Jason Lowe created MAPREDUCE-4804:
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Summary: Counters for the applicationmaster
Key: MAPREDUCE-4804
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4804
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: applicationmaster
Affects Versions: 0.23.5
Reporter: Jason Lowe
We should provide counters for the AM itself to track interesting items such as
time spent garbage collecting, cpu time spent, etc. Currently there are no
counters specifically for the AM, so it's difficult to tell if the AM is
running very low on heap space, spending a lot of time thrashing in garbage
collecting, and slowing down the job in general.
There are some details to work out on how these counters are tracked within the
job. Should they be top-level job counters, or instead should they be treated
like a separate task type and therefore rolled into the corresponding
collection of GC and CPU counters for all tasks at the job level?
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