Methodology - Expert Oracle RAC Performance Diagnostics and Tuning - page 14

Figure 1-3. OUM IT life cycle management phases 2
The definition and discussions of the various phases of all stages of an IT life cycle management is beyond the
scope of this topic.
The two stages, Testing and Performance Management, are stages of the development life cycle that are very
crucial for the success of any project, including migrating from a single instance to a RAC configuration.
Testing and Performance Management
Testing and performance management go hand in hand with any product development or implementation. Whereas
testing also focuses on functional areas of the system, without testing performance-related issues cannot be
identified. The objective of both these areas is to ensure that the performance of the system or system components
meet the user's requirements and justifies migration from a single instance to a RAC environment.
As illustrated in Figure 1-3 , effective performance management must begin with identifying the key business
transactions and associated performance expectations and requirements early in the Inception and Elaboration
phases and implementing the appropriate standards, controls, monitoring checkpoints, testing, and metrics to ensure
2 Source: Oracle Corporation.