1. Architecture & System Performance

2. Performance NOT always critical to a project Hard to manage
Really hard to fix after the fact!
The architect is the first person to impact performance!

3. You cannot control what you cannot measure!

4. Topics
Measurement
Tools
Managing a Design for performance

5. Measuring Performance
State your goals
Clear
Quantifiable
Define the system
Boundary is VERY important

6. Services and Outcomes Services are the activities of the system
May be use case related
Outcomes are results of a service executions
Positive
Negative

7. Select Metrics Need to match the goals Generally: Speed Accuracy
Throughput
Response time
Accuracy
Availibility

8. List parameters
System
Hardware
Software
Workload
Typical
Maximum

9. Select Factors to Study Evaluation Techniques
Not all params can be modified
Evaluation Techniques
Analytical modeling
Simulation
Real system measurement

10. Select workload Design experiments Analyze the data System workload
Operations / services
Background
Other systems on same processor
Processor load due to OS
Design experiments
Maximize the data gained by careful design
Analyze the data