2.2 How to monitor performance

This section describes how to monitor performance.

Performance Management monitors the system operation status using baseline values as threshold values. The baseline is the performance data values that are assumed to be free of problems for system operation. Before you start monitoring performance, you must select a baseline on the basis of measurement results.

You should select an appropriate baseline by measuring system performance as follows:

• Measure system performance when the system is operating at peak status.

  We recommend that you select the baseline by measuring system performance when there are heavy loads in the operating environment.

• When you change system resources or the operating environment, measure the baseline again.

  The baseline might be affected significantly by the system configuration. When you change the system configuration, you should measure the baseline again.

The subsections below present examples of monitoring the performance of the following system resources:

• Processor

• Memory

• Disk

• Network

Organization of this section

• 2.2.1 Example of monitoring a processor

• 2.2.2 Example of monitoring memory

• 2.2.3 Example of monitoring the disk

• 2.2.4 Example of monitoring the network

• 2.2.5 Example of monitoring processes and services

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