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This chapter is from the book

This chapter is from the book

Linux Performance Tuning and Capacity PlanningLinux Performance Tuning and Capacity Planning

Learn More Buy

This chapter is from the book

This chapter is from the book

Linux Performance Tuning and Capacity PlanningLinux Performance Tuning and Capacity Planning

Learn More Buy

Interpreting Results and Other Notes

Before delving into how each tool works and what the returned information means, I have to throw out a disclaimer. Most performance-monitoring tools used in a somewhat random pattern can sometimes yield random results. It is quite common for documentation that comes with a tool to state that scripting with it might yield better long-term results.

To better understand this, think about real performance and perceived performance. Even the system administrator can be tricked into "freaking out" over a quick loss of performance. A prime example is with quick compiling programs. If you happen to run a monitoring tool around the same time that a programmer is running a compile, it might appear that the system is being taxed when, in fact, it is not under a sustained load. Most likely you already realize that systems will occasionally face a quick burst load that really does not harm the overall performance of the system. However, do all users or staff members realize this? Most likely they do not-remember, a little user education never hurts.

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Last Update: November 17, 2020