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Posted to issues@hive.apache.org by "Eugene Koifman (JIRA)" <ji...@apache.org> on 2016/02/05 19:04:39 UTC

[jira] [Updated] (HIVE-13013) Further Improve concurrency in TxnHandler

     [ https://issues.apache.org/jira/browse/HIVE-13013?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eugene Koifman updated HIVE-13013:
----------------------------------
    Priority: Critical  (was: Major)

> Further Improve concurrency in TxnHandler
> -----------------------------------------
>
>                 Key: HIVE-13013
>                 URL: https://issues.apache.org/jira/browse/HIVE-13013
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore, Transactions
>    Affects Versions: 1.0.0
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>            Priority: Critical
>
> There are still a few operations in TxnHandler that run at Serializable isolation.
> Most or all of them can be dropped to READ_COMMITTED now that we have SELECT ... FOR UPDATE support.  This will reduce number of deadlocks in the DBs.



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