The The N-Monitor (nmon) Utility gives you a huge amount of information all on one screen. Even though IBM doesn't officially support the tool and you must use it at your own risk, you can get a wealth of performance statistics. Why use five or six tools when one free tool can give you everything you need?

The nmon tool can also capture the same data to a text file for later analysis and graphing for reports. The output is in a spreadsheet format (.csv)

With this application you can do the following:

  • Monitor system resources including memory, CPU, disk space, easily, from within one application.
  • Analyze usage over time.
Basic Usage

Basic Usage

The The N-Monitor (nmon) Utility program is a helpful tool in presenting all the important performance tuning information on one screen. The tool works on any dumb screen, telnet session, or even dial-up line. In addition, the tool is very efficient. It does not consume many CPU cycles, usually below 2%. On newer machines, CPU usage is well below 1%.

Data is displayed on the screen and updated once every two seconds using a dumb screen. However, you can easily change this interval to a longer or shorter time period. If you display the data on X-Windows via telnet and stretch the window, nmon can output a great of information all in one place.

(For a larger image, click on the following (click here))

You can access this application in the following way(s):

  • Computer ▸ More Applications ▸ Accessories section ▸ nmon .
  • From the command line: 'nmon &'

Usage Examples

Usage Examples

The interface can be bemusing for those used to more sophisticated GUI but with a little practice a very useful tool.

Try using the Keys to navigate and with the help and hint options a wealth of information can be had.

To view several things, just press the letter for them in succession (i.e. c d m ).

One way to quit is to use Cntrl + C key function.

Example, quickly press the keys 'm c n' to display memory, CPU, and network activity

Further Information

Further Reading and Information

For more information regarding The N-Monitor (nmon) Utility, please refer to the following internal/external website(s):



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