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Critical Resources
Resources such as CPU, memory, I/O capacity, and network bandwidth are key to
reducing service time. Adding resources increases throughput and reduces response
time. Performance depends on these factors:
Figure 1–3 shows that as the number of units requested rises, the time to service
completion rises.
Figure 1–3
To manage this situation, you have two options:
How many resources are available?
How many clients need the resource?
How long must they wait for the resource?
How long do they hold the resource?
Time to service completion vs. demand rate
Limit demand rate to maintain acceptable response times
Add resources
What is Performance Tuning?
Performance Overview 1-5
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