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https://issues.apache.org/jira/browse/TEZ-2119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17042668#comment-17042668
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László Bodor commented on TEZ-2119:
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[~rohini]: thanks for the inputs, you're right, basically TOTAL_USED_CONTAINERS
is strongly correlated to TOTAL_LAUNCHED_TASKS, the only difference is that
TOTAL_LAUNCHED_TASKS is incremented as a result of an event from task runner
container, but TOTAL_USED_CONTAINER is incremented directly in AM when it
detects a task allocation...I agree that, under normal circumstances, they
don't bring any useful different meaning from each other, I'm will remove it
from next patches
> Counter for launched containers
> -------------------------------
>
> Key: TEZ-2119
> URL: https://issues.apache.org/jira/browse/TEZ-2119
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Rohini Palaniswamy
> Assignee: László Bodor
> Priority: Major
> Attachments: TEZ-2119.01.patch
>
>
> org.apache.tez.common.counters.DAGCounter
> NUM_SUCCEEDED_TASKS=32976
> TOTAL_LAUNCHED_TASKS=32976
> OTHER_LOCAL_TASKS=2
> DATA_LOCAL_TASKS=9147
> RACK_LOCAL_TASKS=23761
> It would be very nice to have TOTAL_LAUNCHED_CONTAINERS counter added to
> this. The difference between TOTAL_LAUNCHED_CONTAINERS and
> TOTAL_LAUNCHED_TASKS should make it easy to see how much container reuse is
> happening. It is very hard to find out now.
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