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https://issues.apache.org/jira/browse/CASSANDRA-2178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12995633#comment-12995633
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Jonathan Ellis commented on CASSANDRA-2178:
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Wouldn't setting {core=1, max=flush_writers, queue=SynchronousQueue) be better
since it allows the pool size to adjust as needed?
> Memtable Flush writers doesn't actually flush in parallel
> ---------------------------------------------------------
>
> Key: CASSANDRA-2178
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2178
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.7.2, 0.8
> Reporter: Chris Goffinet
> Assignee: Chris Goffinet
> Priority: Minor
> Fix For: 0.8
>
> Attachments:
> 0001-Set-the-core-min-pool-size-to-memtable_flush_writers.patch
>
>
> The flushWriter JMXEnabledThreadPoolExecutor sets the core pool min to 1, and
> sets the LBQ to DatabaseDescriptor.getFlushWriters(). Increasing
> memtable_flush_writers should allow us to flush more in parallel. The pool
> will not grow until LBQ fills up to DatabaseDescriptor.getFlushWriters().
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