BELUGA BEHR created HIVE-20797:
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Summary: 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
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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