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https://issues.apache.org/jira/browse/CASSANDRA-1099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brandon Williams updated CASSANDRA-1099:
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Attachment: 1099.txt
Updated patch which comments out the config, which will default the number of
writer threads to the number of data directories.
> make CFS.flushWriter_ size configurable
> ---------------------------------------
>
> Key: CASSANDRA-1099
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1099
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Brandon Williams
> Priority: Minor
> Fix For: 0.7
>
> Attachments: 1099.txt
>
>
> For small heaps (including our out-of-the-box 1G) we want to allow reducing
> this from the automatic (1 + 2 *
> DatabaseDescriptor.getAllDataFileLocations().length); having 3 memtables in
> the queue, plus another being written, is over 200MB which is a significant
> amount of data for the GC to chew through (see CASSANDRA-1014).
> For large heaps, we might also want to allow *increasing* this value, to
> accommodate load spikes better.
> Unfortunately making this configurable at runtime does not appear to be an
> option due to the lack of a setCapacity method on any of the BlockingQueue
> classes.
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