def content_size_exceeded_max(self, content_bytes):
        '''
        `sys.getsizeof` works great for this use case because we have a byte
        sequence, and not a recursive nested structure. The unit of Memcache
        `item_size_max` is also bytes.

        :rettype: tuple(bool, int)
        '''
        content_size = sys.getsizeof(content_bytes)
        if content_size > self.item_size_max():
            return (True, content_size)

        return (False, content_size)