How can I know which process is using swap?

Question

There is lots of memory avaiable(about 4G) but swap is used(200+M) in my fedora box.

I wonder which process is using swap. How can I know it.

ps and top only show the memory usage.

Thanks in advance.

Answer 1

Improving the cyberciti.biz command to show a more concise answer:

(echo "COMM PID SWAP"; for file in /proc/*/status ; do awk '/^Pid|VmSwap|Name/{printf $2 " " $3}END{ print ""}' $file; done | grep kB | grep -wv "0 kB" | sort -k 3 -n -r) | column -t

An example output:

COMM             PID    SWAP  
dockerd          662    2736  kB
skypeforlinux    26865  1320  kB
NetworkManager   303    1112  kB
slim             392    1028  kB
redis-server     350    204   kB