Analyze swap usage per process

analyze_swap_usage.sh

#!/bin/bash -i

# Get current swap usage for all running processes
# Originally written by Erik Ljungstrom 27/05/2011
# Modified by Nikolay Nechaev aka @kolayne

SUM=0
OVERALL=0

for DIR in `find /proc/ -maxdepth 1 -type d | grep -E "^/proc/[0-9]"` ; do
    PID=`echo $DIR | cut -d / -f 3`
    PROGNAME=`ps -p $PID -o cmd --no-headers` # | cut -d ' ' -f 1`

    for SWAP in `grep Swap $DIR/smaps 2>/dev/null| awk '{ print $2 }'`
    do  
        let SUM=$SUM+$SWAP
    done

    if [[ $SUM -eq 0 ]]; then
        continue
    fi  

    echo -e "PID=$PID\t- Swap used: $SUM\t- $PROGNAME" | expand -t 8 | cut -c-$(($COLUMNS - 1))
    let OVERALL=$OVERALL+$SUM
    SUM=0
done

echo "Overall swap used: $OVERALL"