This soft copy for use by IBM employees only.

Chapter 7. Performance Monitor Overview

Performance Monitor is one of the most valuable tools that NT has to offer. It can measure a wide variety of system components, and can be extended by other compliant applications, such as Microsofts SQL Server.

This chapter covers some of the built-in functions that NT provides in

Performance Monitor, including the following:

Logs critical system values

Sends alerts when important events occur in the network Provides a view of resource usage

The last task, measuring resource usage, is the most important and often least understood aspects of Performance Monitor. We will cover this topic in detail in Chapter 8, ªMonitoring and Performance Tuningº on page131.

7.1 Starting Performance Monitor

You can activate Performance Monitor by clicking on Start Programs Administrative Tools Performance Monitor, or by typing PERFMON on the command line. In either case, you will see the window shown in Figure 92.

Figure 92. Windows NT Performance Monitor

Note

No disk activity will be monitored by Performance Monitor unless you first issue DISKPERF -Yon the command line and reboot the server.

By enabling the disk monitoring you are placing additional loads on the processor. We recommend that you disable this feature once you have completed your tests. This can be done by executing DISKPERF -Nfrom the command line.

Copyright IBM Corp. 1997

119

Page 129
Image 129
IBM SG24-4763-00 manual Performance Monitor Overview, Starting Performance Monitor