Swap usage Linux scripts and commands
To see SWAP usage by processes script:
#!/bin/sh
# Get current swap usage for all running processes
# Erik Ljungstrom 27/05/2011
SUM=0
OVERALL=0
for DIR in `find /proc/ -maxdepth 1 -type d | egrep “^/proc/[0-9]”` ; do
PID=`echo $DIR | cut -d / -f 3`
PROGNAME=`ps -p $PID -o comm –no-headers`
for SWAP in `grep Swap $DIR/smaps 2>/dev/null| awk ‘{ print $2 }’`
do
let SUM=$SUM+$SWAP
done
echo “PID=$PID – Swap used: $SUM – ($PROGNAME )”
let OVERALL=$OVERALL+$SUM
SUM=0
done
echo “Overall swap used: $OVERALL”
./getswap.sh | egrep -v “Swap used: 0” |sort -n -k 5
To see free memory and swap space:
free -hm
Top command to calculate swap usage:
top
(SWAP = VIRT – RES)