8-2-2 System evaluation indexes
System evaluation indexes require a comprehensive look at the computer
performance, reliability, and cost efficiency.
1
System performance
Chapter 8
System performance is measured by conducting a “performance testing”
as part of system testing and acceptance testing. A performance testing is a
test used to verify whether aspects of processing such as response time,
turnaround time, and benchmarks satisfy requirements.
The aspects used to evaluate the performance of a system are summarized
below.
(2)Turnaround time
The “turnaround time” is the time it takes to receive all processing results from the time the computer is requested to perform a series of tasks.
It is used to evaluate batch processing performance.
Computer system
(1)Response time
The “response time” is the time it takes for the computer to first respond
from the time the computer is requested to perform a given process. It is
used to evaluate the performance of online systems. Response time is affected by CPU performance and number of connected users. Lower loads
produce faster response times, while higher loads produce slower response
times.
Reference
Throughput
“Throughput” refers to the amount of
work that a system can perform in a unit
of time.
Response time
Printing
instruction
Processing
Printing result
Turnaround time
(3)Benchmark
A “benchmark” is an index used to measure system performance.
It compares and evaluates the performance of multiple computers by measuring aspects such as response time and CPU availability.
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