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  1. Hive
  2. HIVE-8188

ExprNodeGenericFuncEvaluator::_evaluate() loads class annotations in a tight loop

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 0.14.0
    • 0.14.0
    • UDF

    Description

      When running a near-constant UDF, most of the CPU is burnt within the VM trying to read the class annotations for every row.

      Attachments

        1. udf-deterministic.png
          106 kB
          Gopal Vijayaraghavan
        2. HIVE-8188.1.patch
          2 kB
          Gopal Vijayaraghavan
        3. HIVE-8188.2.patch
          5 kB
          Gopal Vijayaraghavan

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. HIVE-8313 Optimize evaluation for ExprNodeConstantEvaluator and ExprNodeNullEvaluator

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. HIVE-13021 GenericUDAFEvaluator.isEstimable(agg) always returns false

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

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              gopalv Gopal Vijayaraghavan
              gopalv Gopal Vijayaraghavan
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              Dates

                Created:
                Updated:
                Resolved: