| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Mark Wong" <markwkm(at)gmail(dot)com> |
| Cc: | "Greg Smith" <gsmith(at)gregsmith(dot)com>, "Heikki Linnakangas" <heikki(dot)linnakangas(at)enterprisedb(dot)com>, "Gregory Stark" <stark(at)enterprisedb(dot)com>, "Josh Berkus" <josh(at)agliodbs(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Simple postgresql.conf wizard |
| Date: | 2008-12-19 13:19:01 |
| Message-ID: | 6697.1229692741@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
"Mark Wong" <markwkm(at)gmail(dot)com> writes:
> On Mon, Dec 8, 2008 at 4:34 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> "Mark Wong" <markwkm(at)gmail(dot)com> writes:
>>> On Tue, Dec 2, 2008 at 2:25 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>>> Are any of the queries complicated enough to trigger GEQO planning?
> Sorry for the delay in responding, here's the queries and the number
> of tables in each:
> [ worst case is ]
> Q8: 8 (7 uniqie) + 1 temp table
Well, geqo_threshold is 12 by default, so that theory loses ...
regards, tom lane
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