Package org.apache.cassandra.metrics

Class CacheMetrics

  • Direct Known Subclasses:
    ChunkCacheMetrics
    public class CacheMetrics
extends java.lang.Object
    Metrics for ICache.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      com.codahale.metrics.Gauge<java.lang.Long> capacity
      Cache capacity in bytes
      com.codahale.metrics.Gauge<java.lang.Integer> entries
      Total number of cache entries
      protected MetricNameFactory factory  
      com.codahale.metrics.Gauge<java.lang.Double> fifteenMinuteHitRate
      15m hit rate
      com.codahale.metrics.Gauge<java.lang.Double> fiveMinuteHitRate
      5m hit rate
      com.codahale.metrics.Gauge<java.lang.Double> hitRate
      all time cache hit rate
      com.codahale.metrics.Meter hits
      Total number of cache hits
      com.codahale.metrics.Meter misses
      Total number of cache misses
      com.codahale.metrics.Gauge<java.lang.Double> oneMinuteHitRate
      1m hit rate
      com.codahale.metrics.Meter requests
      Total number of cache requests
      com.codahale.metrics.Gauge<java.lang.Long> size
      Total size of cache, in bytes

    • Constructor Summary

      Constructors 
      Constructor Description
      CacheMetrics​(java.lang.String type, CacheSize cache)
      Create metrics for given cache.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void reset()  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • capacity

        public final com.codahale.metrics.Gauge<java.lang.Long> capacity
        Cache capacity in bytes

      • size

        public final com.codahale.metrics.Gauge<java.lang.Long> size
        Total size of cache, in bytes

      • entries

        public final com.codahale.metrics.Gauge<java.lang.Integer> entries
        Total number of cache entries

      • hits

        public final com.codahale.metrics.Meter hits
        Total number of cache hits

      • misses

        public final com.codahale.metrics.Meter misses
        Total number of cache misses

      • requests

        public final com.codahale.metrics.Meter requests
        Total number of cache requests

      • hitRate

        public final com.codahale.metrics.Gauge<java.lang.Double> hitRate
        all time cache hit rate

      • oneMinuteHitRate

        public final com.codahale.metrics.Gauge<java.lang.Double> oneMinuteHitRate
        1m hit rate

      • fiveMinuteHitRate

        public final com.codahale.metrics.Gauge<java.lang.Double> fiveMinuteHitRate
        5m hit rate

      • fifteenMinuteHitRate

        public final com.codahale.metrics.Gauge<java.lang.Double> fifteenMinuteHitRate
        15m hit rate

    • Constructor Detail

      • CacheMetrics

        public CacheMetrics​(java.lang.String type,
                    CacheSize cache)
        Create metrics for given cache.
        Parameters:
        type - Type of Cache to identify metrics.
        cache - Cache to measure metrics

    • Method Detail

      • reset

        public void reset()