# free
total used free shared buff/cache available
Mem: 16106332 3914228 367072 296508 11825032 11441608
Swap: 31250428 182924 31067504
# cat /proc/meminfo | grep ^Swap
SwapCached: 10056 kB
SwapTotal: 31250428 kB
SwapFree: 31067504 kB
# for file in /proc/*/status ; do
awk '/VmSwap|Name/{
if ( $2 != "0" )
printf $2 " " $3
}END{ print ""}' $file
done | grep kB | sort -k 2 -n -r
mysqld 29988 kB
plasmashell 19096 kB
kwin_x11 13444 kB