Return-Path: Delivered-To: 2-oracle-l@orafaq.com Received: (qmail 2637 invoked from network); 11 Dec 2007 13:32:16 -0600 Received: from freelists-180.iquest.net (HELO turing.freelists.org) (206.53.239.180) by static-ip-69-64-49-119.inaddr.intergenia.de with SMTP; 11 Dec 2007 13:32:16 -0600 Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id E92CB7D77EB; Tue, 11 Dec 2007 14:32:16 -0500 (EST) Received: from turing.freelists.org ([127.0.0.1]) by localhost (turing.freelists.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 24340-04; Tue, 11 Dec 2007 14:32:16 -0500 (EST) Received: from turing (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 665A77D7B27; Tue, 11 Dec 2007 14:32:16 -0500 (EST) Received: with ECARTIS (v1.0.0; list oracle-l); Tue, 11 Dec 2007 13:45:20 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 0E0CB7D5E72 for ; Tue, 11 Dec 2007 13:45:20 -0500 (EST) Received: from turing.freelists.org ([127.0.0.1]) by localhost (turing.freelists.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 14942-03 for ; Tue, 11 Dec 2007 13:45:19 -0500 (EST) Received: from smtp2.aina.net (smtp2.aina.net [81.16.64.175]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 7ABCD7D5737 for ; Tue, 11 Dec 2007 13:45:19 -0500 (EST) Received: from webmail.ainaratkaisu.fi (mail.ainaratkaisu.fi [81.16.64.150]) by smtp2.aina.net (Postfix) with ESMTP id 214F634669E; Tue, 11 Dec 2007 20:45:07 +0200 (EET) Received: from 62.142.244.186 (SquirrelMail authenticated user riku.rasanen@kantamestarit.fi) by webmail.ainaratkaisu.fi with HTTP; Tue, 11 Dec 2007 20:45:07 +0200 (EET) Message-ID: <1766.62.142.244.186.1197398707.squirrel@webmail.ainaratkaisu.fi> In-Reply-To: <04DDF147ED3A0D42B48A48A18D574C45099FFC22@NT15.oneneck.corp> References: <578806DDE66A3A45916740EB73C6982AB42BB5D391@M1EXCHANGE01.mmi.local> <04DDF147ED3A0D42B48A48A18D574C450999D439@NT15.oneneck.corp> <2509.62.142.244.186.1197317491.squirrel@webmail.ainaratkaisu.fi> <4ef2fbf50712101621r1c98c50ft1a542af3ec39d105@mail.gmail.com> <1509.62.142.244.186.1197395360.squirrel@webmail.ainaratkaisu.fi> <04DDF147ED3A0D42B48A48A18D574C45099FFC22@NT15.oneneck.corp> Date: Tue, 11 Dec 2007 20:45:07 +0200 (EET) Subject: RE: Operations that perform multiblock I/O and cluster factor From: Riku =?iso-8859-1?Q?R=E4s=E4nen?= To: "Allen, Brandon" Cc: oracle-l@freelists.org User-Agent: SquirrelMail/1.4.8 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 X-smtp2.aina.net-MailScanner-Information: Please contact the ISP for more information X-smtp2.aina.net-MailScanner: Found to be clean X-smtp2.aina.net-MailScanner-From: riku.rasanen@kantamestarit.fi X-Spam-Status: No X-archive-position: 3846 X-ecartis-version: Ecartis v1.0.0 Sender: oracle-l-bounce@freelists.org Errors-to: oracle-l-bounce@freelists.org X-original-sender: riku.rasanen@kantamestarit.fi Precedence: normal Reply-to: riku.rasanen@kantamestarit.fi List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: oracle-l X-List-ID: oracle-l List-subscribe: List-owner: List-post: List-archive: X-list: oracle-l X-Virus-Scanned: Debian amavisd-new at localhost.localdomain Ah, sorry, too tired. And it actually wasn't doing a range scan (not now nor in the past), it was doing a index full scan. STAT #6 id=1 cnt=1000000 pid=0 pos=1 obj=10627 op='TABLE ACCESS BY INDEX ROWID CLUSFAC_DEMO (cr=1001382 r=1000000 w=0 time=96322038 us)' STAT #6 id=2 cnt=1000000 pid=1 pos=1 obj=10629 op='INDEX FULL SCAN IDX_CLF_SCATTERED (cr=1382 r=0 w=0 time=5124467 us)' > My guess is that the p3=40 is due to the hiddden parameter setting _table_lookup_prefetch_size=40 The guess is correct. -- Riku Räsänen Kantamestarit OY www.kantamestarit.fi -- http://www.freelists.org/webpage/oracle-l