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https://issues.apache.org/jira/browse/HIVE-14901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15553034#comment-15553034
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Sergey Shelukhin commented on HIVE-14901:
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We don't even really use the config in all cases, see HIVE-14876.
> HiveServer2: Use user supplied fetch size to determine #rows serialized in
> tasks
> --------------------------------------------------------------------------------
>
> Key: HIVE-14901
> URL: https://issues.apache.org/jira/browse/HIVE-14901
> Project: Hive
> Issue Type: Sub-task
> Components: HiveServer2, JDBC, ODBC
> Affects Versions: 2.1.0
> Reporter: Vaibhav Gumashta
>
> Currently, we use {{hive.server2.thrift.resultset.max.fetch.size}} to decide
> the max number of rows that we write in tasks. However, we should ideally use
> the user supplied value (which can be extracted from the
> ThriftCLIService.FetchResults' request parameter) to decide how many rows to
> serialize in a blob in the tasks. We should however use
> {{hive.server2.thrift.resultset.max.fetch.size}} to have an upper bound on
> it, so that we don't go OOM in tasks and HS2.
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