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https://issues.apache.org/jira/browse/HBASE-4978?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Purtell resolved HBASE-4978.
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Resolution: Not A Problem
> Reduce offheap cache percentage in direct memory
> ------------------------------------------------
>
> Key: HBASE-4978
> URL: https://issues.apache.org/jira/browse/HBASE-4978
> Project: HBase
> Issue Type: Task
> Reporter: Ted Yu
>
> Currently if -XX:MaxDirectMemorySize is given as JVM parameter, off heap
> cache would consume 95% of it.
> We should leave enough room in direct memory for NIO.
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