A function node migration method, comprising: obtaining access related information of at least one call chain , wherein the access related information comprises at least one of the following information: a delay of each of N intervals comprised in the at least one call chain , and a quantity of interaction times between function nodes in each of the N intervals, wherein N is a positive integer greater than or equal to 1; determining , based on the access related information, one or more target intervals from the N intervals, determining P key nodes from a plurality of function nodes that form the one or more target intervals, wherein when the access related information comprises the delay of each of N intervals, the N intervals are sorted in descending order of delays of the N intervals, and top K 1 intervals are determined as the target intervals, K 1 is a positive integer greater than or equal to 1 and less than N, or, an interval in which the delay exceeds a delay threshold in the N intervals is determined as the target interval, wherein when the access related information comprises the quantity of interaction times between the function nodes in each of the N intervals, the N intervals are sorted in descending order of the quantity of interaction times between the function nodes in the N intervals, and the top K 2 intervals are determined as the target intervals, K 2 is a positive integer greater than or equal to 1 and less than N, or, an interval in which the quantity of interaction times exceeds a quantity threshold of interaction times in the N intervals is determined as the target interval; and migrating the P key nodes, wherein P is a positive integer greater than or equal to 1. obtaining access related information of at least one call chain , wherein the access related information comprises at least one of the following information: a delay of each of N intervals comprised in the at least one call chain , and a quantity of interaction times between function nodes in each of the N intervals, wherein N is a positive integer greater than or equal to 1; determining , based on the access related information, one or more target intervals from the N intervals, determining P key nodes from a plurality of function nodes that form the one or more target intervals, wherein when the access related information comprises the delay of each of N intervals, the N intervals are sorted in descending order of delays of the N intervals, and top K 1 intervals are determined as the target intervals, K 1 is a positive integer greater than or equal to 1 and less than N, or, an interval in which the delay exceeds a delay threshold in the N intervals is determined as the target interval, wherein when the access related information comprises the quantity of interaction times between the function nodes in each of the N intervals, the N intervals are sorted in descending order of the quantity of interaction times between the function nodes in the N intervals, and the top K 2 intervals are determined as the target intervals, K 2 is a positive integer greater than or equal to 1 and less than N, or, an interval in which the quantity of interaction times exceeds a quantity threshold of interaction times in the N intervals is determined as the target interval; and migrating the P key nodes, wherein P is a positive integer greater than or equal to 1. <EOS>