| #!/bin/bash |
| |
| ############################################################################ |
| # |
| # Script for monitoring system-wide memory usage. |
| # |
| # Copyright (C) 2009 Bart Van Assche <bvanassche@acm.org>. |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU General Public License |
| # as published by the Free Software Foundation, version 2 |
| # of the License. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| ############################################################################ |
| |
| ######################### |
| # Function definitions # |
| ######################### |
| |
| function usage { |
| echo "Usage: $0 [-h] [-i <interval>]" |
| echo " -h - display this information." |
| echo " -i - monitoring interval in seconds." |
| } |
| |
| |
| ######################### |
| # Default settings # |
| ######################### |
| |
| interval=10 |
| |
| |
| ######################### |
| # Argument processing # |
| ######################### |
| |
| set -- $(/usr/bin/getopt "hi:" "$@") |
| while [ "$1" != "${1#-}" ] |
| do |
| case "$1" in |
| '-i') interval="$2"; shift; shift;; |
| '--') shift;; |
| *) usage; exit 1;; |
| esac |
| done |
| |
| if [ "$#" != 0 ] || [ "${interval}" -le 0 ]; then |
| usage |
| exit 1 |
| fi |
| |
| |
| #################### |
| # Performance test # |
| #################### |
| |
| printf "%-10s " "Time" |
| cat /proc/meminfo | |
| while read -r label number unit |
| do |
| printf " %10s" "${label%:}" |
| done |
| echo |
| |
| while true |
| do |
| printf "%-10d" "$(date +%s)" |
| cat /proc/meminfo | |
| while read -r label number unit |
| do |
| printf " %10d" "${number}" |
| done |
| echo |
| sleep "${interval}" |
| done |