Package com.tangosol.net.cache

Interface CacheStatistics

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      double getAverageGetMillis()
      Determine the average number of milliseconds per get() invocation since the cache statistics were last reset.
      double getAverageHitMillis()
      Determine the average number of milliseconds per get() invocation that is a hit.
      double getAverageMissMillis()
      Determine the average number of milliseconds per get() invocation that is a miss.
      double getAveragePutMillis()
      Determine the average number of milliseconds per put() invocation since the cache statistics were last reset.
      long getCacheHits()
      Determine the rough number of cache hits since the cache statistics were last reset.
      long getCacheHitsMillis()
      Determine the total number of milliseconds (since the last statistics reset) for the get() operations for which an entry existed in this map.
      long getCacheMisses()
      Determine the rough number of cache misses since the cache statistics were last reset.
      long getCacheMissesMillis()
      Determine the total number of milliseconds (since the last statistics reset) for the get() operations for which no entry existed in this map.
      long getCachePrunes()
      Determine the rough number of cache pruning cycles since the cache statistics were last reset.
      long getCachePrunesMillis()
      Determine the total number of milliseconds (since the last statistics reset) spent on cache pruning.
      double getHitProbability()
      Determine the rough probability (0 <= p <= 1) that the next invocation will be a hit, based on the statistics collected since the last reset of the cache statistics.
      long getTotalGets()
      Determine the total number of get() operations since the cache statistics were last reset.
      long getTotalGetsMillis()
      Determine the total number of milliseconds spent on get() operations since the cache statistics were last reset.
      long getTotalPuts()
      Determine the total number of put() operations since the cache statistics were last reset.
      long getTotalPutsMillis()
      Determine the total number of milliseconds spent on put() operations since the cache statistics were last reset.
      void resetHitStatistics()
      Reset all of the cache statistics.

    • Method Detail

      • getTotalGets

        long getTotalGets()
        Determine the total number of get() operations since the cache statistics were last reset.
        Returns:
        the total number of get() operations

      • getTotalGetsMillis

        long getTotalGetsMillis()
        Determine the total number of milliseconds spent on get() operations since the cache statistics were last reset.
        Returns:
        the total number of milliseconds processing get() operations

      • getAverageGetMillis

        double getAverageGetMillis()
        Determine the average number of milliseconds per get() invocation since the cache statistics were last reset.
        Returns:
        the average number of milliseconds per get() operation

      • getTotalPuts

        long getTotalPuts()
        Determine the total number of put() operations since the cache statistics were last reset.
        Returns:
        the total number of put() operations

      • getTotalPutsMillis

        long getTotalPutsMillis()
        Determine the total number of milliseconds spent on put() operations since the cache statistics were last reset.
        Returns:
        the total number of milliseconds processing put() operations

      • getAveragePutMillis

        double getAveragePutMillis()
        Determine the average number of milliseconds per put() invocation since the cache statistics were last reset.
        Returns:
        the average number of milliseconds per put() operation

      • getCacheHits

        long getCacheHits()
        Determine the rough number of cache hits since the cache statistics were last reset.

        A cache hit is a read operation invocation (e.g. get()) for which an entry exists in this map.

        Returns:
        the number of get() calls that have been served by existing cache entries

      • getCacheHitsMillis

        long getCacheHitsMillis()
        Determine the total number of milliseconds (since the last statistics reset) for the get() operations for which an entry existed in this map.
        Returns:
        the total number of milliseconds for the get() operations that were hits

      • getAverageHitMillis

        double getAverageHitMillis()
        Determine the average number of milliseconds per get() invocation that is a hit.
        Returns:
        the average number of milliseconds per cache hit

      • getCacheMisses

        long getCacheMisses()
        Determine the rough number of cache misses since the cache statistics were last reset.

        A cache miss is a get() invocation that does not have an entry in this map.

        Returns:
        the number of get() calls that failed to find an existing cache entry because the requested key was not in the cache

      • getCacheMissesMillis

        long getCacheMissesMillis()
        Determine the total number of milliseconds (since the last statistics reset) for the get() operations for which no entry existed in this map.
        Returns:
        the total number of milliseconds (since the last statistics reset) for the get() operations that were misses

      • getAverageMissMillis

        double getAverageMissMillis()
        Determine the average number of milliseconds per get() invocation that is a miss.
        Returns:
        the average number of milliseconds per cache miss

      • getHitProbability

        double getHitProbability()
        Determine the rough probability (0 <= p <= 1) that the next invocation will be a hit, based on the statistics collected since the last reset of the cache statistics.
        Returns:
        the cache hit probability (0 <= p <= 1)

      • getCachePrunes

        long getCachePrunes()
        Determine the rough number of cache pruning cycles since the cache statistics were last reset.

        For the LocalCache implementation, this refers to the number of times that the prune() method is executed.

        Returns:
        the total number of cache pruning cycles (since the last statistics reset)

      • getCachePrunesMillis

        long getCachePrunesMillis()
        Determine the total number of milliseconds (since the last statistics reset) spent on cache pruning.

        For the LocalCache implementation, this refers to the time spent in the prune() method.

        Returns:
        the total number of milliseconds (since the last statistics reset) for cache pruning operations

      • resetHitStatistics

        void resetHitStatistics()
        Reset all of the cache statistics.

        Note that the method name implies that only the hit statistics are cleared, which is not the case; all of the statistics are cleared.