Received: from maia.hub.org (maia-3.hub.org [200.46.204.243]) by mail.postgresql.org (Postfix) with ESMTP id 35E92B5DBC1 for ; Fri, 19 Aug 2011 12:03:07 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.243]) (amavisd-maia, port 10024) with ESMTP id 54631-01 for ; Fri, 19 Aug 2011 15:03:00 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from marajade.localdomain (97-64-237-59.client.mchsi.com [97.64.237.59]) by mail.postgresql.org (Postfix) with ESMTP id ABB0DB5DBE5 for ; Fri, 19 Aug 2011 12:03:00 -0300 (ADT) Received: from [192.168.10.84] (unknown [192.168.10.84]) (Authenticated sender: andy) by marajade.localdomain (Postfix) with ESMTPA id C4DF146903; Fri, 19 Aug 2011 10:02:59 -0500 (CDT) Message-ID: <4E4E7B2E.1040209@squeakycode.net> Date: Fri, 19 Aug 2011 10:03:10 -0500 From: Andy Colson User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20110812 Thunderbird/6.0 MIME-Version: 1.0 To: Krzysztof Chodak CC: pgsql-performance@postgresql.org Subject: Re: Variable versus constrant size tuples References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-0.918 tagged_above=-10 required=5 tests=BAYES_00=-1.9, RDNS_DYNAMIC=0.982 X-Spam-Level: X-Archive-Number: 201108/233 X-Sequence-Number: 44680 On 8/19/2011 4:03 AM, Krzysztof Chodak wrote: > Is there any performance benefit of using constant size tuples? > If you are referring to varchar(80) vs text, then no, there is no benefit. -Andy