Return-Path: Received: from ensim.rackshack.net (root@localhost) by orafaq.net (8.11.6/8.11.6) with ESMTP id h8PLp8Y30410 for ; Thu, 25 Sep 2003 16:51:08 -0500 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 h8PLp7c30405 for ; Thu, 25 Sep 2003 16:51:07 -0500 Received: (from root@localhost) by www2.fatcity.com (8.11.6/8.11.6) id h8PJCJ519874 for oracle-l@orafaq.net; Thu, 25 Sep 2003 12:12:19 -0700 Received: by fatcity.com (05-Jun-2003/v1.0g-b73/bab) via fatcity.com id 005D1129; Thu, 25 Sep 2003 12:09:44 -0800 Message-ID: Date: Thu, 25 Sep 2003 12:09:44 -0800 To: Multiple recipients of list ORACLE-L X-Comment: Oracle RDBMS Community Forum X-Sender: Sender: ml-errors@fatcity.com Reply-To: ORACLE-L@fatcity.com Errors-To: ML-ERRORS@fatcity.com From: Subject: Re: guidance 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: 7bit Tanel , good you drew that smiley . I am so worried about this exam that for a minute there I was noting down what you wrote. Thanks for cheering me up though. Here is a question for you Which two statements about row migration are true? (Choose two) A. Row migration is caused by a PCTREE value set too low. B. Row migration can be resolved using the ANALYZE command. C. Row migration can be reduced by choosing a larger block size. D. Row migration means that row pieces are stored in different blocks. E. Queries that use an index to select migrated rows perform additional I/O. Answer: A, B Shouldn't it be a and e ? What does answer b mean when it says : "row migration can be RESOLVED" Whatever the meaning , analyze .. or analyze.. list chained rows would not be able to differentiate between chained or migrated rows, right ? And upon migration , the index will not be updated and will retain the old rowid right? so then e is correct . ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" Sent: Thursday, September 25, 2003 03:24 > Forget the modern tuning skills and when you're asked what shows the best > that your database works optimally; > > 1) Buffer cache hit ratio is 99% > 2) Buffer cache hit ratio is 99,999% > 3) Buffer cache hit ratio is 999999% > 4) Users aren't complaining > > Then answer 3 for sure ;) > > > Tanel. > > ----- Original Message ----- > To: "Multiple recipients of list ORACLE-L" > Sent: Thursday, September 25, 2003 12:04 AM > > > > List , I am planning to give my 9i performance tuning exam on the first