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Posted to commits@cassandra.apache.org by "T Jake Luciani (JIRA)" <ji...@apache.org> on 2015/01/16 20:48:34 UTC

[jira] [Created] (CASSANDRA-8639) Can OOM on CL replay with dense mutations

T Jake Luciani created CASSANDRA-8639:
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             Summary: Can OOM on CL replay with dense mutations
                 Key: CASSANDRA-8639
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8639
             Project: Cassandra
          Issue Type: Bug
            Reporter: T Jake Luciani
            Priority: Minor
             Fix For: 2.1.3


If you write dense mutations with many clustering keys, the replay of the CL can quickly overwhelm a node on startup.  This looks to be caused by the fact we only ensure there are 1000 mutations in flight at a time. but those mutations could have thousands of cells in them.

A better approach would be to limit the CL replay to the amount of memory in flight using cell.unsharedHeapSize()



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