[jira] [Work started] (MAPREDUCE-7025) Avg and Max of memory could be record in TaskCount

["Lantao Jin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-7025?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on MAPREDUCE-7025 started by Lantao Jin.
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> Avg and Max of memory could be record in TaskCount
> --------------------------------------------------
>
>                 Key: MAPREDUCE-7025
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7025
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Lantao Jin
>            Assignee: Lantao Jin
>
> MapReduce Counter is very helpful tool to do statistics, analysis and tuning in industry. One popular way is analysing job historical status of running to optimise continuously. But when the job completed, the memory usage in counter is a snapshot value {{PHYSICAL_MEMORY_BYTES}}. So if we can also record the average value and the max value instead of only the last snapshot value, it could be much helpful.
> If you think it' ok. I will contribute the code.



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