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Posted to issues@kylin.apache.org by "kangkaisen (JIRA)" <ji...@apache.org> on 2016/12/12 03:12:58 UTC

[jira] [Created] (KYLIN-2269) Reduce MR memory usage for global dict

kangkaisen created KYLIN-2269:
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             Summary: Reduce MR memory usage for global dict
                 Key: KYLIN-2269
                 URL: https://issues.apache.org/jira/browse/KYLIN-2269
             Project: Kylin
          Issue Type: Improvement
    Affects Versions: v1.6.0
            Reporter: kangkaisen
            Assignee: kangkaisen


currently, in {{Build Base Cuboid Data}}, if user use the global dict and the global dict size significantly larger the mapper memory size, the {{CachedTreeMap}} will load all values as much as possible and the soft references object will stick around for a while when GC, So which will make the {{Build Base Cuboid Data}}  mapper pause for a long time even could not  finish.



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