Return-Path: Received: from ensim.rackshack.net (root@localhost) by orafaq.net (8.11.6/8.11.6) with ESMTP id hABGZi921784 for ; Tue, 11 Nov 2003 10:35:44 -0600 X-ClientAddr: 66.27.56.213 Received: from www2.fatcity.com (rrcs-west-66-27-56-213.biz.rr.com [66.27.56.213]) by ensim.rackshack.net (8.11.6/8.11.6) with ESMTP id hABGZic21779 for ; Tue, 11 Nov 2003 10:35:44 -0600 Received: (from root@localhost) by www2.fatcity.com (8.11.6/8.11.6) id hABDfl319881 for oracle-l@orafaq.net; Tue, 11 Nov 2003 05:41:47 -0800 Received: by fatcity.com (05-Jun-2003/v1.0g-b73/bab) via fatcity.com id 005D6542; Tue, 11 Nov 2003 05:44:29 -0800 Message-ID: Date: Tue, 11 Nov 2003 05:44:29 -0800 To: Multiple recipients of list ORACLE-L X-Comment: Oracle RDBMS Community Forum X-Sender: "Jamadagni, Rajendra" Sender: ml-errors@fatcity.com Reply-To: ORACLE-L@fatcity.com Errors-To: ML-ERRORS@fatcity.com From: "Jamadagni, Rajendra" Subject: RE: Monitor Index Usage Organization: Fat City Network Services, San Diego, California X-ListServer: v1.0g, build 73; ListGuru (c) 1996-2003 Bruce A. Bergman Precedence: bulk Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Richard ... thanks for this advise ... now I can add that to my list of "observations" ... Thanks Raj -------------------------------------------------------------------------------- Rajendra dot Jamadagni at nospamespn dot com All Views expressed in this email are strictly personal. QOTD: Any clod can have facts, having an opinion is an art ! -----Original Message----- Sent: Tuesday, November 11, 2003 8:20 AM To: Multiple recipients of list ORACLE-L Note that 9.2 has the nice family of v$segment_statistic views that can give you this level of information very easily. It has advantages over v$object_usage in that is gives you an indication on how often indexes are used, rather than that they've been used. Although sampling and other factors may impact their accuracy, those indexes that have a very high ratio of logical reads to db block changes you know are highly used for "legitimate" index accesses, those closer to a 2-1 ratio are only being accessed mainly due to dml changes. A bit of investigation and experimentation and these views can be very useful. Cheers Richard ************************************************************************************** This e-mail message is confidential, intended only for the named recipient(s) above and may contain information that is privileged, attorney work product or exempt from disclosure under applicable law. If you have received this message in error, or are not the named recipient(s), please immediately notify corporate MIS at (860) 766-2000 and delete this e-mail message from your computer, Thank you. **************************************************************************************4 -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Jamadagni, Rajendra INET: Rajendra.Jamadagni@espn.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru@fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).