16.The Quest for performance Flashcards
1
Q
How is a model of a system used?
A
To analyse BEHAVIOUR under different circumstances
2
Q
What is a performance model
A
An abstraction of reality that allows us to study the performance related characteristics of the system
3
Q
Are performance models supposed to answer what if questions or direct changes to the production environment?
A
The first
4
Q
What are the two key performance modelling approaches?
A
- Analytical (Maths)
- Simulation (Monte Carlo, Discrete Events)
5
Q
What is an example of the analytical approach to performance modelling?
A
Amdhals law
6
Q
Little’s law?
A
Avg_no_of_customers = arival_rate * service_time
7
Q
How do Monte Carlo methods go?
A
- Generate RANDOM input
- Simulate and CHECK RESULT
