@dataclass
class MemorySnapshot:
    """A snapshot of memory usage.

    Args:
        total_bytes: Total memory available in the system.
        current_bytes: Memory usage of the current Python process and its children.
        max_memory_bytes: The maximum memory that can be used by `AutoscaledPool`.
        max_used_memory_ratio: The maximum acceptable ratio of `current_bytes` to `max_memory_bytes`.
        created_at: The time at which the measurement was taken.
    """

    total_bytes: int
    current_bytes: int
    max_memory_bytes: int
    max_used_memory_ratio: float
    created_at: datetime = field(default_factory=lambda: datetime.now(tz=timezone.utc))

    @property
    def is_overloaded(self) -> bool:
        """Returns whether the memory is considered as overloaded."""
        return (self.current_bytes / self.max_memory_bytes) > self.max_used_memory_ratio