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 "Christian Kunz (JIRA)" <ji...@apache.org> on 2007/07/07 00:01:11 UTC

[jira] Commented: (HADOOP-1553) Extensive logging of C++ application can slow down task by an order of magnitude

    [ https://issues.apache.org/jira/browse/HADOOP-1553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12510808 ] 

Christian Kunz commented on HADOOP-1553:
----------------------------------------

Here some additional data:
A certain application with extensive logging for debugging turned on took 5.5 hours, with logging turned off just 3 minutes.
When logging was turned on, the throughput to userlogs was 6kBps, with about 90 log messages per sec.


> 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: pipes
>    Affects Versions: 0.13.0
>            Reporter: Christian Kunz
>
> 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.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.