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https://issues.apache.org/jira/browse/TEZ-3680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15960331#comment-15960331
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TezQA commented on TEZ-3680:
----------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment
  http://issues.apache.org/jira/secure/attachment/12862431/TEZ-3680.3.patch
  against master revision 04f0c76.

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

    {color:red}-1 tests included{color}.  The patch doesn't appear to include 
any new or modified tests.
                        Please justify why no new tests are needed for this 
patch.
                        Also please list what manual steps were performed to 
verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler 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/2368//testReport/
Console output: https://builds.apache.org/job/PreCommit-TEZ-Build/2368//console

This message is automatically generated.

> Optimizations to UnorderedPartitionedKVWriter
> ---------------------------------------------
>
>                 Key: TEZ-3680
>                 URL: https://issues.apache.org/jira/browse/TEZ-3680
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>         Attachments: profiler.png, TEZ-3680.1.patch, TEZ-3680.2.patch, 
> TEZ-3680.3.patch
>
>
> 1. Consider increasing the number of threads in spill executor. 
> {{TEZ_RUNTIME_UNORDERED_OUTPUT_MAX_PER_BUFFER_SIZE_BYTES}} can be used to 
> configure the buffer size. If smaller buffer sizes are provided, there is a 
> chance of getting frequent spills; currently the spill executor operates in 
> single threaded mode.
> 2. During profiling, things like incrementing the counters, notifying 
> progress came up. This may not be common in regular tez jobs. But in 
> processes like LLAP (hive based), it is possible to get into such situations. 
> I will attach the profiler snapshot showing this. It would be good to 
> update/notify less frequently.
> 3. Optimize mergeAll().



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