[jira] [Commented] (HIVE-21785) Add task queue/runtime stats per LLAP daemon to output

["Oliver Draese (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-21785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16856043#comment-16856043 ] 

Oliver Draese commented on HIVE-21785:
--------------------------------------

re - added (same) patch to trigger test run again.

test errors were unrelated.

> Add task queue/runtime stats per LLAP daemon to output
> ------------------------------------------------------
>
>                 Key: HIVE-21785
>                 URL: https://issues.apache.org/jira/browse/HIVE-21785
>             Project: Hive
>          Issue Type: Improvement
>          Components: llap
>    Affects Versions: 3.1.1
>            Reporter: Oliver Draese
>            Assignee: Oliver Draese
>            Priority: Major
>             Fix For: 3.1.1
>
>         Attachments: HIVE-21785.1.patch, HIVE-21785.2.patch, HIVE-21785.patch
>
>
> There are several scenarios, where we want to investigate if a particular LLAP daemon is performing faster or slower than the others in the cluster. In these scenarios, it is specifically important to figure out if tasks spent significant time, waiting for an available executor (queued) vs. on the execution itself. Also, a skew in task-to-daemon assignment is interesting.
> This patch adds these statistics to the TezCounters and therefore to the job output on a per LLAP daemon base. Here is an example.
> {{INFO : LlapTaskRuntimeAgg by daemon:}}
> {{INFO :    Count-host-1.example.com: 41}}
> {{INFO :    Count-host-2.example.com: 39}}
> {{INFO :    Count-host-3.example.com: 45}}
> {{INFO :    QueueTime-host-1.example.com: 51437776}}
> {{INFO :    QueueTime-host-2.example.com: 35758306}}
> {{INFO :    QueueTime-host-3.example.com: 47168327}}
> {{INFO :    RunTime-host-1.example.com: 165151539295}}
> {{INFO :    RunTime-host-2.example.com: 141729193528}}
> {{INFO :    RunTime-host-3.example.com: 166876988771}}
> The "Count-" are simple task counts for the appended host name (LLAP daemon)
> The "QueueTime-" values tell, how long tasks waited in the TaskExecutorService's queue before getting actually executed.
> The "RunTime-" values cover the time from execution start to finish (where finish can either be successful execution or a killed/failed execution).
> For the new counts to appear in the output, both - the preexisting hive.tez.exec.print.summary and the new hive.llap.task.time.print.summary have to be set to true.
>  
> {{<property>}}
> {{  <name>hive.tez.exec.print.summary</name>}}
> {{  <value>true</value>}}
> {{</property>}}
> {{<property>}}
> {{  <name>hive.llap.task.time.print.summary</name>}}
> {{  <value>true</value>}}
> {{</property>}}



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