark <stark(at)enterprisedb(dot)com> |
| Cc: | Josh Berkus <josh(at)agliodbs(dot)com>, Greg Smith <gsmith(at)gregsmith(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Simple postgresql.conf wizard |
| Date: | 2008-11-13 19:34:12 |
| Message-ID: | 491C8134.8020704@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-hackers |
Gregory Stark wrote:
> Josh Berkus <josh(at)agliodbs(dot)com> writes:
>
>> DW:
>> default_statistics_target = 400
>> Mixed:
>> default_statistics_target = 100
>
> You, my friend, are certifiably insane.
I almost fell off the chair because of that comment, but after I stopped
laughing and actually looked at those values, it doesn't seem that
unreasonable. Arbitrary, sure, but not insane. Or do I need stronger
glasses?
A lot of people have suggested raising our default_statistics target,
and it has been rejected because there's some O(n^2) behavior in the
planner, and it makes ANALYZE slower, but it's not that crazy.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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