From: Peter <pmc@citylink.dinoex.sub.org>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Laurenz Albe <laurenz.albe@cybertec.at>
Cc: pgsql-performance@lists.postgresql.org
Subject: Re: Should from_collapse be switched off? (queries 10 times faster)
Date: Fri, 23 Mar 2018 18:36:58 +0100
Message-ID: <20180323173658.GA58069@gate.oper.dinoex.org> (raw)
In-Reply-To: <18405.1521814459@sss.pgh.pa.us>
References: <20180323100308.GA1188@gate.oper.dinoex.org>
<1521805295.2471.40.camel@cybertec.at>
<18405.1521814459@sss.pgh.pa.us>
On Fri, Mar 23, 2018 at 10:14:19AM -0400, Tom Lane wrote:
! It's conceivable that the OP's problem is actually planning time
! (if the query joins sufficiently many tables) and that restricting
! the cost of the join plan search is really what he needs to do.
Negative. Plnning time 10 to 27 ms. Execution time 600 to 6300 ms.
! Lacking any further information about the problem, we can't say.
! We can, however, point to
! https://wiki.postgresql.org/wiki/Slow_Query_Questions
! concerning how to ask this type of question effectively.
I strongly hope the data that I sent as followup will now
suffice Your expectations.
rgds,
PMc
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To: pgsql-performance@postgresql.org
Cc: pmc@citylink.dinoex.sub.org, tgl@sss.pgh.pa.us, laurenz.albe@cybertec.at, pgsql-performance@lists.postgresql.org
Subject: Re: Should from_collapse be switched off? (queries 10 times faster)
In-Reply-To: <20180323173658.GA58069@gate.oper.dinoex.org>
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