云原生弹性伸缩与规模工程 — 现象根因模型流程策略场景（续）序号现象根因模型核心数学表达式与方程式流程与策略典型场景379HPA在Eureka中心跳与续约弹性中频繁过期​Eureka客户端心跳频率高导致Server处理瓶颈，租约过期误判Eureka心跳模型​heartbeat_rate = instances × heartbeat_intervalserver_capacity = eureka_server_throughput条件式:if heartbeat_rate capacity THEN lease_expiration_misjudgment不等式:heartbeat_rate ≤ server_capacity