Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1aTwBG-0003Mh-2Y for pgsql-hackers@arkaria.postgresql.org; Thu, 11 Feb 2016 18:41:30 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.84) (envelope-from ) id 1aTwBF-0004zZ-L2 for pgsql-hackers@arkaria.postgresql.org; Thu, 11 Feb 2016 18:41:29 +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 1aTwBF-0004zH-1I for pgsql-hackers@postgresql.org; Thu, 11 Feb 2016 18:41:29 +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 1aTwBC-0004i6-DN for pgsql-hackers@postgresql.org; Thu, 11 Feb 2016 18:41:28 +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 u1BIfKId023666; Thu, 11 Feb 2016 13:41:20 -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: <20160114170604.GJ10941@awork2.anarazel.de> <20160114171421.GK10941@awork2.anarazel.de> <20160114172216.GL10941@awork2.anarazel.de> <8031.1452792493@sss.pgh.pa.us> <21927.1455212919@sss.pgh.pa.us> <20160211175308.6er3o2oonzgxfvwp@alap3.anarazel.de> <20160211181924.eacehhcpjn7s3xhc@alap3.anarazel.de> Comments: In-reply-to Robert Haas message dated "Thu, 11 Feb 2016 13:29:02 -0500" Date: Thu, 11 Feb 2016 13:41:20 -0500 Message-ID: <23665.1455216080@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: > On Thu, Feb 11, 2016 at 1:19 PM, Andres Freund wrote: >> Well, I can't do anything about that right now. I won't have the time to >> whip up the new/more complex API we discussed upthread in the next few >> days. So either we go with a simpler API (e.g. pretty much a cleaned up >> version of my earlier patch), revert the postmaster deatch check, or >> somebody else has to take lead in renovating, or we wait... > Well, I thought we could just revert the patch until you had time to > deal with it, and then put it back in. That seemed like a simple and > practical option from here, and I don't think I quite understand why > you and Tom don't like it. Don't particularly want the git history churn, if we expect that the patch will ship as-committed in 9.6. If it becomes clear that the performance fix is unlikely to happen, we can revert then. If the performance change were an issue for a lot of testing, I'd agree with a temporary revert, but I concur with Andres that it's not blocking much. Anybody who does have an issue there can revert locally, no? 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