Metrics for Aiven for Apache Kafka® Connect available via Prometheus
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Below you can find a summary of every metric available via Prometheus for an Aiven for Apache Kafka® Connect service. You can review the list of metrics available via Prometheus for the Aiven for Apache Kafka® service in the :doc:`dedicated document </docs/products/kafka/reference/kafka-metrics-prometheus>`.

A full description of the metrics is available in the `Connect Monitoring section of the Apache Kafka® documentation <https://kafka.apache.org/documentation/#connect_monitoring>`_.

.. Note::

    The metrics only appear if there's actual activity in the underlying Apache Kafka Connect service.


* ``kafka_connect_connect_worker_metrics_connector_count``: the number of connectors run in this worker
* ``kafka_connect_connect_worker_metrics_connector_startup_attempts_total``: the total number of connector startups that this worker has attempted
* ``kafka_connect_connect_worker_metrics_connector_startup_failure_percentage``: the average percentage of this worker's connector starts that failed
* ``kafka_connect_connect_worker_metrics_connector_startup_failure_total``: the total number of connector starts that failed
* ``kafka_connect_connect_worker_metrics_connector_startup_success_percentage``: the average percentage of this worker's connector starts that succeeded
* ``kafka_connect_connect_worker_metrics_connector_startup_success_total``: the total number of connector starts that succeeded
* ``kafka_connect_connect_worker_metrics_task_count``: the number of tasks run in this worker
* ``kafka_connect_connect_worker_metrics_task_startup_attempts_total``: the total number of task startups that this worker has attempted
* ``kafka_connect_connect_worker_metrics_task_startup_failure_percentage``: the average percentage of this worker's task starts that failed
* ``kafka_connect_connect_worker_metrics_task_startup_failure_total``: the total number of task starts that failed
* ``kafka_connect_connect_worker_metrics_task_startup_success_percentage``: the average percentage of this worker's task starts that succeeded
* ``kafka_connect_connect_worker_metrics_task_startup_success_total``: the total number of task starts that succeeded
* ``kafka_connect_connect_worker_rebalance_metrics_completed_rebalances_total``: the total number of rebalances completed by this worker
* ``kafka_connect_connect_worker_rebalance_metrics_epoch``: the epoch or generation number of this worker
* ``kafka_connect_connect_worker_rebalance_metrics_rebalance_avg_time_ms``: the average time in milliseconds spent by this worker to rebalance
* ``kafka_connect_connect_worker_rebalance_metrics_rebalancing``: whether this worker is currently rebalancing
* ``kafka_connect_connect_worker_rebalance_metrics_time_since_last_rebalance_ms``: the time in milliseconds since this worker completed the most recent rebalance