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System Administration Guide: Advanced Administration
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System Performance and System Resources

The performance of a computer system depends upon how the system uses and allocates its resources. Monitor your system's performance regularly so that you know how it behaves under normal conditions. You should have a good idea of what to expect, and be able to recognize a problem when it occurs.

System resources that affect performance are described in the following table.

System Resource

Description

Central processing unit (CPU)

The CPU processes instructions by fetching instructions from memory and executing them.

Input/output (I/O) devices

I/O devices transfer information into and out of the computer. Such a device could be a terminal and keyboard, a disk drive, or a printer.

Memory

Physical (or main) memory is the amount of random access memory (RAM) on the system.

Chapter 13, Monitoring System Performance (Tasks) describes the tools that display statistics about the system's activity and performance.

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  Published under the terms fo the Public Documentation License Version 1.01. Design by Interspire