$ lsof / | awk '{ if($7 > 1048576) print $7/1048576 "MB" " " $9 " " $1 }' | sort -n -u | tail
Feb. 28, 2014, 3:34 a.m. — cellojoe
Show the largest 10 currently open files, the size of those files in Megabytes, and the name of the process holding the file open.