In Linux, how to tell how much memory processes are using?

Question

I think I may have a memory leak in my LAMP application (memory gets used up, swap starts getting used, etc.). If I could see how much memory the various processes are using

Answer 1

Thanks. I used this to create this simple bash script that can be used to watch a process and its memory usage:

$ watch watchmypid.sh

#!/bin/bash
#

PROCESSNAME=changethistoyourprocessname
MYPID=`pidof $PROCESSNAME`

echo "=======";
echo PID:$MYPID
echo "--------"
Rss=`echo 0 $(cat /proc/$MYPID/smaps  | grep Rss | awk '{print $2}' | sed 's#^#+#') | bc;`
Shared=`echo 0 $(cat /proc/$MYPID/smaps  | grep Shared | awk '{print $2}' | sed 's#^#+#') | bc;`
Private=`echo 0 $(cat /proc/$MYPID/smaps  | grep Private | awk '{print $2}' | sed 's#^#+#') | bc;`
Swap=`echo 0 $(cat /proc/$MYPID/smaps  | grep Swap | awk '{print $2}' | sed 's#^#+#') | bc;`
Pss=`echo 0 $(cat /proc/$MYPID/smaps  | grep Pss | awk '{print $2}' | sed 's#^#+#') | bc;`

Mem=`echo "$Rss + $Shared + $Private + $Swap + $Pss"|bc -l`

echo "Rss     " $Rss
echo "Shared  " $Shared
echo "Private " $Private
echo "Swap    " $Swap
echo "Pss     " $Pss
echo "=================";
echo "Mem     " $Mem
echo "=================";