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Casandra Metrics

The JMX Metric Gatherer provides built in Cassandra metric gathering capabilities. These metrics are sourced from Cassandra's exposed Dropwizard Metrics for each node: https://cassandra.apache.org/doc/latest/operating/metrics.html.

Metrics

Client Request Metrics

  • Name: cassandra.client.request.range_slice.latency.50p

  • Description: Token range read request latency - 50th percentile

  • Unit: µs

  • Instrument Type: DoubleValueObserver

  • Name: cassandra.client.request.range_slice.latency.99p

  • Description: Token range read request latency - 99th percentile

  • Unit: µs

  • Instrument Type: DoubleValueObserver

  • Name: cassandra.client.request.range_slice.latency.max

  • Description: Maximum token range read request latency

  • Unit: µs

  • Instrument Type: DoubleValueObserver

  • Name: cassandra.client.request.read.latency.50p

  • Description: Standard read request latency - 50th percentile

  • Unit: µs

  • Instrument Type: DoubleValueObserver

  • Name: cassandra.client.request.read.latency.99p

  • Description: Standard read request latency - 99th percentile

  • Unit: µs

  • Instrument Type: DoubleValueObserver

  • Name: cassandra.client.request.read.latency.max

  • Description: Maximum standard read request latency

  • Unit: µs

  • Instrument Type: DoubleValueObserver

  • Name: cassandra.client.request.write.latency.50p

  • Description: Regular write request latency - 50th percentile

  • Unit: µs

  • Instrument Type: DoubleValueObserver

  • Name: cassandra.client.request.write.latency.99p

  • Description: Regular write request latency - 99th percentile

  • Unit: µs

  • Instrument Type: DoubleValueObserver

  • Name: cassandra.client.request.write.latency.max

  • Description: Maximum regular write request latency

  • Unit: µs

  • Instrument Type: DoubleValueObserver

  • Name: cassandra.client.request.count

  • Description: Number of requests by operation

  • Labels: operation

  • Unit: 1

  • Instrument Type: LongSumObserver

  • Name: cassandra.client.request.error.count

  • Description: Number of request errors by operation

  • Labels: operation, status

  • Unit: 1

  • Instrument Type: LongSumObserver

Compaction Metrics

  • Name: cassandra.compaction.tasks.completed

  • Description: Number of completed compactions since server [re]start

  • Unit: 1

  • Instrument Type: LongSumObserver

  • Name: cassandra.compaction.tasks.pending

  • Description: Estimated number of compactions remaining to perform

  • Unit: 1

  • Instrument Type: LongValueObserver

Storage Metrics

  • Name: cassandra.storage.load.count

  • Description: Size of the on disk data size this node manages

  • Unit: by

  • Instrument Type: LongValueObserver

  • Name: cassandra.storage.total_hints.count

  • Description: Number of hint messages written to this node since [re]start

  • Unit: 1

  • Instrument Type: LongSumObserver

  • Name: cassandra.storage.total_hints.in_progress.count

  • Description: Number of hints attempting to be sent currently

  • Unit: 1

  • Instrument Type: LongValueObserver