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  1. Cassandra
  2. CASSANDRA-12676

Message coalescing regression

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Normal
    • Resolution: Fixed
    • Fix Version/s: 3.11.0, 4.0
    • Component/s: None
    • Labels:
      None
    • Severity:
      Normal
    • Impacts:
      Docs

      Description

      The default in 2.2+ was to enable TIMEHORIZON message coalescing. After reports of performance regressions after upgrading from 2.1 to 2.2/3.0 we have discovered the issue to be this default.

      We need to re-test our assumptions on this feature but in the meantime we should default back to disabled.

      Here is a performance run with and without message coalescing

        Attachments

        1. 12676.diff
          1 kB
          Jeff Jirsa
        2. coalescing_disabled.png
          198 kB
          Jay Zhuang
        3. result.html
          1.43 MB
          Jay Zhuang

          Activity

            People

            • Assignee:
              jjirsa Jeff Jirsa
              Reporter:
              tjake T Jake Luciani
              Authors:
              Jeff Jirsa
              Reviewers:
              T Jake Luciani
            • Votes:
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              Watchers:
              18 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: