Duration indication method and device and electronic equipment

The embodiment of the invention provides a duration indication method and device and electronic equipment. The method comprises the following steps: determining the tolerable running time length of a preset type domain name according to the resolution success rate of the preset type domain name and/or the change condition of the average resolution time delay of a recursive cache side; if a root fault notification is received, sending indication information to a root fault emergency strategy response system, the indication information comprising the tolerable operation duration, and the indication information being used for indicating the root fault emergency strategy response system to formulate a root fault recovery strategy based on the tolerable operation duration. Therefore, powerful support can be provided for formulating a root fault repair strategy, and the rationality of the formulated strategy is improved. 本申请实施例提供一种时长指示方法、装置及电子设备。方法包括：根据预设类型域名的解析成功率和/或递归缓存侧平均解析时延的变化情况，确定预设类型域名的可容忍运行时长。若接收到根故障通知，则向根故