[ https://issues.apache.org/jira/browse/MAPREDUCE-1304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12839115#action_12839115 ]
Todd Lipcon commented on MAPREDUCE-1304: ---------------------------------------- bq. I think something like this should actually go into the TaskReporter itself Seems reasonable enough to me. > 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.