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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Васильев Дмитрий <d.vasilyev@postgrespro.ru>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: Performance degradation in commit ac1d794
Date: Thu, 11 Feb 2016 12:48:39 -0500
Message-ID: <21927.1455212919@sss.pgh.pa.us> (raw)
In-Reply-To: <CA+Tgmobft858D8YHOMAUDY31d5Li1wt6p0-MvYeTVwo0UkoBqA@mail.gmail.com>
References: <20151225211326.z4umuafvv27nczya@alap3.anarazel.de>
	<24833.1451078993@sss.pgh.pa.us>
	<20151226112248.uv3qxmroe4va7wke@alap3.anarazel.de>
	<20160114143931.GG10941@awork2.anarazel.de>
	<CA+Tgmoaay7n0HbqH4BS+XhdOOYhvYJ7DqZGrMXvduZM8UUXedQ@mail.gmail.com>
	<20160114155617.GI10941@awork2.anarazel.de>
	<CA+TgmoZ_2EgBCXinHsJn=v8bfg3Y3uXpG1xHiQ8g7yRJzwt3Yg@mail.gmail.com>
	<20160114170604.GJ10941@awork2.anarazel.de>
	<CA+TgmoanS+7wpYZeX1C5Vp1XL56XK7f3mx1T+94QDN0_a+y3Jw@mail.gmail.com>
	<20160114171421.GK10941@awork2.anarazel.de>
	<20160114172216.GL10941@awork2.anarazel.de>
	<8031.1452792493@sss.pgh.pa.us>
	<CA+Tgmobft858D8YHOMAUDY31d5Li1wt6p0-MvYeTVwo0UkoBqA@mail.gmail.com>
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Robert Haas <robertmhaas@gmail.com> writes:
> I think we should either get this fixed RSN or revert the problematic
> commit until we get it fixed.  I'd be rather disappointed about the
> latter because I think this was a very good thing on the merits, but
> probably not good enough to justify taking the performance hit over
> the long term.

Since it's only in HEAD, I'm not seeing the urgency of reverting it.
However, it'd be a good idea to put this on the 9.6 open items list
(have we got such a page yet?) to make sure it gets addressed before
beta.

			regards, tom lane


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