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From: androxkentaki . <androxkentaki@gmail.com>
To: liam saffioti <liam.saffiotti@gmail.com>
To: Mladen Gogala <gogala.mladen@gmail.com>
Cc: pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Re: AW: postgresql long running query
Date: Wed, 8 Dec 2021 18:57:22 +0000
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Can you tell us how do you run query at night?
IS it via Odbc? Or direct by pgsql script in cron?

Pozdrawiam
Andrzej Gerasimuk
________________________________
From: liam saffioti <liam.saffiotti@gmail.com>
Sent: Wednesday, December 8, 2021 4:19:33 PM
To: Mladen Gogala <gogala.mladen@gmail.com>
Cc: pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Re: AW: postgresql long running query

Hi everyone,

Thank you for your help. But my query is not always slow. It works fast under normal conditions, but in a way that I don't understand it works very slow at some times.
I think there may be a different reason why a query that takes 800ms, in general, takes 18 minutes at a time.

Thanks a lot
Liam

Mladen Gogala <gogala.mladen@gmail.com<mailto:gogala.mladen@gmail.com>>, 8 Ara 2021 Çar, 17:11 tarihinde ºunu yazd¹:
On 12/8/21 06:13, Dischner, Anton wrote:



Do optimizer hints in PG exists?



Obviously not: https://wiki.postgresql.org/wiki/OptimizerHintsDiscussion

Yes, they do exist: http://pghintplan.osdn.jp/pg_hint_plan.html

Packages can be downloaded here: https://osdn.net/projects/pghintplan/releases/73862

There is no package for version 14, you will have to build it from the source:

https://github.com/ossc-db/pg_hint_plan

--
Mladen Gogala
Database Consultant
Tel: (347) 321-1217
https://dbwhisperer.wordpress.com

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