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Utilization

Utilization is simply the fraction of the capacity of a component that you are actually using. You might think that you want all your components at close to 100 percent utilization in order to get the most bang for your buck, but this is not necessarily how things work. Remember that for disk drives and Ethernet, latency suffers greatly at high utilization. A rule of thumb is many components can run at their best performance up to about 70 percent utilization. The perfmeter tool that comes with many versions of Unix is a good graphical way to monitor the utilization of your system.


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