Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1VZ1GC-0005lq-6R for pgsql-admin@arkaria.postgresql.org; Wed, 23 Oct 2013 16:26:16 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1VZ1GB-0003h1-Iz for pgsql-admin@arkaria.postgresql.org; Wed, 23 Oct 2013 16:26:15 +0000 Received: from makus.postgresql.org ([2001:4800:7903:4::125]) by malur.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1VZ1G7-0003av-NL for pgsql-admin@postgresql.org; Wed, 23 Oct 2013 16:26:11 +0000 Received: from smtp-int-m.obspm.fr ([145.238.187.15]) by makus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1VZ1Fw-0004MQ-37 for pgsql-admin@postgresql.org; Wed, 23 Oct 2013 16:26:10 +0000 Received: from pcjas.obspm.fr (pcjas.obspm.fr [145.238.184.233]) by smtp-int-m.obspm.fr (8.14.3/8.14.3/SIO Observatoire de Paris - 07/2009) with ESMTP id r9NGPjLF004026 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 23 Oct 2013 18:25:47 +0200 Date: Wed, 23 Oct 2013 18:25:45 +0200 From: Albert Shih To: pgsql-admin@postgresql.org, freebsd-fs@freebsd.org, freebsd-jail@freebsd.org Subject: ZFS-FreeBSD + postgresql performance Message-ID: <20131023162545.GA19794@pcjas.obspm.fr> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit User-Agent: Mutt/1.5.21 (2010-09-15) X-Miltered: at smtp-int-m.obspm.fr with ID 5267F889.000 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-j-chkmail-Enveloppe: 5267F889.000/145.238.184.233/pcjas.obspm.fr/pcjas.obspm.fr/ X-Pg-Spam-Score: 0.4 (/) 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 Hi I would like to known if someone here have in production a FreeBSD server with postgresql and the FS for the data of postgresql is a ZFS pool. I'm going to buy some server with 96Go of Ram and a jbod of 12 disks (4To each) The purpose is to have everything on this zfs pool (except the system who still on classic raid). So to have many jail (~20-30) running apache/mysql/etc. one postgresql server with all data on the zfs. each jail use his own zfs partition. So I can use zfs send/received to have a mirror of everything in a other server. My question is about the performance, I known ZFS eat all memory he can have (or almost), so what append when we run database like postgresql and jail ? (it's also the reason of 96 Go ram). Sorry for cross-posting but it's about 3 differents things.... Regards. JAS -- Albert SHIH DIO bâtiment 15 Observatoire de Paris 5 Place Jules Janssen 92195 Meudon Cedex France Téléphone : +33 1 45 07 76 26/+33 6 86 69 95 71 xmpp: jas@obspm.fr Heure local/Local time: mer 23 oct 2013 18:17:24 CEST -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin