Script to show combined memory usage share by a program along memory size used.

ls-mem

#!/bin/bash
user=$1
ps `if [ -n "$user" ]; then echo "-u $user"; else echo "-A"; fi` --sort -rss -o comm,pmem,rss | awk '
  NR == 1 { print; next }
  { a[$1] += $2; b[$1] += $3;}
  END {
    split("B KB MB GB TB PB", unit)
    for (i in a) {
      human_readable  = size_in_bytes = b[i] * 1024
      j = 1
      while ((human_readable_temp = int(human_readable / 1024)) != 0) {
        human_readable = human_readable_temp
        j++
      }
      printf "%-20s\t%s\t%s%s\t%s\n", i, a[i], human_readable, unit[j], b[i]
    }
  }
' | awk 'NR>1' | sort -rnk4 | awk '
  BEGIN {printf "%-20s\t%%MEM\tSIZE\n", "COMMAND"}
  {
    printf "%-20s\t%s\t%s\n", $1, $2, $3
  }
'