planga82 commented on issue #26082: [SPARK-29431][WebUI] Improve Web UI / Sql 
tab visualization with cached dataframes.
URL: https://github.com/apache/spark/pull/26082#issuecomment-546634480
 
 
   Hi @joshrosen-stripe 
   It's very interesting what are you talking about. I have done some tests on 
it. I think the results are coherent but I'm not sure if enough clear.
   First job with cached dataframe (full cached)
   
![image](https://user-images.githubusercontent.com/12819544/67625161-85e9e280-f83a-11e9-8ff7-8e3bc872126d.png)
   Second job using the same cached dataframe
   
![image](https://user-images.githubusercontent.com/12819544/67625166-9e59fd00-f83a-11e9-8b8a-3a26109d0acf.png)
   At the second job thre is no data processed at the cached dataframe.
   First job with partial cached dataframe
   
![image](https://user-images.githubusercontent.com/12819544/67625183-d8c39a00-f83a-11e9-8f39-5754dcad1ae0.png)
   Second job that uses the previous dataframe but need to cache all the 
dataframe.
   
![image](https://user-images.githubusercontent.com/12819544/67625193-07da0b80-f83b-11e9-9630-b601961a9d6c.png)
   For me is enough clear if you know how cached dataframes are. ¿What do you 
think?

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