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From "Eugene Koifman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-17710) LockManager and External tables
Date Mon, 16 Oct 2017 20:26:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-17710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16206547#comment-16206547
] 

Eugene Koifman commented on HIVE-17710:
---------------------------------------

Also consider closing an implicit txn immediately after compiling if we know it only uses
External tables.

Somewhat orthogonal, maybe useful to have ReadOnly txn mode - this could simplify TxnHandler.commitTxn()

> LockManager and External tables
> -------------------------------
>
>                 Key: HIVE-17710
>                 URL: https://issues.apache.org/jira/browse/HIVE-17710
>             Project: Hive
>          Issue Type: New Feature
>          Components: Transactions
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>
> should the LM take locks on External tables?  Out of the box Acid LM is being conservative
which can cause throughput issues.
> A better strategy may be to exclude External tables but enable explicit "lock table/partition
<lock mode>" command (only on external tables?).



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