Dear Community, I'd like to ask for some details about bytes related metrics in Flink. Precisely, I'm looking at *bytes sent* and *bytes received *metrics: what I am recording is the following:
I am reading from a Kafka topic *A* records with schema *K* using a source *Sin *belonging to a pipeline *P1*. The topic *A* is filled with *K* data using a separated pipeline *p2* and a sink *Sout*. Basically what I register is that the *bytes sent* metric of *Sin* - available through the Flink UI -measure twice or more respect of the *bytes received* of *Sout. *For instance, if my sink Sout records 10GB of *bytes received* inbound, then my source Sin emits between 20-25GB *bytes sent*. [image: Screenshot 2019-06-14 at 09.40.08.png] Is someone able to detail how these two metrics are calculated? Thank you, -- *Andrea Spina* Software Engineer @ Radicalbit Srl Via Borsieri 41, 20159, Milano - IT
