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[SPARK-35311][SS][UI][DOCS] Structured Streaming Web UI state information documentation #32433

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[SPARK-35311][SS][UI][DOCS] Structured Streaming Web UI state information documentation #32433

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[SPARK-35311][SS][UI][DOCS]Structured Streaming Web UI state informat…
gaborgsomogyi May 4, 2021
e99851d
Add missing global watermark + screenshot
gaborgsomogyi May 12, 2021
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Add missing global watermark + screenshot
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@gaborgsomogyi
gaborgsomogyi committed May 12, 2021
commit e99851d8a2d3ea48f1a46ae4cfe67a2f6797953d
Binary file added docs/img/webui-structured-streaming-detail2.png
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2 changes: 2 additions & 0 deletions docs/web-ui.md
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Expand Up @@ -415,6 +415,7 @@ click a "run id" in the tables.

<p style="text-align: center;">
<img src="img/webui-structured-streaming-detail.png" title="Structured Streaming Query Statistics" alt="Structured Streaming Query Statistics">
<img src="img/webui-structured-streaming-detail2.png">
</p>

The statistics page displays some useful metrics for insight into the status of your streaming
Expand All @@ -431,6 +432,7 @@ The tracked operations are listed as follows.
* latestOffset & getOffset: Time taken to query the maximum available offset for this source.
* queryPlanning: Time taken to generates the execution plan.
* walCommit: Time taken to write the offsets to the metadata log.
* **Global Watermark Gap.** The gap between batch timestamp and global watermark for the batch.
* **Aggregated Number Of Total State Rows.** The aggregated number of total state rows.
* **Aggregated Number Of Updated State Rows.** The aggregated number of updated state rows.
* **Aggregated State Memory Used In Bytes.** The aggregated state memory used in bytes.
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