June 2012 – Jason R. Ralph

Here I needed to kill a c++ process that was leaking memory in order to save the server from meltdown. Very simple while loop that calls the external command “free” and parses it’s output with awk to store a variable. Pretty neat and it works.

#!/bin/bash

# Server memory capacity 48GB
PKILL=$(which pkill)
ECHO=$(which echo)
thresHold=47500
BASH=$(which bash)

while true
do 
    highMem=$(free -m | awk '/^\-/' | awk '{print $3}')
    $ECHO $highMem
        if [ $highMem -ge $thresHold ] 
            then 
                $ECHO "We reached the memory limit"
                $PKILL processName
                $BASH /opt/code/bin/application_starter.sh > /dev/null 2>&1
            else
                $ECHO "Memory is under control"
        fi     
sleep 60
done

#!/bin/bash

# Server memory capacity 48GB

PKILL=$(which pkill)

ECHO=$(which echo)

thresHold=47500

BASH=$(which bash)

while true

highMem=$(free -m | awk '/^\-/' | awk '{print $3}')

$ECHO $highMem

if [ $highMem -ge $thresHold ]

then

$ECHO "We reached the memory limit"

$PKILL processName

$BASH /opt/code/bin/application_starter.sh > /dev/null 2>&1

else

$ECHO "Memory is under control"

sleep 60

done

Jason

Jason R. Ralph

Linux All Day Everyday

Month: June 2012

Linux Restart Process / Application When Memory Threshold Is Reached