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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