Shell script to capture cpu and memory usage of a process at certain intervals of time

Here is an automated shell script which can dump the memory and cpu usage of a process.

Useful when you want to monitor a process for a long period of time.

#!/bin/bash

if [ "$#" -ne 1 ]; then

echo "Usage ... [$0 ]"

exit

fi

pid=$1

# maxRunTime is used to control the maximum no of seconds for which to run this script.

maxRunTime=72000

# sleepTime is used to sleep for specified seconds, to take the memory dump again

sleepTime=30

logFile=${pid}_process.log

commandFile=${pid}_command.log

`ptree $pid >> $commandFile`;

`pargs $pid >> $commandFile`;

currentRunTime=0

while [ $currentRunTime -lt $maxRunTime ]

do

time=`date +%F::%X | tr -d '[\n]'`

line=`ps -eo pid,pcpu,vsz | grep $pid`;

echo "$time $line" >> $logFile

sleep $sleepTime

currentRunTime=`expr $currentRunTime + $sleepTime`

echo "Execution Time : ${currentRunTime} seconds [max ${maxRunTime}]"

done;