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https://issues.apache.org/jira/browse/HIVE-19213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16438235#comment-16438235
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Gopal V commented on HIVE-19213:
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This turned out to be related to metadata optimizer than the query-cache.
> Values query: Stop opening transactions on _dummy_table
> -------------------------------------------------------
>
> Key: HIVE-19213
> URL: https://issues.apache.org/jira/browse/HIVE-19213
> Project: Hive
> Issue Type: Bug
> Reporter: Gopal V
> Priority: Major
>
> When the -query-cache is hit- query is a values clause, the ACID TxnManager
> opens a txn + lock + heartbeats on _dummy_database._dummy_table.
> This is blocking values clause from jumping through the fast-paths for
> transactions.
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