Consumer Groups
Consumer Groups
The Consumer Groups tab shows how messages are being consumed across topics in your cluster.
Overview
Lists all active and inactive consumer groups with:
- Group ID: The unique identifier for the consumer group.
- Members: Number of active consumers in the group.
- Topics subscribed: The topics this group is consuming from.
- Consumer lag: The difference between the latest offset and the last committed offset. High lag means consumers are falling behind producers.
- Coordinator broker: The broker responsible for managing this group's membership and offset commits.
Lag Monitoring
Consumer lag is the most important operational metric in this view.
| Lag | Interpretation |
|---|---|
| 0 | Consumer is fully caught up. |
| Low, stable | Minor delay, acceptable for most workloads. |
| High, growing | Consumer is falling behind. Investigate throughput or scaling. |
| High, stable | Consumer is processing at producer rate but has a historical backlog. |
Warning
Continuously growing lag indicates the consumer cannot keep up with the producer rate. This may affect downstream API Products that depend on real-time data.
Group Details
Selecting a group shows partition-level detail:
- Partition assignments: Which consumer in the group owns each partition.
- Current offset: The last committed offset per partition.
- Log end offset: The latest message offset in the partition.
- Lag per partition: Offset difference per partition, useful for identifying uneven consumption.
Use this view to verify that partitions are evenly distributed across group members and that no single consumer is a bottleneck.