10-23-2007
SAR output
Shaan,
There's a cron job which runs every 5 minutes which records system statistics. This is the default output of SAR if no time options are specified at the command line.
The output is reporting on the percentage your system has spent running processes within each state. The first column represents processes run by users, whilst the second reports on system (or kernel) processes. I/O is the next column, which are processes that transfer data (most commonly read/write to disks) whilst the last column is reporting system idle.
MAN pages will provide more detailed explanations, but the above should give you a basic understanding of what SAR reports on by default.
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ISAG(1) System Activity Grapher ISAG(1)
NAME
isag - Interactive System Activity Grapher
SYNOPSIS
isag [-p datafiles_path] [-c config_file] [-ght gr_height] [-gwd gr_width]
DESCRIPTION
The isag command graphically displays the system activity data stored in a binary data file by a previous sar run. The isag command invokes
sar to extract the data to be plotted.
The data are processed using sar command and slightly transformed to tabular format, and then this format is visualized using gnuplot pro-
gram.
OPTIONS
-p datafiles_path
Specify the pathname where are located the daily data files. Default path is: /var/log/sysstat
-c config_file
Specify the configuration file used by the isag command. The contents of this file may depend on isag version number. Default config
file is: $HOME/.isag.cfg.
-ght gr_height
Specify the height of the chart area. Default value is: 400.
-gwd gr_width
Specify the width of the chart area. Default value is: 720.
CONFIG FILE
As mentioned above there is a config file. There are stored following values:
last showed graph
y limits for each kind of graph
It seems useful, because new run doesn't need new settings to obtain same scale.
PREREQUSITIES
Here is list of prerequsities including versioning and built-in features.
Tcl/Tk Version 8.0 or newer.
gnuplot
Gnuplot must have a tkcanvas display.
AUTHOR
D. Doubrava 2000, 2002 e-mail: linux_monitor(at)volny(dot)cz
HTTP Site: http://www.volny.cz/linux_monitor/isag/index.html
SEE ALSO
sar (1), sadc (8).
3rd Berkeley Distribution 0.81.0 ISAG(1)