Activity 7.1: Calculating CPU Usage

You’re the network administrator for Blue Yonder Airlines. A new search functionality has been added to your company’s Web site, and you want to calculate the CPU usage for the Search operation. You’re testing the operation on a server that’s configured with three 400 MHz Pentium II processors.

Table 7.9 provides the parameters you should use when calculating Web usage.

Table 7.9 CPU Usage Information for Search Operation

Type of Information	Details
CPU utilization (percentage of available CPU at optimum page throughput)	92.47%
Page throughput (pages per second)	18.21
Number of times a page is used per operation (requests per operations)	2
User profile operations per second (frequency)	0.00139
Upper bound of CPU	786 MHz

1. Your first step is to determine the CPU cost per operation. In order to calculate this cost, you must first determine the CPU usage. How do you calculate the CPU usage for the Search operation?
2. Now that you’ve calculated the CPU usage, you can use that calculation to determine the cost of the operation. How do you calculate the CPU cost for the Search operation?
3. You can now use the cost per operation to figure out the cost per user. How do you calculate the CPU cost per operation per use?