Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1aTvNb-0000OY-75 for pgsql-hackers@arkaria.postgresql.org; Thu, 11 Feb 2016 17:50:11 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.84) (envelope-from ) id 1aTvNa-0000FH-QC for pgsql-hackers@arkaria.postgresql.org; Thu, 11 Feb 2016 17:50:10 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.84) (envelope-from ) id 1aTvMG-0006xf-O3 for pgsql-hackers@postgresql.org; Thu, 11 Feb 2016 17:48:48 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by magus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.84) (envelope-from ) id 1aTvME-0003WU-3q for pgsql-hackers@postgresql.org; Thu, 11 Feb 2016 17:48:48 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.4/8.14.4) with ESMTP id u1BHmdOr021928; Thu, 11 Feb 2016 12:48:39 -0500 From: Tom Lane To: Robert Haas cc: Andres Freund , =?UTF-8?B?0JLQsNGB0LjQu9GM0LXQsiDQlNC80LjRgtGA0LjQuQ==?= , "pgsql-hackers@postgresql.org" Subject: Re: Performance degradation in commit ac1d794 In-reply-to: References: <20151225211326.z4umuafvv27nczya@alap3.anarazel.de> <24833.1451078993@sss.pgh.pa.us> <20151226112248.uv3qxmroe4va7wke@alap3.anarazel.de> <20160114143931.GG10941@awork2.anarazel.de> <20160114155617.GI10941@awork2.anarazel.de> <20160114170604.GJ10941@awork2.anarazel.de> <20160114171421.GK10941@awork2.anarazel.de> <20160114172216.GL10941@awork2.anarazel.de> <8031.1452792493@sss.pgh.pa.us> Comments: In-reply-to Robert Haas message dated "Thu, 11 Feb 2016 12:18:30 -0500" Date: Thu, 11 Feb 2016 12:48:39 -0500 Message-ID: <21927.1455212919@sss.pgh.pa.us> X-Pg-Spam-Score: -2.1 (--) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-hackers Precedence: bulk Sender: pgsql-hackers-owner@postgresql.org Robert Haas 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 -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers