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https://issues.apache.org/jira/browse/FLINK-28117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17556214#comment-17556214
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Martijn Visser commented on FLINK-28117:
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[~jingge] Why would these metrics only be interesting for FileSource? I also
don't think we should list these as "user requirement". This is one user
providing input, this should be part of a broader discussion imho.
> More metrics for FileSource
> ---------------------------
>
> Key: FLINK-28117
> URL: https://issues.apache.org/jira/browse/FLINK-28117
> Project: Flink
> Issue Type: Improvement
> Components: Connectors / FileSystem, Runtime / Metrics
> Affects Versions: 1.16.0
> Reporter: Jing Ge
> Priority: Major
>
> According to user's requirement[1], following metrics are required:
> 1. No. of splits SplitAssigner is initialized with, number of splits re-added
> back to the SplitAssigner
> 2. Readers created per unit time
> 3. Time taken to create a reader
> 4. Time taken for the Reader to produce a single Row
> 5. Readers closed per unit time
>
> Some further nice-to-have metrics:1. Number of rows emitted by the source per
> unit time
> 2. Time taken by the enumerator to discover the splits
> 3. Total splits discovered
>
> Please check FLIP-33 first and extend it if above mentioned metrics were not
> included in the FLIP.
>
> [1] https://lists.apache.org/thread/t70hhss6d9s65y1vygyytbm6sgl05yrl
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