You are viewing a plain text version of this content. The canonical link for it is here.
Posted to common-dev@hadoop.apache.org by "Chris Douglas (JIRA)" <ji...@apache.org> on 2009/05/04 08:12:30 UTC
[jira] Updated: (HADOOP-5664) Use of ReentrantLock.lock() in
MapOutputBuffer takes up too much cpu time
[ https://issues.apache.org/jira/browse/HADOOP-5664?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chris Douglas updated HADOOP-5664:
----------------------------------
Status: Patch Available (was: Open)
> Use of ReentrantLock.lock() in MapOutputBuffer takes up too much cpu time
> -------------------------------------------------------------------------
>
> Key: HADOOP-5664
> URL: https://issues.apache.org/jira/browse/HADOOP-5664
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.19.1
> Reporter: Bryan Duxbury
> Assignee: Chris Douglas
> Priority: Minor
> Attachments: 5664-0.patch
>
>
> In examining a profile of one of my mappers today, I noticed that the method ReentrantLock.lock() in MapTask$MapOutputBuffer seems to be taking up ~11 seconds out of around 100 seconds total. It seems like 10% is an awfully large amount of time to spend in this lock.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.