Kafka Home
Metrics that show overall status for the Kafka cluster.
| Row | Metrics | Description |
|---|---|---|
| BYTES IN & OUT / MESSAGES IN | Bytes In & Bytes Out /sec | Rate at which bytes are produced into the Kafka cluster and the rate at which bytes are being consumed from the Kafka cluster. |
| Messages In /sec | Number of messages produced into the Kafka cluster. | |
| CONTROLLER/LEADER COUNT & REPLICA MAXLAG | Active Controller Count | Number of active controllers in the Kafka cluster. This should always equal one. |
| Replica MaxLag | Shows the lag of each replica from the leader. | |
| Leader Count | Number of partitions for which a particular host is the leader. | |
| UNDER REPLICATED PATRITIONS & OFFLINE PARTITONS COUNT | Under Replicated Partitions | Indicates if any partitions in the cluster are under-replicated. |
| Offline Partitions Count | Indicates if any partitions are offline (which means that no leaders or replicas are available for producing or consuming). | |
| PRODUCER & CONSUMER REQUESTS | Producer Req /sec | Rate at which producer requests are made to the Kafka cluster. |
| Consumer Req /sec | Rate at which consumer requests are made from the Kafka cluster. | |
| LEADER ELECTION AND UNCLEAN LEADER ELECTIONS | Leader Election Rate | Rate at which leader election is happening in the Kafka cluster. |
| Unclean Leader Elections | Indicates if there are any unclean leader elections. Unclean leader election indicates that a replica which is not part of ISR is elected as a leader. | |
| ISR SHRINKS / ISR EXPANDED | IsrShrinksPerSec | If the broker goes down, ISR shrinks. In such case, this metric indicates if any of the partitions are not part of ISR. |
| IsrExpandsPerSec | Once the broker comes back up and catches up with the leader, this metric indicates if any partitions rejoined ISR. | |
| REPLICA FETCHER MANAGER | ReplicaFetcherManager MaxLag | The maximum lag in messages between the follower and leader replicas. |