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Sam_Jain's avatar
Sam_Jain
Icon for Helper III rankHelper III
2 years ago
Solved

Power BI Dataflow - response too large to return

Hello Community,   I have run into a PowerBI dataflow issue. My source table is in Big Query and is a table that gets updated daily and has data for the last 90 days in a rolling fashion.   What ...
dataflow
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  • lbendlin's avatar
    lbendlin
    2 years ago
    Can't use direct connection to BQ for access reasons

    Challenge that assumption.  Tell them that 650 GB is too much.

     

    If they don't budge, use Incremental Refresh. Start VERY small, with a day or so.  See how many rows you get.  Recommended partition size is around 8 to 20 million rows.

  • lbendlin's avatar
    lbendlin
    2 years ago

    Please explain "import does not work"  - are you getting an error message?

     

    Direct Query on a dataflow = datamart = lipstick on a pig  (Azure SQL db being the lipstick and the dataflow being the pig).  Possible, sure,  but a travesty nevertheless.

     

    You can consider switching the incremental refresh to the dataset instead and to completely remove the dataflow from the equation.

     

    You can consider dataflow Gen2 and store the results as Delta Lake in Fabric.

lbendlin's avatar
lbendlin
Icon for Super User rankSuper User
2 years ago

That looks ok.  How many partitions do you see?

Sam_Jain's avatar
Sam_Jain
Icon for Helper III rankHelper III
2 years ago

I don't know of a direct way to find taht but looking at the refresh history - it looks like it ran everyday for about 10-20 seconds with this being from the last run -  

Do you think the data isn't even making it's way into the dataflow?