| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Jasmin Dizdarevic <jasmin(dot)dizdarevic(at)gmail(dot)com> |
| Cc: | Craig Ringer <craig(at)postnewspapers(dot)com(dot)au>, pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: Performance of NOT IN and <> with PG 9.0.4 |
| Date: | 2011-05-24 19:14:23 |
| Message-ID: | BANLkTim_EvVzTzzbbOhmDQGPMUoc0fNLFA@mail.gmail.com |
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| Lists: | pgsql-sql |
On Tue, May 24, 2011 at 7:45 AM, Jasmin Dizdarevic
<jasmin(dot)dizdarevic(at)gmail(dot)com> wrote:
> Hi,
> found the problem.
> 238 sec. with set enable_material = 'on'
> 4(!) sec. with set enable_material = 'off'
>
> @Robert Haas: I thought it would be interesting to you, because
> you've committed a patch regarding materialization for 9.0. If you like to
> investigate this further, I can provide you more details.
Well, it makes me glad I insisted we add enable_material.
But I can't really tell from this output what is happening. Can we
see the EXPLAIN ANALYZE output on 9.0, with and without
enable_material?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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