Message-ID: <53AC3E8D.8040106@comcast.net>
Date: Thu, 26 Jun 2014 11:38:53 -0400
From: AJ Weber <aweber@comcast.net>
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To: Claudio Freire <klaussfreire@gmail.com>
CC: Shaun Thomas <sthomas@optionshouse.com>,
 "pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>
Subject: Re: how to improve perf of 131MM row table?
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I noticed this too.  I am trying to find where the actual SQL is 
generated, and I am seeing if this is an artifact of Hibernate.

Will test the same query without the quotes as you recommend.  (But I 
don't know where to fix that, if it is the actual issue, unfortunately.)

On 6/26/2014 11:35 AM, Claudio Freire wrote:
> On Thu, Jun 26, 2014 at 10:26 AM, AJ Weber <aweber@comcast.net> wrote:
>> OK, the sample query is attached (hopefully attachments are allowed) as
>> "query.sql".
>> The "master table" definition is attached as "table1.sql".
>> The "detail table" definition is attached as "table2.sql".
>> The EXPLAIN (ANALYZE, BUFFERS) output is here:
>> http://explain.depesz.com/s/vd5
>
> I think the problem is that you're sending strings in the ids, instead
> of integers.
>
> Remove the quotes, leave only the numbers. That will make pg able to
> infer that node.id = prop.node_id means it can also use an index on
> alf_node_properties.
>
> I think.
>
> Try.


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