Uploaded image for project: 'Apache Cassandra'
  1. Apache Cassandra
  2. CASSANDRA-11420

Add the JMX metrics to track the write amplification of C*

Agile BoardAttach filesAttach ScreenshotBulk Copy AttachmentsBulk Move AttachmentsVotersWatch issueWatchersCreate sub-taskConvert to sub-taskMoveLinkCloneLabelsUpdate Comment AuthorReplace String in CommentUpdate Comment VisibilityDelete Comments
    XMLWordPrintableJSON

Details

    • Improvement
    • Status: Resolved
    • Low
    • Resolution: Fixed
    • 3.6
    • None
    • None

    Description

      2016-03-24_02:30:38.39936 INFO 02:30:38 Completed flushing /data/cassandra/data/keyspace/column-family/column-family-tmp-ka-295782-Data.db (73.266MiB) for commitlog position ReplayPosition(segmentId=1458717183630, position=3690)

      It would be useful to expose the number of flushed bytes to JMX, so that we can monitor how many bytes are written by application and flushed to disk.

      I also expose the number of bytes written by compaction to JMX, so the WA can be calculated by dividing these two metrics

      Attachments

        Activity
          This comment will be Viewable by All Users Viewable by All Users
          Cancel

          People

            dikanggu Dikang Gu Assign to me
            dikanggu Dikang Gu
            Dikang Gu
            Marcus Eriksson
            Votes:
            0 Vote for this issue
            Watchers:
            3 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved:

              Slack

                Issue deployment