Forum Discussion

hansei's avatar
hansei
Helper V
6 years ago

Previews are refreshing automatically

I have a report that gets Excel data from SharePoint folders. There are around 30 files and ultimately around 12 tables ranging from 50-300000 rows. If I choose to do 'Refresh All' from the Power Query Editor, it takes a couple of hours for all of the previews to rebuild.

 

If the Power Query Editor is closed and then re-opened, the previews (are cached I assumed and) simply display from the last refresh. If Power BI Desktop is closed and re-opened, then the Editor is opened, the previews still display from their last refresh. However, if a couple of hours pass and the Editor is opened, all of the files are refreshed again, and I have to wait hours for the previews to complete and to be able to make any query changes.

 

This seems abnormal to me, and I wonder what I can do to prevent having to wait so long.

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