check_jvm

#!/bin/bash
#
# Verifica qnt tempo cada Full Garbage Collector leva, e calcula a cada qnt tempo executa um!
# Felipe Ferreira Jan 2016
#
# Req. jps, jstat

#debug=1

PID=`su - eceowl -c 'jps | grep -iv jps|cut -d " " -f1'`
if [ -z "$PID" ]; then
	echo "UNKOWN - Nao foi possivel pegar o PID do processo java"
	exit 1
fi
#T=`jstat -gcutil $PID 100 1 `
T=`su - eceowl -c "jstat -gc -t $PID 1000  1"`

TEMPTOTAL=`echo $T |awk '{ print \$17 }' |tail -n 1 | awk -F '.' '{ print \$1}'`

FGC=`echo $T  |awk '{ print $(NF - 2) }' |tail -n 1`
FGCT=`echo $T  |awk '{ print $(NF - 1) }' |tail -n 1 |awk -F "." '{ print $1}'`

if [ $FGCT -ge 1 ] ; then
# pega a media de tempo, FGCT (total acumulado) / FGC(quantas vezes o GC rodou)
	TEMPOGC=`echo $FGCT / $FGC | bc`
        TEMPOGC=`echo "scale=3; $FGCT / $FGC" | bc -l`
else
	TEMPOGC=0
fi

CADATGC=`expr $TEMPTOTAL / $FGC`
WARN=$1
CRIT=$2

if [ ! -z $debug ]; then
echo "DEBUG:"
echo "TEMPOTOTAL $TEMPOTOTAL"
echo "TEMPOGC $TEMPOGC"
echo "FGC $FGC"
echo "FGCT $FGCT"
echo "CADATGC $CADATGC"
fi

MSG="Ultimo FGC gasta $TEMPOGC segundos, a cada $CADATGC seg faz um FGC|tempogc=$TEMPOGC;$WARN;$CRIT"

if [ $(echo " $TEMPOGC > $CRIT" | bc) -eq 1 ]; then
    echo "CRITICAL - $MSG"
    exit 2
elif [ $(echo " $TEMPOGC > $WARN" | bc) -eq 1 ]; then

    echo "WARNING - $MSG"
    exit 1
else
    echo "OK - $MSG"
    exit 0
fi