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Posted to commits@cassandra.apache.org by "C. Scott Andreas (JIRA)" <ji...@apache.org> on 2018/11/19 02:25:00 UTC
[jira] [Updated] (CASSANDRA-12029) Use off-heap memtables by
default
[ https://issues.apache.org/jira/browse/CASSANDRA-12029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
C. Scott Andreas updated CASSANDRA-12029:
-----------------------------------------
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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