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Posted to dev@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2017/11/07 01:59:00 UTC

[jira] [Created] (HIVE-17994) Vectorization: Serialization bottlenecked on irrelevant hashmap lookup

Gopal V created HIVE-17994:
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             Summary: Vectorization: Serialization bottlenecked on irrelevant hashmap lookup
                 Key: HIVE-17994
                 URL: https://issues.apache.org/jira/browse/HIVE-17994
             Project: Hive
          Issue Type: Bug
            Reporter: Gopal V


On machines with slower NUMA, the hashmap lookup for TypeInfo::getPrimitiveCategory is the slowest part of the vectorized serialization loops. The static object references run hot with the NUMA access speeds penalizing half the threads.

!vec-serialize-hashmap.png!



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