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From "Jimmy Xiang" <>
Subject Re: Review Request 30739: HIVE-9574 Lazy computing in HiveBaseFunctionResultList may hurt performance [Spark Branch]
Date Mon, 09 Feb 2015 19:41:30 GMT

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(Updated Feb. 9, 2015, 7:41 p.m.)

Review request for hive, Rui Li and Xuefu Zhang.


Addressed review comments, made the cache thread-safe.

Bugs: HIVE-9574

Repository: hive-git


Result KV cache doesn't use RowContainer any more since it has logic we don't need, which
is some overhead. We don't do lazy computing right away, instead we wait a little till the
cache is close to spill.

Diffs (updated)

  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ 78ab680

  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ 8ead0cb 
  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ 7a09b4d 
  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ e92e299

  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ 070ea4d 
  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ d4ff37c

  ql/src/java/org/apache/hadoop/hive/ql/exec/spark/ 286816b 
  ql/src/test/org/apache/hadoop/hive/ql/exec/spark/ 0df4598 



Unit test, test on cluster


Jimmy Xiang

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