Eugene Koifman created HIVE-17744:
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             Summary: Acid LockManager optimization
                 Key: HIVE-17744
                 URL: https://issues.apache.org/jira/browse/HIVE-17744
             Project: Hive
          Issue Type: Bug
          Components: Transactions
            Reporter: Eugene Koifman
            Assignee: Eugene Koifman


does it make sense to periodically compute and store min(lock_id) of a 
Write/semi shared lock to know that all earlier locks are Read locks and thus 
don't need to be even retrieved from storage to check if a new Read/semi shared 
lock can be granted?



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