function apache_tune {
	# Tunes Apache's memory to use the percentage of RAM you specify, defaulting to 40%

	# $1 - the percent of system memory to allocate towards Apache

	if [ ! -n "$1" ];
		then PERCENT=40
		else PERCENT="$1"
	fi

	aptitude -y install apache2-mpm-prefork
	PERPROCMEM=10 # the amount of memory in MB each apache process is likely to utilize
	MEM=$(grep MemTotal /proc/meminfo | awk '{ print int($2/1024) }') # how much memory in MB this system has
	MAXCLIENTS=$((MEM*PERCENT/100/PERPROCMEM)) # calculate MaxClients
	MAXCLIENTS=${MAXCLIENTS/.*} # cast to an integer
	sed -i -e "s/\(^[ \t]*MaxClients[ \t]*\)[0-9]*/\1$MAXCLIENTS/" /etc/apache2/apache2.conf

	touch /tmp/restart-apache2
}