3.4. Identifying Bottlenecks
With all these factors in mind, the goal of data interpretation and analysis is to determine if there is a particular bottleneck. Once a particular bottleneck is identified, tuning to improve performance can be initiated. Characteristics of bottlenecks are:
A particular resource is saturated.
The queue for the resource grows over time.
Other resources may be starved as a result.
Response time is not satisfactory.
3.4.1. Resource Saturation
Resource saturation is often thought of as 100% utilization. The entire resource is consumed. Additional requests for the resource are required to wait. However, this is not sufficient as proof of a bottleneck. Two examples reinforce this point.
Disk utilization is determined by periodically ...
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