Kafka consumer metric in Micronaut application

Question

I have seen something confusing me when I am querying some Kafka consumer metrics of an application (Micronaut application with kafka integration) on NewRelic,

for example, I want to know about the total consumed records number, I can see

• kafka_consumer_records_consumed_total_records_total (1)
• kafka_consumer_fetch_manager_records_consumed_total (2)

The first one is a metric returned by /prometheus endpoint exposed by the application (the application is using Prometheus exporter and exposes an /prometheus endpoint by Micronaut)

The second one looks like the same metric but in a Kafka JMX Mbean syntax. I can see the below definition in the official Kafka consumer metrics document

Fetch Metrics
MBean: kafka.consumer:type=consumer-fetch-manager-metrics,client-id=”{client-id}”

records-consumed-total
The total number of records consumed.

These two metrics gave me a very different result (the second one gave a much more bigger value than the first one).

I would like to know what is the difference between these two metrics?

Regards.