Received: from maia.hub.org (unknown [200.46.204.183]) by mail.postgresql.org (Postfix) with ESMTP id B17FC6338A8 for ; Mon, 22 Mar 2010 08:15:03 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 51225-10 for ; Mon, 22 Mar 2010 11:14:52 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail-vw0-f46.google.com (mail-vw0-f46.google.com [209.85.212.46]) by mail.postgresql.org (Postfix) with ESMTP id 4B47C633800 for ; Mon, 22 Mar 2010 08:14:53 -0300 (ADT) Received: by vws6 with SMTP id 6so327456vws.19 for ; Mon, 22 Mar 2010 04:14:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=TqUD6BgXbK3uTL4buAvFdyzPlP43oU0raWwJkFwiquE=; b=vtvWXnt0V7cr5BTH46FtWiKWV8xzX9INylpHVsvJXCFbDpMPqK0nh78nuA0svpfOEn OS9ZjJJ9fjJzVfl5MF8tro48UOx2Bs+97q14Roi53FvdbAsqBgkSL3MbgoWkDmlT9pkn 9x4Ai5BtLzHmka7rDm642LiVM+HklZ6B42dQM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=JTpuI+9mm2bHkH+xqzDwAsiU58tr4z0eGaXF7lj7cGxjU+v8O19GuiEdVfpPqkVxnp teCwrt6gfwCDfFlmpfTR5VD5L7Wy7Ph/87pgI1Q8cqmxp7xAlQZJkL3Wf36Ry2dijE6M VR7vTNq1HcTjkh2rx69bbvm+4xskg7433L33w= MIME-Version: 1.0 Received: by 10.220.124.71 with SMTP id t7mr1815140vcr.70.1269256491581; Mon, 22 Mar 2010 04:14:51 -0700 (PDT) In-Reply-To: References: <4BA23936.2030507@gmail.com> <4BA596D2.4050406@squeakycode.net> Date: Mon, 22 Mar 2010 07:14:51 -0400 Message-ID: Subject: Re: mysql to postgresql, performance questions From: Merlin Moncure To: Dave Crooke Cc: pgsql-performance@postgresql.org, Corin , Andy Colson Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-2.599 tagged_above=-10 required=5 tests=BAYES_00=-2.599 X-Spam-Level: X-Archive-Number: 201003/267 X-Sequence-Number: 38092 On Sun, Mar 21, 2010 at 9:14 PM, Dave Crooke wrote: > Note however that Oracle offeres full transactionality and does in place row > updates. There is more than one way to do it. There's no free lunch. If you do mvcc you have to maintain multiple versions of the same row. merlin