[熔断降级作用](%E7%86%94%E6%96%AD%E9%99%8D%E7%BA%A7%E4%BD%9C%E7%94%A8.md) [设置降级规则](%E8%AE%BE%E7%BD%AE%E9%99%8D%E7%BA%A7%E8%A7%84%E5%88%99.md)