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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-4458) lock contention around configuration settings impacts tablet server performance
Date Wed, 14 Sep 2016 23:35:21 GMT
Sean Busbey created ACCUMULO-4458:
-------------------------------------

             Summary: lock contention around configuration settings impacts tablet server
performance
                 Key: ACCUMULO-4458
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4458
             Project: Accumulo
          Issue Type: Bug
          Components: tserver
    Affects Versions: 1.8.0, 1.7.1
            Reporter: Sean Busbey
            Assignee: Sean Busbey
            Priority: Critical
             Fix For: 1.7.3, 1.8.1, 2.0.0


While investigating a pretty severe performance regression comparing YCSB against 1.6 and
1.7, I found a fair bit of lock contention around getting configuration values. This was improved
by ACCUMULO-4388, but various threads eventually all started contending on the configuration
values expected from the site xml files.



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