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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, 14 Jan 2016 12:10:15 -0500
Message-ID: <5943.1452791415@sss.pgh.pa.us> (raw)
In-Reply-To: <CA+TgmoanS+7wpYZeX1C5Vp1XL56XK7f3mx1T+94QDN0_a+y3Jw@mail.gmail.com>
References: <19322.1451067023@sss.pgh.pa.us>
	<CEAB3A3D-FD33-4AB9-BDD3-FC0E20776245@anarazel.de>
	<19834.1451068135@sss.pgh.pa.us>
	<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>
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Robert Haas <robertmhaas@gmail.com> writes:
> On Thu, Jan 14, 2016 at 12:06 PM, Andres Freund <andres@anarazel.de> wrote:
>> Do we want to provide a backward compatible API for all this? I'm fine
>> either way.

> How would that work?

I see no great need to be backwards-compatible on this, especially if it
would complicate matters at all.  I doubt there's a lot of third-party
code using WaitLatch right now.  Just make sure there's an obvious
compile failure for anyone who is.

			regards, tom lane


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