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https://issues.apache.org/jira/browse/SPARK-57471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18089332#comment-18089332
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Craiu Constantin-Tiberiu commented on SPARK-57471:
--------------------------------------------------

[~yadavay] I've attached my verified patch to the issue description if you want 
to use that for inspiration.

> Populate input/output size metrics for JDBC reads and writes
> ------------------------------------------------------------
>
>                 Key: SPARK-57471
>                 URL: https://issues.apache.org/jira/browse/SPARK-57471
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 4.2.0
>            Reporter: Craiu Constantin-Tiberiu
>            Priority: Minor
>         Attachments: estimate-bytes.patch
>
>
> At the moment, only number of records read/written is populated and not 
> bytes. 
> Estimate can be made based on size on Spark side to avoid reporting 0.



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