Question

How are the SDC Metrics collected and what do they represent?

Answer

The graphs on the SDC Metrics page in StreamSets Data Collector and the Metrics tab of the Execution Engine page in Control Hub are system-level metrics collected from standard Java core libraries. They should roughly correspond with metrics reported by other system-level tools, such as top and uptime at the command line, as well as external monitoring tools that show system-level metrics. Note that the numbers reported by different tools won’t match each other exactly due to differences in reporting intervals and other factors, but there should be a correlation.