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Comment: Metric LeaderDelayQueue changed to LeaderOverThrottledRate

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  • LeaderReplicationThrottledRate: The rate of throttled replication for transmitted bytes from a broker. LeaderDelayQueue: The number of replication requests queued for future publication
  • LeaderOverThrottledRate: The difference between the throttled rate calculated by the leader, when partitions the response is formed from the log, and the rate actually sent to the follower.  
  • FollowerReplicationThrottledRate: The rate of throttled replication for transmitted bytes into a broker.
  • PartitionBytesInRate: Equivalent to BytesInPerSec, but at a partition level (i.e. total traffic - throttled and not throttled). This is required for estimating how long a rebalance will take to complete. B/s. See usability section below.
  • SumReplicaLag: This is the sum of all replica lag values on the broker. This metric is used to monitor progress of a rebalance and is particularly useful for determining if the rebalance has become stuck due to an overly harsh throttle value (as the metric will stop decreasing).

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