Received: from maia.hub.org (maia-2.hub.org [200.46.204.251]) by mail.postgresql.org (Postfix) with ESMTP id AD236133740B for ; Mon, 14 Feb 2011 08:06:34 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.251]) (amavisd-maia, port 10024) with ESMTP id 48997-06 for ; Mon, 14 Feb 2011 12:06:27 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from sam.nabble.com (sam.nabble.com [216.139.236.26]) by mail.postgresql.org (Postfix) with ESMTP id 608811336971 for ; Mon, 14 Feb 2011 08:06:27 -0400 (AST) Received: from [192.168.236.26] (helo=sam.nabble.com) by sam.nabble.com with esmtp (Exim 4.69) (envelope-from ) id 1PoxCF-00065q-4Y for pgsql-performance@postgresql.org; Mon, 14 Feb 2011 04:06:27 -0800 Date: Mon, 14 Feb 2011 04:06:27 -0800 (PST) From: dba To: pgsql-performance@postgresql.org Message-ID: <1297685187135-3384348.post@n5.nabble.com> Subject: Field wise checking the performance. MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-0.767 tagged_above=-10 required=5 tests=BAYES_00=-1.9, FREEMAIL_FROM=0.001, T_TO_NO_BRKTS_FREEMAIL=0.01, URI_HEX=1.122 X-Spam-Level: X-Archive-Number: 201102/382 X-Sequence-Number: 42520 I have two identical tables. But the with of the fields are different. Need to know whether changing from varchar(100) to varchar(30) will increase the performance, or its just the memory access. -- View this message in context: http://postgresql.1045698.n5.nabble.com/Field-wise-checking-the-performance-tp3384348p3384348.html Sent from the PostgreSQL - performance mailing list archive at Nabble.com.