Caution

This is the documentation for the current development branch of the CometVisu. It is possible that some of the described features are not yet available in the current release.

Also there might be lots of errors in this documentation as some parts of the content have been translated by an online translation service.

CPU load for Linux Systeme

The CPU load of a Linux system (1 min, 5 min, 15 min) can be filled with this script in a RRD database. (This must be taken into account in the visualization, the datasourceIndex must be set)

This script works if it is saved (and executable) under /var/www/rrd/cpuload

#!/bin/bash

cd /var/www/rrd

# create database if not exists
[ -f cpuload.rrd ] || {
/usr/bin/rrdtool create cpuload.rrd --step 300 \
DS:load1:GAUGE:1200:U:U \
DS:load5:GAUGE:1200:U:U \
DS:load15:GAUGE:1200:U:U \
RRA:AVERAGE:0.5:1:3200 \
RRA:AVERAGE:0.5:6:3200 \
RRA:AVERAGE:0.5:36:3200 \
RRA:AVERAGE:0.5:144:3200 \
RRA:AVERAGE:0.5:1008:3200 \
RRA:AVERAGE:0.5:4320:3200 \
RRA:AVERAGE:0.5:52560:3200 \
RRA:AVERAGE:0.5:525600:3200
}

LOAD=$(awk '{print $1":"$2":"$3}' < /proc/loadavg)
/usr/bin/rrdtool update cpuload.rrd N:$LOAD

The following line must be added in /etc/crontab to call the script every 5 minutes:

*/5 *   * * *   root    /var/www/rrd/cpuload