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Posted to dev@hive.apache.org by "Prasanth Jayachandran (JIRA)" <ji...@apache.org> on 2018/06/12 23:24:00 UTC

[jira] [Created] (HIVE-19875) increase LLAP IO queue size for perf

Prasanth Jayachandran created HIVE-19875:
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             Summary: increase LLAP IO queue size for perf
                 Key: HIVE-19875
                 URL: https://issues.apache.org/jira/browse/HIVE-19875
             Project: Hive
          Issue Type: Bug
    Affects Versions: 3.1.0, 4.0.0
            Reporter: Prasanth Jayachandran
            Assignee: Prasanth Jayachandran


According to [~gopalv] queue limit has perf impact, esp. during hashtable load for mapjoin where in the past IO used to queue up more data for processing to process.
1) Overall the default limit could be adjusted higher.
2) Depending on Decimal64 availability, the weight for decimal columns could be reduced.



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