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Contents
#!/usr/bin/env bash
#
# Evaluate percentage of heap usage on specfic Tomcat backed JVM from Linux based systems based on percentage
# This was forked from Sensu Community Plugins
# Date: 2013-9-30
# Modified: Mario Harvey - badmadrad.com
# You must have openjdk-7-jdk and openjdk-7-jre packages installed
# http://openjdk.java.net/install/
# Also make sure the user "sensu" can sudo without password
# #RED
while getopts 'w:c:n:hp' OPT; do
case $OPT in
w) WARN=$OPTARG;;
c) CRIT=$OPTARG;;
n) NAME=$OPTARG;;
h) hlp="yes";;
p) perform="yes";;
*) unknown="yes";;
esac
done
# usage
HELP="
usage: $0 [ -n value -w value -c value -p -h ]
-n --> Name of JVM process < value
-w --> Warning Percentage < value
-c --> Critical Percentage < value
-p --> print out performance data
-h --> print this help screen
"
if [ "$hlp" = "yes" ]; then
echo "$HELP"
exit 0
fi
WARN=${WARN:=0}
CRIT=${CRIT:=0}
NAME=${NAME:=0}
#Get PID of JVM.
#At this point grep for the name of the java process running your jvm.
PID=$(sudo jps | grep $NAME | awk '{ print $1}')
#Get heap capacity of JVM
TotalHeap=$(sudo jstat -gccapacity $PID | tail -n 1 | awk '{ print ($4 + $5 + $6 + $10) / 1024 }')
#Determine amount of used heap JVM is using
UsedHeap=$(sudo jstat -gc $PID | tail -n 1 | awk '{ print ($3 + $4 + $6 + $8 + $10) / 1024 }')
#Get heap usage percentage
HeapPer=$(echo "scale=3; $UsedHeap / $TotalHeap * 100" | bc -l| cut -d "." -f1)
if [ "$HeapPer" = "" ]; then
echo "MEM UNKNOWN -"
exit 3
fi
if [ "$perform" = "yes" ]; then
output="jvm heap usage: $HeapPer% | heap usage="$HeapPer"%;$WARN;$CRIT;0"
else
output="jvm heap usage: $HeapPer% | $UsedHeap MB out of $TotalHeap MB"
fi
if (( $HeapPer >= $CRIT )); then
echo "MEM CRITICAL - $output"
exit 2
elif (( $HeapPer >= $WARN )); then
echo "MEM WARNING - $output"
exit 1
else
echo "MEM OK - $output"
exit 0
fi
Version data entries
6 entries across 5 versions & 1 rubygems