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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1553) Extensive logging of C++ application can slow down task by an order of magnitude
Date Wed, 01 Aug 2007 23:03:53 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1553?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Owen O'Malley updated HADOOP-1553:
----------------------------------

    Status: Open  (was: Patch Available)

It didn't work under windows.

> Extensive logging of C++ application can slow down task by an order of magnitude
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-1553
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1553
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.13.0
>            Reporter: Christian Kunz
>            Assignee: Owen O'Malley
>            Priority: Blocker
>             Fix For: 0.14.0
>
>         Attachments: new-log-2.patch, new-log-3.patch
>
>
> We observed that extensive logging (due to some configuration mistake) of a c++ application
using the pipes interface can slow down the task by an order of magnitude. During that time
disk usage was not high, with no abnormal memory usage, and basically idle CPU.

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