Rohini Palaniswamy created PIG-4802:
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Summary: Autoparallelism should estimate less when there is
combiner
Key: PIG-4802
URL: https://issues.apache.org/jira/browse/PIG-4802
Project: Pig
Issue Type: Improvement
Reporter: Rohini Palaniswamy
Assignee: Rohini Palaniswamy
Fix For: 0.16.0
When there is a combiner, it reduces records by a lot. Auto-parallelism
should take that into account.
Also currently we multiply by a factor of 10 if there is any FLATTEN. Users
usually have FLATTEN(group) when the group by key is a compound key and it ends
up estimating high. Only FLATTEN of bag should be considered.
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