You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@spark.apache.org by "xuanzhiang (Jira)" <ji...@apache.org> on 2023/02/13 11:15:00 UTC

[jira] [Updated] (SPARK-42227) Use approx_percentile function running slower in spark3 than spark2

     [ https://issues.apache.org/jira/browse/SPARK-42227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

xuanzhiang updated SPARK-42227:
-------------------------------
    Attachment: percentile_approx+objectHashAggregateExec_shuffle_task.png
                percentile+objectHashAggregateExec_shuffle_task.png

> Use approx_percentile function running slower in spark3 than spark2
> -------------------------------------------------------------------
>
>                 Key: SPARK-42227
>                 URL: https://issues.apache.org/jira/browse/SPARK-42227
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.2.1
>            Reporter: xuanzhiang
>            Priority: Major
>         Attachments: percentile+objectHashAggregateExec.png, percentile+objectHashAggregateExec_shuffle_task.png, percentile_approx+objectHashAggregateExec.png, percentile_approx+objectHashAggregateExec_shuffle_task.png
>
>
> approx_percentile(end_ts-start_ts,0.9) cost_p90
> in spark3 , it use objectHashAggregate method , but it shuffle very slow. when i use percentile , it become fast. i dont know the reson, i think approx_percentile should fast.



--
This message was sent by Atlassian Jira
(v8.20.10#820010)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org