在每个步骤中，它还会度量事务的各个组件在总响应时间中所占的比例。
At each step it also measures how each component of a transaction contributes to the overall response time.
第一种是，对于某一服务策略的请求，减少请求在队列中停留的时间（从而减少总响应时间）。
The first is to reduce the time ARFM keeps the request in the queue for traffic in that service policy (thus reducing the overall response time).
计算机将这个名称缓存到IP映射一段时间，这个时间段称为time to live (ttl)，以减少总响应时间。
Computers cache the name-to-IP mapping for a certain period of time, known as the time to live (TTL), to reduce overall response time.
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