[
https://issues.apache.org/jira/browse/MAPREDUCE-1304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12839108#action_12839108
]
Todd Lipcon commented on MAPREDUCE-1304:
----------------------------------------
Two questions:
- I don't know the Task code quite well enough, but will this still be set in
the case that the task fails?
- Is it worth putting this in a separate thread in the Child interface so it
actually gets incremented as the task goes, with each umbilical heartbeat? It
would be nice to see this on a per-task basis when a task appears to be "stuck".
> Add counters for task time spent in GC
> --------------------------------------
>
> Key: MAPREDUCE-1304
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1304
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: task
> Reporter: Todd Lipcon
> Assignee: Aaron Kimball
> Attachments: MAPREDUCE-1304.patch
>
>
> It's easy to grab the number of millis spent in GC (see JvmMetrics for
> example). Exposing these as task counters would be handy - occasionally I've
> seen user jobs where long GC pauses cause big "unexplainable" performance
> problems, and a large counter would make it obvious to the user what's going
> on.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
