nmon is a free console-based performance monitoring tool from IBM. It works on both AIX and RHEL.
If nmon is not already installed, you must first install it:
- How do I install nmon on Linux?
- How do I install nmon on AIX?
To use nmon:
View a step-by-step screencast of this process:
- Log into your server as root using a terminal emulator such as PuTTy (see also: How do I use PuTTy with my Eclipse server?)
- (AIX only) Set the terminal emulation type to match the PuTTy console:
- Press the appropriate keys to launch or close various monitoring windows. Type “h” for help. Here are some common views:
- “t”: display top processes
- “t” then”u”: display top processes by CPU utilization and show command line arguments
- “c”: display CPU utilization
- “l”: display longer-term CPU utilization averages
- “d”: display disk I/O graphs
- “h”: display help
- IBM DeveloperWorks Wiki: nmon for AIX Performance Monitoring
- IBM DeveloperWorks: nmon performance: A free tool to analyze AIX and Linux performance