Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1XCdP7-0008Bf-52 for pgsql-performance@arkaria.postgresql.org; Wed, 30 Jul 2014 23:35:29 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1XCdP6-0005CC-Ir for pgsql-performance@arkaria.postgresql.org; Wed, 30 Jul 2014 23:35:28 +0000 Received: from makus.postgresql.org ([2001:4800:1501:1::229]) by malur.postgresql.org with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1XCdP5-00057i-0Z for pgsql-performance@postgresql.org; Wed, 30 Jul 2014 23:35:27 +0000 Received: from [2404:130:0:10::40:2] (helo=mail.catalyst.net.nz) by makus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1XCdP0-0007Pi-Nv for pgsql-performance@postgresql.org; Wed, 30 Jul 2014 23:35:24 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.catalyst.net.nz (Postfix) with ESMTP id C80B932D09; Thu, 31 Jul 2014 11:35:18 +1200 (NZST) X-Virus-Scanned: Debian amavisd-new at catalyst.net.nz Received: from mail.catalyst.net.nz ([127.0.0.1]) by localhost (bertrand.catalyst.net.nz [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Q+QEyiP-wDzk; Thu, 31 Jul 2014 11:35:17 +1200 (NZST) Received: from [IPv6:2404:130:0:1000:649d:306d:ea5f:aa01] (unknown [IPv6:2404:130:0:1000:649d:306d:ea5f:aa01]) (Authenticated sender: mark.kirkwood) by mail.catalyst.net.nz (Postfix) with ESMTPSA id 5C89E32F22; Thu, 31 Jul 2014 11:33:26 +1200 (NZST) Message-ID: <53D981EC.40504@catalyst.net.nz> Date: Thu, 31 Jul 2014 11:38:20 +1200 From: Mark Kirkwood User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0 MIME-Version: 1.0 To: Tomas Vondra , Tom Lane CC: Andres Freund , pgsql-performance@postgresql.org Subject: Re: 60 core performance with 9.3 References: <53ACB190.2030206@catalyst.net.nz> <53ACD6C4.9050605@catalyst.net.nz> <20140627091951.GA16680@awork2.anarazel.de> <53B283F3.7020005@catalyst.net.nz> <20140701101307.GO21422@awork2.anarazel.de> <53BF326F.2070903@catalyst.net.nz> <20140711082207.GI17261@awork2.anarazel.de> <53C711B6.5040802@catalyst.net.nz> <53D84E16.90609@catalyst.net.nz> <3e6b532b0115ffff08e8d0debd76695b.squirrel@sq.gransy.com> <26683.1406723992@sss.pgh.pa.us> <11b808bce5fce4547fdcac5e94acb440.squirrel@sq.gransy.com> In-Reply-To: <11b808bce5fce4547fdcac5e94acb440.squirrel@sq.gransy.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2404:130:0:10::40:2 (failed) X-Pg-Spam-Score: 0.3 (/) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-performance Precedence: bulk Sender: pgsql-performance-owner@postgresql.org On 31/07/14 00:47, Tomas Vondra wrote: > On 30 Červenec 2014, 14:39, Tom Lane wrote: >> "Tomas Vondra" writes: >>> On 30 ??ervenec 2014, 3:44, Mark Kirkwood wrote: >>>> While these numbers look great in the middle range (12-96 clients), >>>> then >>>> benefit looks to be tailing off as client numbers increase. Also >>>> running >>>> with no stats (and hence no auto vacuum or analyze) is way too scary! >> >>> By disabling statistics collector you loose runtime counters - number of >>> sequential/index scans on a table, tuples read from a relation aetc. But >>> it does not influence VACUUM or planning at all. >> >> It does break autovacuum. > > Of course, you're right. It throws away info about how much data was > modified and when the table was last (auto)vacuumed. > > This is a clear proof that I really need to drink at least one cup of > coffee in the morning before doing anything in the morning. > Lol - thanks for taking a look anyway. Yes, coffee is often an important part of the exercise. Regards Mark -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance