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https://issues.apache.org/jira/browse/HADOOP-4959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12660114#action_12660114
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Eric Yang commented on HADOOP-4959:
-----------------------------------
ganglia metrics library and dstat were suggested for this purpose. However,
there are other type of problems, like precision lost in float in ganglia
metrics library. dstat is also GPLed. Replacing system metrics measurements
with a third party tool should be another bug on it's own.
> System metrics does not output correctly for Redhat 5.1.
> --------------------------------------------------------
>
> Key: HADOOP-4959
> URL: https://issues.apache.org/jira/browse/HADOOP-4959
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/chukwa
> Environment: Redhat EL 5.1, Java 6
> Reporter: Eric Yang
> Assignee: Eric Yang
> Attachments: HADOOP-4959.patch
>
>
> Top output is different between Redhat 4.5 and Redhat 5.1. The demux parser
> needs to be updated to parse information correctly.
> From Redhat EL 4.5:
> 008-12-23 00:00:33,983 INFO
> org.apache.hadoop.chukwa.inputtools.plugin.metrics.Exec: top - 00:00:33 up
> 291 days, 3:34,
> 0 users, load average: 1.42, 4.47, 4.97^D
> Tasks: 184 total, 1 running, 183 sleeping, 0 stopped, 0 zombie^D
> Cpu(s): 6.9% us, 0.8% sy, 0.5% ni, 90.8% id, 0.9% wa, 0.0% hi, 0.2% si^D
> Mem: 3088508k total, 1364972k used, 1723536k free, 68008k buffers^D
> Swap: 16386160k total, 501196k used, 15884964k free, 406344k cached^D
> From Redhat EL 5.1:
> 2008-12-23 00:55:00,242 INFO
> org.apache.hadoop.chukwa.inputtools.plugin.metrics.Exec: top - 00:55:00 up 33
> days, 22:07,
> 2 users, load average: 1.14, 1.17, 1.07^D
> Tasks: 177 total, 1 running, 176 sleeping, 0 stopped, 0 zombie^D
> Cpu(s): 0.3%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si,
> 0.0%st^D
> Mem: 8175232k total, 2027628k used, 6147604k free, 344052k buffers^D
> Swap: 25157664k total, 0k used, 25157664k free, 1248400k cached^D
> Notice in 5.1, there is a % for st.
> The parser needs to be improved.
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