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https://issues.apache.org/jira/browse/SPARK-2099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14123584#comment-14123584
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Andrew Ash commented on SPARK-2099:
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I just gave this a runthrough and most of the metrics above are live-updated
but the GC one isn't. I think because it's not included in
updateAggregateMetrics here:
https://github.com/apache/spark/pull/1056/files#diff-1f32bcb61f51133bd0959a4177a066a5R175
Should I open a new ticket to make GC time live-updated? That's the metric I
was most excited about to see live-updating.
> Report TaskMetrics for running tasks
> ------------------------------------
>
> Key: SPARK-2099
> URL: https://issues.apache.org/jira/browse/SPARK-2099
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.0.0
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Priority: Critical
> Fix For: 1.1.0
>
>
> Spark currently collects a set of helpful task metrics, like shuffle bytes
> written, GC time, and displays them on the app web UI. These are only
> collected and displayed for tasks that have completed. This makes them
> unsuited to perhaps the situation where they would be most useful -
> determining what's going wrong in currently running tasks.
> Reporting metrics progrss for running tasks would probably require adding an
> executor->driver heartbeat that reports metrics for all tasks currently
> running on the executor.
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