From: Craig Ringer <craig@2ndquadrant.com>
To: jesper@krogh.cc, "pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>
Subject: Re: Slow query-plan generation (fast query) PG 9.2
Date: Tue, 03 Sep 2013 15:47:08 +0800
Message-ID: <522593FC.3010302@2ndquadrant.com> (raw)
In-Reply-To: <e9ed24069c06d8b504fbef3e28df52d7.squirrel@shrek.krogh.cc>
References: <e9ed24069c06d8b504fbef3e28df52d7.squirrel@shrek.krogh.cc>
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On 09/03/2013 03:46 PM, jesper@krogh.cc wrote:
> Hi.
>
> I have a strange situation where generating the query plan takes 6s+ and
> executing it takes very little time.
How do you determine that it's planning time at fault here?
Please take separate timing for:
PREPARE testq AS select table.id from db.table left
join db.tablepro on db.id = tablepro.table_id where table.fts @@
to_tsquery('english','q12345') ;
and then:
EXPLAIN ANALYZE EXECUTE testq;
--
Craig Ringer http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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To: pgsql-performance@postgresql.org
Cc: craig@2ndquadrant.com
Subject: Re: Slow query-plan generation (fast query) PG 9.2
In-Reply-To: <522593FC.3010302@2ndquadrant.com>
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