diff --git a/content/en/40/operations/monitoring.md b/content/en/40/operations/monitoring.md
index 3206676bf0..8a51944730 100644
--- a/content/en/40/operations/monitoring.md
+++ b/content/en/40/operations/monitoring.md
@@ -89,34 +89,8 @@ kafka.server:type=BrokerTopicMetrics,name=ReplicationBytesInPerSec
Byte in (from the other brokers) rate across all topics.
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-Controller Request rate from Broker
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-kafka.controller:type=ControllerChannelManager,name=RequestRateAndQueueTimeMs,brokerId=([0-9]+)
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-The rate (requests per second) at which the ControllerChannelManager takes requests from the queue of the given broker. And the time it takes for a request to stay in this queue before it is taken from the queue.
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-Controller Event queue size
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-kafka.controller:type=ControllerEventManager,name=EventQueueSize
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-Size of the ControllerEventManager's queue.
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Controller Event queue time
@@ -389,20 +363,7 @@ kafka.log:type=LogManager,name=OfflineLogDirectoryCount
0
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-Leader election rate
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-kafka.controller:type=ControllerStats,name=LeaderElectionRateAndTimeMs
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-non-zero when there are broker failures
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Unclean leader election rate
@@ -428,59 +389,7 @@ kafka.controller:type=KafkaController,name=ActiveControllerCount
only one broker in the cluster should have 1
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-Pending topic deletes
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-kafka.controller:type=KafkaController,name=TopicsToDeleteCount
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-Pending replica deletes
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-kafka.controller:type=KafkaController,name=ReplicasToDeleteCount
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-Ineligible pending topic deletes
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-kafka.controller:type=KafkaController,name=TopicsIneligibleToDeleteCount
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-Ineligible pending replica deletes
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-kafka.controller:type=KafkaController,name=ReplicasIneligibleToDeleteCount
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\# of under replicated partitions (|ISR| < |all replicas|)
diff --git a/content/en/41/operations/monitoring.md b/content/en/41/operations/monitoring.md
index b2e583cc08..a8c95b3f30 100644
--- a/content/en/41/operations/monitoring.md
+++ b/content/en/41/operations/monitoring.md
@@ -89,34 +89,8 @@ kafka.server:type=BrokerTopicMetrics,name=ReplicationBytesInPerSec
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Byte in (from the other brokers) rate across all topics.
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-Controller Request rate from Broker
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-kafka.controller:type=ControllerChannelManager,name=RequestRateAndQueueTimeMs,brokerId=([0-9]+)
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-The rate (requests per second) at which the ControllerChannelManager takes requests from the queue of the given broker. And the time it takes for a request to stay in this queue before it is taken from the queue.
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-Controller Event queue size
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-kafka.controller:type=ControllerEventManager,name=EventQueueSize
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-Size of the ControllerEventManager's queue.
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Controller Event queue time
@@ -389,20 +363,7 @@ kafka.log:type=LogManager,name=OfflineLogDirectoryCount
0
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-Leader election rate
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-kafka.controller:type=ControllerStats,name=LeaderElectionRateAndTimeMs
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-non-zero when there are broker failures
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Unclean leader election rate
@@ -441,59 +402,7 @@ kafka.controller:type=KafkaController,name=ActiveControllerCount
only one broker in the cluster should have 1
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-Pending topic deletes
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-kafka.controller:type=KafkaController,name=TopicsToDeleteCount
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-Pending replica deletes
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-kafka.controller:type=KafkaController,name=ReplicasToDeleteCount
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-Ineligible pending topic deletes
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-kafka.controller:type=KafkaController,name=TopicsIneligibleToDeleteCount
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-Ineligible pending replica deletes
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-kafka.controller:type=KafkaController,name=ReplicasIneligibleToDeleteCount
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\# of under replicated partitions (|ISR| < |all replicas|)
diff --git a/content/en/42/operations/monitoring.md b/content/en/42/operations/monitoring.md
index 0b7ceab67e..4b83a9c28c 100644
--- a/content/en/42/operations/monitoring.md
+++ b/content/en/42/operations/monitoring.md
@@ -89,47 +89,34 @@ kafka.server:type=BrokerTopicMetrics,name=ReplicationBytesInPerSec
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Byte in (from the other brokers) rate across all topics.
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-
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-Controller Request rate from Broker
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-kafka.controller:type=ControllerChannelManager,name=RequestRateAndQueueTimeMs,brokerId=([0-9]+)
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-The rate (requests per second) at which the ControllerChannelManager takes requests from the queue of the given broker. And the time it takes for a request to stay in this queue before it is taken from the queue.
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+
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-Controller Event queue size
+Controller Event queue time
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-kafka.controller:type=ControllerEventManager,name=EventQueueSize
+kafka.controller:type=ControllerEventManager,name=EventQueueTimeMs
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-Size of the ControllerEventManager's queue.
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+Time that takes for any event (except the Idle event) to wait in the ControllerEventManager's queue before being processed
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+
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-Controller Event queue time
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+Controller Event thread idle ratio
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-kafka.controller:type=ControllerEventManager,name=EventQueueTimeMs
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+kafka.controller:type=ControllerEventManager,name=AvgIdleRatio
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-Time that takes for any event (except the Idle event) to wait in the ControllerEventManager's queue before being processed
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+The average fraction of time the controller event thread is idle as opposed to processing events. Between 0 and 1, ideally > 0.5
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Request rate
@@ -389,20 +376,7 @@ kafka.log:type=LogManager,name=OfflineLogDirectoryCount
0
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-Leader election rate
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-kafka.controller:type=ControllerStats,name=LeaderElectionRateAndTimeMs
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-non-zero when there are broker failures
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+
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Unclean leader election rate
@@ -441,59 +415,7 @@ kafka.controller:type=KafkaController,name=ActiveControllerCount
only one broker in the cluster should have 1
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-Pending topic deletes
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-kafka.controller:type=KafkaController,name=TopicsToDeleteCount
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-Pending replica deletes
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-kafka.controller:type=KafkaController,name=ReplicasToDeleteCount
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-Ineligible pending topic deletes
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-kafka.controller:type=KafkaController,name=TopicsIneligibleToDeleteCount
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-Ineligible pending replica deletes
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-kafka.controller:type=KafkaController,name=ReplicasIneligibleToDeleteCount
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\# of under replicated partitions (|ISR| < |all replicas|)
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