[jira] [Assigned] (HIVE-20797) Print Number of Locks Acquired

["BELUGA BEHR (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-20797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

BELUGA BEHR reassigned HIVE-20797:
----------------------------------

    Assignee: BELUGA BEHR

> Print Number of Locks Acquired
> ------------------------------
>
>                 Key: HIVE-20797
>                 URL: https://issues.apache.org/jira/browse/HIVE-20797
>             Project: Hive
>          Issue Type: Improvement
>          Components: HiveServer2, Locking
>    Affects Versions: 4.0.0
>            Reporter: BELUGA BEHR
>            Assignee: BELUGA BEHR
>            Priority: Minor
>              Labels: newbie, noob
>
> The number of locks acquired by a query can greatly influence the performance and stability of the system, especially for ZK locks.  Please add INFO level logging with the number of locks each query obtains.
> Log here:
> https://github.com/apache/hive/blob/3963c729fabf90009cb67d277d40fe5913936358/ql/src/java/org/apache/hadoop/hive/ql/Driver.java#L1670-L1672
> {quote}
> A list of acquired locks will be stored in the org.apache.hadoop.hive.ql.Context object and can be retrieved via org.apache.hadoop.hive.ql.Context#getHiveLocks.
> {quote}
> https://github.com/apache/hive/blob/758ff449099065a84c46d63f9418201c8a6731b1/ql/src/java/org/apache/hadoop/hive/ql/lockmgr/HiveTxnManager.java#L115-L127



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