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• This KIP proposes the addition of latency and throughput metrics for Kafka Streams at the granularity of each processor node and the addition of count metrics at the granularity of each task. This is in addition to the global rate (which already exists). The idea is to allow users to toggle the recording of these metrics when needed for debugging. The RecordLevel for these granular metrics is debug and a client can toggle the record level by changing the  “metrics.record.level” in the client config. (The introduction of RecordLevel and client config changes are covered in a the separate KIP-105).
• This KIP also proposes exposing the metrics registry and several helper functions so that Kafka Streams users can register their own metrics. 

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