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https://issues.apache.org/jira/browse/CASSANDRA-12029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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C. Scott Andreas updated CASSANDRA-12029:
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Component/s: Configuration
> Use off-heap memtables by default
> ---------------------------------
>
> Key: CASSANDRA-12029
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12029
> Project: Cassandra
> Issue Type: Improvement
> Components: Configuration
> Reporter: Robert Stupp
> Priority: Minor
>
> A memtable configuration for 0mb on-heap and >0 mb off-heap is currently
> rejected.
> I'm not fully sure whether this is intentional, but making the memtable
> completely off-heap could reduce heap usage and GC pressure using a
> configuration like this:
> {code}
> memtable_heap_space_in_mb: 0
> memtable_offheap_space_in_mb: 1024
> memtable_allocation_type: offheap_objects
> {code}
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