process memory usage

[Lorenzo Santacana]

Hi all,

I want to check if a process has memory leaks so I need to monitor the memory usage of the process. Which is the command to check this? Using thye command "top" sometimes my process is not shown in the list.

Many thanks,
Lorenzo

[Scot Bean]

If you have glance, start it with "gpm" and you can monitor your individual application.

[A. Clay Stephenson · Accepted solution]

For a single process for which you know the process id (PID), do something like this in a loop.

UNIX95= ps -p PID -o vsz,comm

Note the space after UNIX95=. This asserts the XPG4 behavior in ps. Vsz displays the size of the process in KB.

Man ps for details.

[Sridhar Bhaskarla]

Hi Lorenzo,

Run

UNIX95= ps -e -o 'vsz pid args' |sort -n

periodically and check the processes whose vsz (first column) values are increasing over the time. They are most likely (not necessarily) the candidates of memory leaks. You will need to work with the vendor/developers to find the reason why the vsz is increasing over the time.

-Sri

[Geoff Wild]

Here's a little script for you:

# cat processmem
#!/bin/sh
# processmem - display memory claimed by a process
#
if [ $# -lt 1 -o \( $# -gt 1 -a $# -lt 4 \) ]
then
echo "Usage:"
echo "processmem \"process\""
echo "Example:"
echo "processmem rpc"
exit 1
fi
echo " "

PROCESS=$1

mps=0
#for sz in `ps -elf | grep $PROCESS | grep -v grep | awk '{print $10}'`
for sz in `UNIX95= ps -e -o vsz=Kbytes -o ruser -o pid,args=Command-Line | sort -rnk1 | grep -v Kbytes | grep $PROCESS | awk '{print $1}'`
do
mps=`expr $mps + $sz`
done
#echo `expr $mps \* 4096`
echo "\nMemory claimed by $PROCESS: $mps Kbytes.\n"


Rgds...Geoff

[Con O'Kelly]

Hi Lorenzo

There is also a utility called 'procsize' which is excellent for showing memory breakdown for each process. Use as follows:

# procsize -fnc | sort -rnk 11

I have attahced the binary.

It is available for download from:
ftp://eh:spear9@hprc.external.hp.com/procsize

Cheers
Con