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From "Wilbur Yang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-7975) HS2 memory optimization: Internalizing instance fields of Thrift-generated metastore API classes
Date Thu, 04 Sep 2014 01:49:52 GMT
Wilbur Yang created HIVE-7975:
---------------------------------

             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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