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https://issues.apache.org/jira/browse/ACCUMULO-24?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13128244#comment-13128244
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Adam Fuchs commented on ACCUMULO-24:
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HBase has a strategy to deal with memory fragmentation in the java heap that
would probably also help here. We ought to consider adopting that strategy, in
addition to the smaller, calculated limit, if people are actually going to use
the non-native maps, even if the total calculated space is under the heap size
limit.
> Improve messaging regarding non-native map memory use
> -----------------------------------------------------
>
> Key: ACCUMULO-24
> URL: https://issues.apache.org/jira/browse/ACCUMULO-24
> Project: Accumulo
> Issue Type: Improvement
> Components: tserver
> Affects Versions: 1.4.0
> Reporter: John Vines
> Assignee: Keith Turner
> Priority: Minor
> Labels: improvement, memory
> Fix For: 1.4.0
>
>
> We should compute a smaller size to use for the non-native in memory map when
> the users settings are too large for the JVM setting. There should be proper
> warning when this takes place.
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