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https://reviews.apache.org/r/43553/
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Review request for hive.
Bugs: HIVE-13057
https://issues.apache.org/jira/browse/HIVE-13057
Repository: hive-git
Description
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For a partitioned table, each PartitionDesc has a copy of corresponding
TableDesc.
While TableDesc is mutable and hence cannot be interned, it's property values
can be.
For a simple select on a table with 100K partitions, this cut total number of
String instances by ~65%.
Most replicated strings were location, serde, input/output format, column,
types, table name, etc.
Diffs
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ql/src/java/org/apache/hadoop/hive/ql/plan/PartitionDesc.java
b032349b7faf7026928bea90a6ded29eeb2a502c
Diff: https://reviews.apache.org/r/43553/diff/
Testing
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Thanks,
Mohit Sabharwal
