def METHOD_NAME(self):
    free = -1
    avail = -1
    count = 0
    with open('/proc/meminfo', 'r') as f:
        for line in f.readlines():
            name, value = line.strip().split(':')
            if name == 'MemFree':
                free = int(value.strip().split()[0])
            elif name == 'MemAvailable':
                avail = int(value.strip().split()[0])
            else:
                continue
            count += 1
            if count >= 2:
                break
    return [free / 1024, avail / 1024]