Comments on: Philosophy – 2 http://jonathanlewis.wordpress.com/2009/05/17/philosophy-2/ Just another Oracle weblog Mon, 20 May 2013 17:10:14 +0000 hourly 1 http://wordpress.com/ By: PdV http://jonathanlewis.wordpress.com/2009/05/17/philosophy-2/#comment-33046 Mon, 18 May 2009 22:01:06 +0000 http://jonathanlewis.wordpress.com/?p=1258#comment-33046 If it is about “where you put your data”, then IOTs and Clusters will help you keep related data in one place. Favour a good clustering factor, so to speak.

But do keep the Philosophy series simple, readable, understandable.
Things may not always be simple, but Simple Fundamentals are Best.

]]> By: Toine http://jonathanlewis.wordpress.com/2009/05/17/philosophy-2/#comment-33038 Mon, 18 May 2009 08:50:17 +0000 http://jonathanlewis.wordpress.com/?p=1258#comment-33038 (And with “analyzed our application” I do not mean gathering statistics ;-), I mean we really looked at the application’s SQL and the way tables were mostly accessed)

]]> By: Toine http://jonathanlewis.wordpress.com/2009/05/17/philosophy-2/#comment-33037 Mon, 18 May 2009 08:48:13 +0000 http://jonathanlewis.wordpress.com/?p=1258#comment-33037 This is a philosephy I really became to understand after reading your book and especially the chapter on the clustering factor as well as after attending a one day class of Tapio Lahdenmaki on index design. Never before I realized so much that the scattering of data in a table makes so much difference. Recently we made considerable improvements when we analyzed our (Siebel) OLTP application and online redefined a number of important tables, sorting them on the most used access ‘paths’. DBMS_REDEFINITION (one of my favorite built-in packages) makes that so easy and online and the benefit was visible immediately. I plan to write a post about that soon on my own blog…

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