> For the complete documentation index, see [llms.txt](https://docs.kafka-eagle.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kafka-eagle.org/3.quickstart/8.metrics.md).

# 8.Metrics

## 3.8.1 Overview

Through JMX to obtain data, monitor the Kafka client, the production side, the number of messages, the number of requests, processing time and other data to visualize performance.

## 3.8.2 Kafka MBean

![kafka mbean](https://2708341048-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSTI3TBF5BtGEtijxByE4%2Fuploads%2Fgit-blob-8531c51c1715ada1637fb3df74b176b7ef11f04c%2Fkafka_mbean_metrics.png?alt=media)

## 3.8.3 Kafka Performance

![kafka chart](https://2708341048-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSTI3TBF5BtGEtijxByE4%2Fuploads%2Fgit-blob-3f9f22847c4140e7af01a75983e2038c267046c5%2Fkafka_chart_metrics.png?alt=media)

## 3.8.4 Kafka Broker Collection

EFAK monitoring summarizes the node data of the whole cluster. Through the monitoring chart, you can observe the running state of the cluster.

| Quota                           | Message                                                              |
| ------------------------------- | -------------------------------------------------------------------- |
| MessagesInPerSec                | Broker aggregate incoming message rate.                              |
| BytesInPerSec                   | Broker aggregate incoming byte rate.                                 |
| BytesOutPerSec                  | Broker aggregate outgoing byte rate.                                 |
| BytesRejectedPerSec             | Broker aggregate rejected byte rate.                                 |
| FailedFetchRequestsPerSec       | Broker fetch request rate for requests that failed.                  |
| FailedProduceRequestsPerSec     | Produce request rate for requests that failed.                       |
| ProduceMessageConversionsPerSec | The number of produce message conversions per second for the broker. |
| ReplicationBytesInPerSec        | Byte in rate from other brokers.                                     |
| ReplicationBytesOutPerSec       | Byte out rate to other brokers.                                      |
| TotalFetchRequestsPerSec        | Fetch request rate.                                                  |
| TotalProduceRequestsPerSec      | Produce request rate.                                                |
| FreePhysicalMemorySize          | Broker free memory size.                                             |