Training for Linux system administrators (also on-site):
Master class  "Linux Performance Analysis and Tuning" (5 days)
Understand kernel mechanisms that influence performance.
Interpret the output of tools like atop. Improve your system's performance!

News

September 30, 2017

Netatop version 2.0

March 25, 2017

Atop on GitHub

March 25, 2017

Atop version 2.3.0

March 25, 2017

Atop version 2.2.6

May 26, 2016

Netatop version 1.0

October 9, 2015

Netatop version 0.7

August 4, 2015

Netatop version 0.6

June 25, 2015

Atop version 2.2-3

January 18, 2015

Netatop version 0.5

November 25, 2014

Netatop version 0.4

September 6, 2014

Atop version 2.1

Atop is an ASCII full-screen performance monitor for Linux that is capable of reporting the activity of all processes (even if processes have finished during the interval), daily logging of system and process activity for long-term analysis, highlighting overloaded system resources by using colors, etc. At regular intervals, it shows system-level activity related to the CPU, memory, swap, disks (including LVM) and network layers, and for every process (and thread) it shows e.g. the CPU utilization, memory growth, disk utilization, priority, username, state, and exit code.
In combination with the optional kernel module netatop, it even shows network activity per process/thread.

The command atop has some major advantages compared to other performance monitoring tools: