INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!

Talk With Other Members
Be Notified Of Responses
To Your Posts
Keyword Search
One-Click Access To Your
Favorite Forums
Automated Signatures
On Your Posts
Best Of All, It's Free!

Join Us!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Tek-Tips Posting Policies

Home > Forums > MIS/IT > Operating Systems - UNIX based > IBM: AIX > FAQs

IBM: AIX FAQ

Troubleshooting

How can I find out if I have a memory leak and if so, what is causing it? by cspilman

faq52-6306

Posted: 26 May 06 (Edited 5 Aug 10)

This script will give a pretty good idea if you have memory leaks and what might be causing it. It's not the prettiest and can probably be simplified but it does what it was designed to do, find memory leaks if you have them.

This has been tested to work on AIX 6.1 and below:

CODE

#!/bin/ksh

echo "\n\nPlease wait..."

if [ ! -f /tmp/ps.before ] ; then
        ps -e -o pid,vsz,ruser,etime,args | awk '!/defunct/{print $1","$2","$3","$4","$5,$6,$7}' > /tmp/ps.before
fi

ps -e -o pid,vsz,ruser,etime,args | awk '!/defunct/{print $1","$2","$3","$4","$5,$6,$7}' > /tmp/ps.after

cat /tmp/ps.before /tmp/ps.after > /tmp/ps.total

awk -F, '! /PID/{print $1,$2,$3,$4,$5,$6,$7}' /tmp/ps.before | while read pid vsz ruser etime command a b
do
       num_procs=`grep -c "^${pid}," /tmp/ps.total`
       if [ "${num_procs}" -eq 2 ] ; then
               after_vsz=`awk -F, '/'"^${pid},"'/{print $2}' /tmp/ps.before`
               ((delta=vsz-after_vsz))
               echo "${pid}\t${vsz}\t\t${after_vsz}\t\t${delta}\t${ruser}\t${etime}\t${command} $a $b"
       fi
done > /tmp/ps.after.tmp

#clear
echo "PID\tVSZ SIZE BEFORE\tVSZ SIZE AFTER\tDELTA\tUSER\tELAPSED TIME\tCOMMAND"
echo "---\t---------------\t--------------\t-----\t----\t------------\t-------"
sort +3 /tmp/ps.after.tmp

VSB=`awk '{ sum += $2 } END { print "Total VSZ Before:                ", sum }' /tmp/ps.after.tmp`
VSA=`awk '{ sum += $3 } END { print "Total VSZ After:         ", sum }' /tmp/ps.after.tmp`
DELTA=`awk '{ sum += $4 } END { print "Total Delta:                   ", sum }' /tmp/ps.after.tmp`

rm /tmp/ps.after*
rm /tmp/ps.total

start_date=`ls -la /tmp/ps.before | awk '{print $6,$7}'`

echo "\n\nRunning against ps.before file with date of:  ${start_date}"
echo "\n\n${VSB}"
echo "${VSA}"
echo "${DELTA}"
echo "Total Defunct Processes Found:    `ps -ef | grep -c [d]efunct`"

Back to IBM: AIX FAQ Index
Back to IBM: AIX Forum

My Archive

My FAQ Archive

Contact US