nmon

Nmon

nmon is a free system monitor tool for the AIX and Linux operating systems. It is used to monitor system performance and resource utilization in real time.
nmon image
monitoring performance resource-utilization

nmon: Real-Time System Monitor for AIX and Linuxs

Free system monitor tool to track performance and resource utilization in real-time on AIX and Linux operating systems.

What is Nmon?

nmon is a powerful and popular system monitor tool developed by IBM specifically for the AIX and Linux operating systems. It is used to monitor CPU, memory, network, disks, file systems and other system performance parameters in real time.

Some key features of nmon include:

  • Monitors CPU, memory, disks, network, file systems, NFS and top processes
  • Captures data at preset intervals and produces output in CSV format for analysis or graphing
  • Provides both an interactive interface for real-time monitoring as well as data collection mode
  • Uses negligible system resources, making it suitable for production systems
  • Free and open-source tool available for download

nmon is widely used by system administrators, developers and performance analysts for purposes like capacity planning, benchmarking, optimizing system configurations, identifying performance bottlenecks and troubleshooting issues. It complements monitoring tools like Ganglia by providing deep dive visibility into various subsystems.

Nmon Features

Features

  1. Monitors CPU usage
  2. Monitors memory usage
  3. Monitors network I/O
  4. Monitors disk I/O
  5. Generates reports and graphs

Pricing

  • Open Source

Pros

Free and open source

Lightweight and low overhead

Easy to use

Works on multiple platforms

Cons

Limited built-in graphing capabilities

No web interface

Steep learning curve


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