Kafka Broker Metrics

Here is the list of metrics based on MBeans exposed by Kafka broker.

Broker metrics:

Metric Name	Type	Attributes	Description
kafka.message.count	Counter		The number of messages received by the broker
kafka.request.count	Counter	type	The number of requests received by the broker
kafka.request.failed	Counter	type	The number of requests to the broker resulting in a failure
kafka.request.time.total	Counter	type	The total time the broker has taken to service requests
kafka.request.time.50p	Gauge	type	The 50th percentile time the broker has taken to service requests
kafka.request.time.99p	Gauge	type	The 99th percentile time the broker has taken to service requests
kafka.request.queue	UpDownCounter		Size of the request queue
kafka.network.io	Counter	direction	The bytes received or sent by the broker
kafka.purgatory.size	UpDownCounter	type	The number of requests waiting in purgatory
kafka.partition.count	UpDownCounter		The number of partitions on the broker
kafka.partition.offline	UpDownCounter		The number of partitions offline
kafka.partition.underReplicated	UpDownCounter		The number of under replicated partitions
kafka.isr.operation.count	UpDownCounter	operation	The number of in-sync replica shrink and expand operations
kafka.lag.max	Gauge		The max lag in messages between follower and leader replicas
kafka.controller.active.count	UpDownCounter		The number of controllers active on the broker
kafka.leaderElection.count	Counter		The leader election count
kafka.leaderElection.unclean.count	Counter		Unclean leader election count - increasing indicates broker failures

Log metrics:

Metric Name	Type	Description
kafka.logs.flush.count	Counter	Log flush count
kafka.logs.flush.time.50p	Gauge	Log flush time - 50th percentile
kafka.logs.flush.time.99p	Gauge	Log flush time - 99th percentile