Shohei Okumiya created HIVE-28549:
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Summary: Limit the maximum number of operators merged by
SharedWorkOptimizer
Key: HIVE-28549
URL: https://issues.apache.org/jira/browse/HIVE-28549
Project: Hive
Issue Type: Sub-task
Components: Physical Optimizer
Affects Versions: 4.0.0
Reporter: Shohei Okumiya
Assignee: Shohei Okumiya
Currently, SharedWorkOptimizer can merge as many number of operator trees as
possible. This unbounded optimization can push memory pressure to a task, or
can cause performance problems because a single vertex has to process many
operations.
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