Uploaded image for project: 'Couchbase Server'
  1. Couchbase Server
  2. MB-44673

Handle decimation levels changing

    XMLWordPrintable

Details

    • Bug
    • Resolution: Unresolved
    • Major
    • backlog
    • Cheshire-Cat
    • ns_server
    • None
    • Untriaged
    • 1
    • Unknown

    Description

      Timofey asked:

      If we change levels and new intervals are not multiples of old intervals, decimation will erase all the stats that was collected before the levels change. Is that correct?
      Example:

        [{level1, 1d, 61}] -> [{level1, 1d, 67}]
      

      Steve Watanabe

      Yes, if new decimation levels are not aligned with the prior ones then older data may be lost. e.g. if the existing stats were decimated to 1 stat per every 7 minutes and it's changed to 1 every 9 minutes then the alignment is off except every 63 minutes.

      Timofey Barmin
      I guess we should prevent stats disappearance

      Attachments

        Issue Links

          Activity

            People

              dfinlay Dave Finlay
              steve.watanabe Steve Watanabe
              Votes:
              0 Vote for this issue
              Watchers:
              5 Start watching this issue

              Dates

                Created:
                Updated:

                PagerDuty