Bash implementation of the vmrss linux util

vmrss

#!/usr/bin/env bash

if [[ "${1}" == "" ]]; then
	echo "must provide a process"
	exit 1
fi

while :
do
	ps -o rss "${1}" | tail -1 | numfmt --to=si
	sleep 1
done

vmrss is a useful utility that doesn't exist on macOS, but you can pretty easily recreate it using bash. This prints out the memory used by the provided process once every second, and prints it out in a friendly format. To see raw bytes, you can remove the | numfmt --to=si part.