My cache memory cleaner

ccache

#!/bin/bash
function mem_help() {
	echo "*Clean up the memory*"
	echo "Usage: $0 [Options]"
	echo "Options:"
	echo "	-q, --quiet	Run without printing output"
	echo "	-h, --help	Print this help"
}

function mem_free() {
	sync
	echo 3 > /proc/sys/vm/drop_caches
}

function mem_graph() {
	type=(tot used free)

	#Set OLD usage
	declare -A mem_old=( [cmd]=$(free -t | grep Total:) )
	n=2
	for t in "${type[@]}"; do
		mem_old["$t"]=$(echo "${mem_old[cmd]}"  | awk '{ print $'"$n"' }')
		#echo "mem_old_"$t" = ${mem_old["$t"]}"
		n=$((n + 1))
	done

	#Empty cache
	mem_free

	#Set NOW usage
	declare -A mem_now=( [cmd]=$(free -t | grep Total:) )
	n=2
	for t in "${type[@]}"; do
		mem_now["$t"]=$(echo "${mem_now[cmd]}"  | awk '{ print $'"$n"' }')
		#echo "mem_now_"$t" = ${mem_now["$t"]}"
		n=$((n + 1))
	done

	#Prepare MBytes size
	for t in "${type[@]}"; do
		mem_old["$t"]=$((mem_old["$t"] / 1024))
		#echo "mem_old_"$t" = ${mem_old["$t"]}"
		mem_now["$t"]=$((mem_now["$t"] / 1024))
		#echo "mem_now_"$t" = ${mem_now["$t"]}"
	done

	echo "MByte	OLD	GAIN	NOW"
	echo "Free:	${mem_old[free]}	$((mem_now[free] - mem_old[free]))	${mem_now[free]}"
	echo "Used:	${mem_old[used]}	$((mem_old[used] - mem_now[used]))	${mem_now[used]}"
	echo "======	=====	=====	====="
	echo "Total:	${mem_old[tot]}	$((mem_old[tot] - mem_now[tot]))	${mem_now[tot]}"
}


if [[ "$#" -eq 0 ]]; then
	mem_graph
else
	case "$1" in
		-q)		mem_free ;;
		--quiet)	mem_free ;;
		*)		mem_help ;;
	esac
fi