hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Gopal V (JIRA)" <>
Subject [jira] [Created] (HIVE-10191) ORC: Cleanup writer per-row synchronization
Date Thu, 02 Apr 2015 07:14:53 GMT
Gopal V created HIVE-10191:

             Summary: ORC: Cleanup writer per-row synchronization
                 Key: HIVE-10191
             Project: Hive
          Issue Type: Bug
          Components: File Formats
    Affects Versions: 1.2.0
            Reporter: Gopal V
            Assignee: Gopal V

ORC writers were originally meant to be thread-safe, but in the present day implementation
each ORC writer is entirely share-nothing which converts most of the synchronized blocks in
ORC as entirely uncontested locks.

These uncontested locks prevent the JVM from inlining/optimizing these methods, while adding
no extra thread-safety to the ORC writers.

This message was sent by Atlassian JIRA

View raw message