Class FlashJournalRM.CongestionStatistics

java.lang.Object
com.tangosol.io.journal.FlashJournalRM.CongestionStatistics
Enclosing class:
FlashJournalRM
protected class FlashJournalRM.CongestionStatistics extends Object
Journal-wide wall-clock congestion statistics. State transitions are serialized on this object and the authoritative JournalFile states are scanned when congestion clears, avoiding a waiter or file reference count.
Since:
Coherence 3.7
Author:
cp/cf 2010-06-10

  • Constructor Details

    • CongestionStatistics

      protected CongestionStatistics()

  • Method Details

    • recordCongestionStarted

      protected void recordCongestionStarted()
      Record a successful transition of a JournalFile to congestion. The caller must synchronize on this statistics object across the state transition and this method invocation.
      Since:
      26.1.0.0

    • recordCongestionEnded

      protected void recordCongestionEnded()
      Record a successful transition of a JournalFile out of congestion. The caller must synchronize on this statistics object across the state transition and this method invocation.
      Since:
      26.1.0.0

    • getTotalCongestionCount

      protected long getTotalCongestionCount()
      Return the number of journal-wide congestion episodes.
      Returns:
      the congestion episode count
      Since:
      26.1.0.0

    • getTotalCongestionTime

      protected long getTotalCongestionTime()
      Return the cumulative congestion time, including the current episode if one is in progress.
      Returns:
      the cumulative congestion time in milliseconds
      Since:
      26.1.0.0

    • getMaximumCongestionTime

      protected long getMaximumCongestionTime()
      Return the maximum congestion time, including the current episode if it is already the longest.
      Returns:
      the maximum congestion time in milliseconds
      Since:
      26.1.0.0

    • getCurrentCongestionTime

      protected long getCurrentCongestionTime()
      Return the elapsed time of the current congestion episode.
      Returns:
      the current congestion time in milliseconds, or zero
      Since:
      26.1.0.0

    • resetStatistics

      protected void resetStatistics()
      Reset congestion statistics. An episode in progress is split at the reset boundary and becomes the first episode in the new interval.
      Since:
      26.1.0.0