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https://issues.apache.org/jira/browse/SPARK-26222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16719122#comment-16719122
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ASF GitHub Bot commented on SPARK-26222:
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xuanyuanking opened a new pull request #23298: [SPARK-26222][SQL] Track file
listing time
URL: https://github.com/apache/spark/pull/23298
## What changes were proposed in this pull request?
File listing time in scan node's SQL metrics has done and improved in
spark-20136/SPARK-26327. In this pr we use QueryPlanningTracker to track start
and end time of file listing.
## How was this patch tested?
Add test for DataFrameWriter and Non-physical phase below:
- DataFrameReader.load, file listing will be triggered by
DataSource.resolveRelation.
- Analyze rule like FindDataSourceTable.
- Optimization rule like PruneFileSourcePartitions,
OptimizeMetadataOnlyQuery.
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> Scan: track file listing time
> -----------------------------
>
> Key: SPARK-26222
> URL: https://issues.apache.org/jira/browse/SPARK-26222
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Reynold Xin
> Priority: Major
>
> We should track file listing time and add it to the scan node's SQL metric,
> so we have visibility how much is spent in file listing. It'd be useful to
> track not just duration, but also start and end time so we can construct a
> timeline.
> This requires a little bit design to define what file listing time means,
> when we are reading from cache, vs not cache.
>
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