Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1YvTRf-00017L-Bi for pgsql-admin@arkaria.postgresql.org; Thu, 21 May 2015 16:35:43 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1YvTRd-0007Ni-SQ for pgsql-admin@arkaria.postgresql.org; Thu, 21 May 2015 16:35:41 +0000 Received: from makus.postgresql.org ([2001:4800:1501:1::229]) by malur.postgresql.org with esmtps (TLS1.2:RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1YvTQx-0006N2-2h for pgsql-admin@postgresql.org; Thu, 21 May 2015 16:34:59 +0000 Received: from mailout.easymail.ca ([64.68.201.169]) by makus.postgresql.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.84) (envelope-from ) id 1YvTQs-0000yX-04 for pgsql-admin@postgresql.org; Thu, 21 May 2015 16:34:56 +0000 Received: from localhost (localhost [127.0.0.1]) by mailout.easymail.ca (Postfix) with ESMTP id 78746E0E2; Thu, 21 May 2015 12:34:52 -0400 (EDT) X-Virus-Scanned: Debian amavisd-new at mailout.easymail.ca X-Spam-Flag: NO X-Spam-Score: -3.89 X-Spam-Level: X-Spam-Status: No, score=-3.89 required=5 tests=[ALL_TRUSTED=-1.8, AWL=-0.183, BAYES_00=-2.599, DNS_FROM_AHBL_RHSBL=0.692] Received: from mailout.easymail.ca ([127.0.0.1]) by localhost (easymail-mailout.easydns.vpn [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fo3HWtIBwJ1u; Thu, 21 May 2015 12:34:52 -0400 (EDT) Received: from [192.168.2.16] (unknown [8.39.228.5]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mailout.easymail.ca (Postfix) with ESMTPSA id E0917E0A8; Thu, 21 May 2015 12:34:51 -0400 (EDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) Subject: Re: Read performance on Large Table From: Scott Ribe In-Reply-To: Date: Thu, 21 May 2015 10:34:49 -0600 Cc: Scott Marlowe , "pgsql-admin@postgresql.org" Content-Transfer-Encoding: quoted-printable Message-Id: References: <580E17C5-363E-4D24-B381-80A1F4C83C81@elevated-dev.com> <1295589F-361A-4C3E-BA25-3A4F34C3CAB2@elevated-dev.com> To: Keith X-Mailer: Apple Mail (2.2098) X-Pg-Spam-Score: -2.6 (--) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-admin Precedence: bulk Sender: pgsql-admin-owner@postgresql.org On May 21, 2015, at 10:25 AM, Keith wrote: >=20 > The problem with creating partitions on the fly via triggers, even ahead = of when they're needed, is you run into BIG contention issues when you have= high insert rates. One session will see it needs to create a new table, th= e next one comes in before the table is made but either gets put into a wai= t state or outright fails when it goes to try and make the new table that's= already there=E2=80=A6 No failure, I handle the exception. > It may not be an issue for you, but it's definitely something to keep in = mind if you notice performance issues. :)=20 >=20 Right. Around midnight this db has very low activity. --=20 Scott Ribe scott_ribe@elevated-dev.com http://www.elevated-dev.com/ https://www.linkedin.com/in/scottribe/ (303) 722-0567 voice --=20 Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin