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https://issues.apache.org/jira/browse/TEZ-3911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16468102#comment-16468102
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TezQA commented on TEZ-3911:
----------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment
  http://issues.apache.org/jira/secure/attachment/12922532/TEZ-3911.007.patch
  against master revision 081a64f.

    {color:green}+1 @author{color}.  The patch does not contain any @author 
tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new 
or modified test files.

      {color:red}-1 javac{color}.  The applied patch generated 27 javac 
compiler warnings (more than the master's current 24 warnings).

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new 
Findbugs (version 3.0.1) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in .

Test results: 
https://builds.apache.org/job/PreCommit-TEZ-Build/2795//testReport/
Javac warnings: 
https://builds.apache.org/job/PreCommit-TEZ-Build/2795//artifact/patchprocess/diffJavacWarnings.txt
Console output: https://builds.apache.org/job/PreCommit-TEZ-Build/2795//console

This message is automatically generated.


> Optional min/max/avg aggr. task counters reported to HistoryLoggingService at 
> final counter aggr.
> -------------------------------------------------------------------------------------------------
>
>                 Key: TEZ-3911
>                 URL: https://issues.apache.org/jira/browse/TEZ-3911
>             Project: Apache Tez
>          Issue Type: New Feature
>            Reporter: Eric Wohlstadter
>            Assignee: Vineet Garg
>            Priority: Critical
>             Fix For: 0.9.next
>
>         Attachments: TEZ-3911.001.patch, TEZ-3911.002.patch, 
> TEZ-3911.003.patch, TEZ-3911.004.patch, TEZ-3911.005.patch, 
> TEZ-3911.006.patch, TEZ-3911.007.patch
>
>
> Consumers of HistoryLoggingService reported counters are currently required 
> to compute any task-level aggregations other than "sum". This is inefficient 
> as Tez is already "scanning" over this data. Computing incremental aggregates 
> shouldn't require additional scans by ATS consumers. 
> Provide an option for Task counter aggregations other than "sum". Computation 
> of these extra counters can be turned on/off.
> The option will generate "synthetic" counters at final aggregation time for 
> reporting to HistoryLoggingService, e.g. MAX_GC_TIME_MILLIS. 
> Only incremental aggregations will be supported (min/max/avg). Aggregation 
> computation will be folded into the existing "aggregation loop" beginning at 
> VertexImpl.incrTaskCounters.
> Extra aggregations will only be supported during final counter aggregation.
> Aggregations will only include the "bestAttempt" for each task.
> A design doc will be provided.
> Because final task aggregation holds a lock, a performance report will be 
> provided. 



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