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Tuning Oracle for Siebel – SQL template

The time has come to write down some of the most relevant discoveries I’ve made so far while being part of a team that is tuning a huge Siebel installation for a leading Italian company (“huge” especially because of the user base dimension and secondarily because of the hardware deployed, a three-node RAC on pretty powerful SMP machines).

This blog entry is about the structure of the Siebel queries and the effect of the settings of some CBO-related parameters – settings made by the Siebel clients by altering the session at connect time, or required as mandatory in the Siebel installation notes.…

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