find /proc/*/fd -ls 2>/dev/null | grep '(deleted)'

find /proc/*/fd -ls 2>/dev/null | grep '(deleted)'
    | sed 's!.*(/proc[^ ]*).*!1!' | xargs ls -lhas

find /proc/*/fd -ls 2>/dev/null | grep '(deleted)'
     | sed 's!.*(/proc[^ ]*).*!1!' | xargs wc -c | sort -nr |head -n 20

2809946696 total
2387677184 /proc/15050/fd/26
  67108864 /proc/1626/fd/23
  67108864 /proc/1059/fd/6
  10485760 /proc/11417/fd/298
  10485760 /proc/11417/fd/239
  10485760 /proc/11417/fd/155
  10485760 /proc/11366/fd/499