public inbox for [email protected]  

help / color / mirror / Atom feed

From: legrand legrand <[email protected]>
To: [email protected]
Subject: Re: OLAP/reporting queries fall into nested loops over seq scans or other horrible planner choices
Date: Fri, 3 Nov 2017 07:55:45 -0700 (MST)
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>
	<CAMjNa7dy23vwG4UEoTe+xcgJF6xj7bptVra_-BgieGTpJUYOSg@mail.gmail.com>
	<[email protected]>
List-Unsubscribe:  <mailto:[email protected]?body=unsub%20pgsql-performance>

To limit NL usage, wouldn't a modified set of Planner Cost Constants 
https://www.postgresql.org/docs/current/static/runtime-config-query.html
<https://www.postgresql.org/docs/current/static/runtime-config-query.html;  

seq_page_cost 
random_page_cost 
cpu_tuple_cost 
cpu_index_tuple_cost 
cpu_operator_cost 

be more hash join freindly (as Oracle' optimizer_index_cost_adj )?



--
Sent from: http://www.postgresql-archive.org/PostgreSQL-performance-f2050081.html


-- 
Sent via pgsql-performance mailing list ([email protected])
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected]
  Subject: Re: OLAP/reporting queries fall into nested loops over seq scans or other horrible planner choices
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox