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From "Eugene Koifman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-13013) Further Improve concurrency in TxnHandler
Date Fri, 05 Feb 2016 18:04:39 GMT
Eugene Koifman created HIVE-13013:
-------------------------------------

             Summary: 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


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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