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Posted to dev@hive.apache.org by "Prasanth Jayachandran (JIRA)" <ji...@apache.org> on 2017/11/07 21:34:00 UTC

[jira] [Created] (HIVE-18006) Optimize memory footprint of HLLDenseRegister

Prasanth Jayachandran created HIVE-18006:
--------------------------------------------

             Summary: Optimize memory footprint of HLLDenseRegister
                 Key: HIVE-18006
                 URL: https://issues.apache.org/jira/browse/HIVE-18006
             Project: Hive
          Issue Type: Bug
    Affects Versions: 3.0.0
            Reporter: Prasanth Jayachandran


{code}
private double[] invPow2Register;
{code}
seems to add up memory when caching column stats (#table * #partition * #cols). This register can be pre-computed and stored as constant. 



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