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  1. Cassandra
  2. CASSANDRA-16465

Increased Read Latency With Cassandra >= 3.11.7

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    Details

    • Bug Category:
      Degradation - Performance Bug/Regression
    • Severity:
      Normal
    • Complexity:
      Normal
    • Discovered By:
      User Report
    • Platform:
      All
    • Impacts:
      None

      Description

      After upgrading Cassandra from 3.11.3 to 3.11.9, Cassandra read latency 99% increased significantly. Getting back to 3.11.3 immediately fixed the issue.

      I have observed "SStable reads" increases after upgrading to 3.11.9.

      The same behavior was observed by some other users: https://www.mail-archive.com/user@cassandra.apache.org/msg61247.html

      According to Paulo Motta's comment, this behavior may be caused by https://issues.apache.org/jira/browse/CASSANDRA-15690 which was introduced on 3.11.7 and removed an optimization that may cause a correctness issue when there are partition deletions.

        Attachments

        1. image-2021-04-28-02-11-27-298.png
          174 kB
          Nicolai Vest
        2. Screenshot from 2021-04-24 20-50-47.png
          78 kB
          Stefan Miklosovic

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              AhmedElJAMI Ahmed ELJAMI
            • Votes:
              5 Vote for this issue
              Watchers:
              18 Start watching this issue

              Dates

              • Created:
                Updated: