You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@hbase.apache.org by "Yu Li (JIRA)" <ji...@apache.org> on 2016/03/13 12:05:33 UTC

[jira] [Created] (HBASE-15451) Remove unnecessary wait in MVCC

Yu Li created HBASE-15451:
-----------------------------

             Summary: Remove unnecessary wait in MVCC
                 Key: HBASE-15451
                 URL: https://issues.apache.org/jira/browse/HBASE-15451
             Project: HBase
          Issue Type: Improvement
    Affects Versions: 1.2.0, 2.0.0
            Reporter: Yu Li
            Assignee: Yu Li


Currently the return value of MVCC#complete indicates whether readPoint already advanced over write number of the given WriteEntry:
{code}
return readPoint.get() >= writeEntry.getWriteNumber();
{code}
While in MVCC#checkAndWait we never take usage of this but always call waitForRead which will acquire and release lock on {{readWaiters}} and cause additional context switch. This JIRA will improve this logic and remove the unnecessary wait. 



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)