This free tool 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 is designed for AIX and Linux performance specialists to use for monitoring and analyzing performance data, including:
- 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 -- AIX only
- Network File System (NFS)
- Dynamic LPAR (DLPAR) changes -- only pSeries p5 and OpenPower for either AIX or Linux
How to capture the data to a file for later analysis and graphing
See nmon -h for the details
Collecting data with nmon
nmon -f -s 30 -c 120
nmon -fT -s 30 -c 120
For Linux
For AIX
Graphical interface analysis (NMON ANALYZER)
You can download nmon analyzer jar file http://sourceforge.net/projects/jnmonanalyser/
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