Dynamically allocate and measure memory usage when a map join op followed by a
group by op
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Key: HIVE-1832
URL: https://issues.apache.org/jira/browse/HIVE-1832
Project: Hive
Issue Type: Improvement
Components: Query Processor
Reporter: Liyin Tang
Assignee: Liyin Tang
Right now, if a map join operator followed by a map-side group by, this map
reduce task will be memory intensive task.
Memory usage should be carefully measured and bounded in order not to run out
of memory.
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