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  1. Cassandra
  2. CASSANDRA-6079

Memtables flush is delayed when having a lot of batchlog activity, making node OOM

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Fix Version/s: 1.2.11, 2.0.2
    • Component/s: None
    • Labels:
      None

      Description

      Both MeteredFlusher and BatchlogManager share the same OptionalTasks thread. So, when batchlog manager processes its tasks no flushes can occur. Even more, batchlog manager waits for batchlog CF compaction to finish.

      On a lot of batchlog activity this prevents memtables from flush for a long time, making the node OOM.

      Fixed this by moving batchlog to its own thread and not waiting for batchlog compaction to finish.

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            • Assignee:
              m0nstermind Oleg Anastasyev
              Reporter:
              m0nstermind Oleg Anastasyev
              Reviewer:
              Jonathan Ellis
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              • Created:
                Updated:
                Resolved: