Oracle Optimizer: Moving to and working with CBO
Amar Kumar Padhi, amar_padhi@hotmail.com
If
your application was developed in earlier releases of Oracle (v. 7 and earlier),
chances are that your database is running in Rule based optimizer. This article
will help you understand the Oracle Optimizer and various efficient ways of
moving to Cost based Optimizer. This is Part 1 of a five part series.
Part 1
What is Optimizer?
Why Optimize?
Available Optimizers
Why is RBO being removed?
Why move to CBO?
Part 2
Initialization parameters that affect CBO
Internal Oracle parameters that affect CBO
Part 3
Setup changes for migrating to CBO
Generating Statistics
DML Monitoring
Part 4
Hints
Stored outlines
Statistics for SYS schema
Part 5
New Privileges
How to analyze execution plans in CBO?
Oracle Applications 11i specific information for CBO
