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Posted to dev@hive.apache.org by "Wilbur Yang (JIRA)" <ji...@apache.org> on 2014/09/04 03:49:52 UTC

[jira] [Created] (HIVE-7975) HS2 memory optimization: Internalizing instance fields of Thrift-generated metastore API classes

Wilbur Yang created HIVE-7975:
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             Summary: HS2 memory optimization: Internalizing instance fields of Thrift-generated metastore API classes
                 Key: HIVE-7975
                 URL: https://issues.apache.org/jira/browse/HIVE-7975
             Project: Hive
          Issue Type: Improvement
            Reporter: Wilbur Yang
            Assignee: Wilbur Yang
             Fix For: 0.14.0


We should internalize the String-based instance fields of the metastore API classes FieldSchema, Partition, SerDeInfo, and StorageDescriptor in order to save memory. In a test environment with data consisting of about 1800 partitions, the proposed changes are able to save about 24% of old generation memory during a complex query. See details in the attached document.



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