This page describes additional documentation, links to related sites, examples of scripts, etcetera.

Documentation

• Case study with atop: memory leakage
  This article describes the analysis of a system suffering from a process with a memory leakage. It also describes a way to control such misbehaving process (i.e. avoid that the entire system suffers) for the time that the problem has not been solved in the applications' code.
  
  
• Manual pages
  Online manual pages of atop(1), atopsar(1) and atoprc(5).

Links

• FreeBSD port
  A FreeBSD port of atop/atopsar made by Alex Samorukov supporting all features and some additional FreeBSD-specific functionality.

Courses

• Linux performance analyse en tuning (Dutch)
  This course (four days) provides knowledge about the way that the Linux kernel handles the performance-critical hardware resources (CPU, memory, disk, network). With this information in mind, the counters of atop/atopsar are discussed.

Scripts

The tar archive atopscripts (version 1.1) contains scripts to be used to process output of atop/atopsar:

• findleak
  Script that displays an overview of the virtual memory growth per process during the last 14 days (the daily memory size of processes at 5:00 PM is taken). Processes that were only present for 1 day and processes that did not grow are ignored. The list shows per process the PID and process name, how many days the process has lived (max. 14 days), the total growth of the virtual memory consumption during that number of days, and the growth per day (in MiB).
  Notice that not every process that grows is a process suffering from a memory leak! Mainly processes that have a daily growth are suspects.
  
  Version 1.1 contains some bugfixes (explicit use of bash and proper use of awk sub()).
  Credits: Gerrit Smit