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  1. Cassandra
  2. CASSANDRA-724

Insert/Get Contention

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Normal
    • Resolution: Fixed
    • Fix Version/s: 0.6
    • Component/s: None
    • Labels:
      None
    • Severity:
      Normal

      Description

      We tried out the socket io patch in CASSANDRA-705, tested the latest JVM of b18 for 1.6. Still seeing very strange insert times. We see this with get_slices as well but it's easy to reproduce with batch_insert. I wonder if its related to Memtable contention, it's pretty easy to see the slow times when you restart the test script attached. We are running this on a 7 node cluster, <1% cpu. Consistency Level of 1.

      Results
      ---------------------
      Slow insert test.10882 0.203548192978
      Slow insert test.18005 0.203876972198
      Slow insert test.21154 0.204496860504
      Slow insert test.22054 0.0444049835205
      Slow insert test.26445 0.201545000076

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            • Assignee:
              jbellis Jonathan Ellis
              Reporter:
              lenn0x Chris Goffinet
              Authors:
              Jonathan Ellis
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              Dates

              • Created:
                Updated:
                Resolved: