A script that shows swap used by process.

Keep in mind there are shared pages, so the overall/summary will
be higher than the actual.

SWAP_USED

@@ -0,0 +1,29 @@
+#!/bin/bash
+# Get current swap usage for all running processes
+# Erik Ljungstrom 27/05/2011
+# Modified by Mikko Rantalainen 2012-08-09
+# Pipe the output to "sort -nk3" to get sorted output
+# Enhanced by Doncho Gunchev <dgunchev@gmail.com> to use sudo 2012-12-18 18:16:02
+# see http://stackoverflow.com/questions/479953/how-to-find-out-which-processes-are-swapping-in-linux
+
+if [ "$UID" != "0" ]; then
+    exec sudo "$0" "$@"
+fi
+
+SUM=0
+OVERALL=0
+for DIR in `find /proc/ -maxdepth 1 -type d -regex "^/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
+    if (( $SUM > 0 )); then
+        echo "PID=$PID swapped $SUM KB ($PROGNAME)"
+    fi
+    let OVERALL=$OVERALL+$SUM
+    SUM=0
+done
+echo "Overall swap used: $OVERALL KB"