nmon is short for Nigel's Performance Monitor. It
is a systems administrator, tuner, benchmark tool.
It can display the CPU, memory, network, disks (mini graphs or
file systems, NFS, top processes, resources (Linux version &
on Power micro-partition information.
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
shorter time period.
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).
nmon for Linux was an internal project at IBM for many years and was
released to open source under GPL on 27th July 2009.
- CPU utilization
- Memory use
- Kernel statistics and run queue information
- Disks I/O rates, transfers, and read/write ratios
- Free space on file systems
- Disk adapters
- Network I/O rates, transfers, and read/write ratios
- Paging space and paging rates
- CPU and AIX specification
- Top processors
- IBM HTTP Web cache
- User-defined disk groups
- Machine details and resources
- Asynchronous I/O -- AIX only
- Workload Manager (WLM) -- AIX only
- IBM TotalStorage Enterprise Storage Server (ESS) disks --
- Network File System (NFS)
- Dynamic LPAR (DLPAR) changes
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Last Updated Sunday, August 17 2014 @ 08:22 AM EDT