关键词：InfoSphere Streams 2.0；度量组件；Streams应用程序
摘 要：New to IBM InfoSphere Streams 2.0, the introduction of the metrics component provides runtime access to system and user-defined statistics than can be used to monitor the inner workings of your Streams application. This article outlines the new metrics system and describes how to access and use both system and user-defined metrics as part of your Streams application.