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