| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Jeff Davis <pgsql(at)j-davis(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Teodor Sigaev <teodor(at)sigaev(dot)ru>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [PATCHES] GIN improvements |
| Date: | 2009-02-04 19:40:03 |
| Message-ID: | 603c8f070902041140h35c2aeo8c4ed79cd16400f8@mail.gmail.com |
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| Lists: | pgsql-hackers pgsql-patches |
On Wed, Feb 4, 2009 at 1:39 PM, Jeff Davis <pgsql(at)j-davis(dot)com> wrote:
> On Mon, 2009-02-02 at 20:38 -0500, Tom Lane wrote:
>> Also, I really think it's a pretty bad idea to make index cost
>> estimation depend on the current state of the index's pending list
>> --- that state seems far too transient to base plan choices on.
>
> I'm confused by this. Don't we want to base the plan choice on the most
> current data, even if it is transient?
>
> Regards,
> Jeff Davis
Well, there's nothing to force that plan to be invalidated when the
state of the pending list changes, is there?
...Robert
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