Skip to main content
Showing results for 
Search instead for 
Did you mean: 

Find everything you need to get certified on Fabric—skills challenges, live sessions, exam prep, role guidance, and more. Get started

Microsoft Employee
Microsoft Employee

Power BI refresh failure


Yesterday the Power BI refresh failed for my DataSet giving the following Error:

Query execution has exceeded the allowed limits (80DA0003): Query result set has exceeded the internal data size limit 67108864 (E_QUERY_RESULT_SET_TOO_LARGE; see [0]Kusto.Data.Exceptions.KustoServicePartialQueryFailureLimitsExceededException: Query execution has exceeded the allowed limits (80DA0003): Query result set has exceeded the internal data size limit 67108864 (E_QUERY_RESULT_SET_TOO_LARGE; see Timestamp=2021-05-26T00:39:11.3829208Z ClientRequestId=KPBI;b5a70e3b-7a10-4047-bea3-5a64e5b2ab07;8004d86f-ad63-4945-b936-850b62ddf203;660567fa-5a76-4f42-aa4c-ddc220637713 ActivityId=ea1b2bf5-d299-4314-ae0f-771d079f692c ActivityType=PO.OWIN.CallContext ServiceAlias=DAMPERTEST MachineName=KEngine000000 ProcessName=Kusto.WinSvc.Svc ProcessId=12132 ThreadId=13696 AppDomainName=Kusto.WinSvc.Svc.exe ActivityStack=(Activity stack: CRID=KPBI;b5a70e3b-7a10-4047-bea3-5a64e5b2ab07;8004d86f-ad63-4945-b936-850b62ddf203;660567fa-5a76-4f42-aa4c-ddc220637713 ARID=ea1b2bf5-d299-4314-ae0f-771d079f692c > PO.OWIN.CallContext/ea1b2bf5-d299-4314-ae0f-771d079f692c) MonitoredActivityContext=(ActivityType=PO.OWIN.CallContext, Timestamp=2021-05-26T00:38:55.1595120Z, ParentActivityId=ea1b2bf5-d299-4314-ae0f-771d079f692c, TimeSinceStarted=16223.4088 [ms])ErrorCode= ErrorReason= ErrorMessage= DataSource= DatabaseName= ClientRequestId= ActivityId=00000000-0000-0000-0000-000000000000 UnderlyingErrorCode=80DA0003 UnderlyingErrorMessage=Query result set has exceeded the internal data size limit 67108864 (E_QUERY_RESULT_SET_TOO_LARGE; see

The Data source for my Power BI Data Set is Kusto and I think the default limit in Kusto is ~64MB and the size of one my Kusto tables was 94 MB that's why the refresh failed.

These is how I was connecting to my Kusto Data Source:

Source = Kusto.Contents(clusterUri, "YYY"&Environment, null, [MaxRows=10000000, MaxSize=null, NoTruncate=null, AdditionalSetStatements=null]),
XXXX1 = Source{[Name="XXXX"]}[Data],

When I changed the MaxSize to 1GB the refresh worked fine:


Source = Kusto.Contents(clusterUri, "YYY"&Environment, null, [MaxRows=10000000, MaxSize=1000000000, NoTruncate=null, AdditionalSetStatements=null]),
XXXX1 = Source{[Name="XXXX"]}[Data],


My query is, the size of my table was 94 MB for a long time. Why did I see this error just yesterday?

Issue somehow got resolved by changing the MaxSize field but I am not sure I understood the problem correctly. 

Community Support
Community Support

Hi @anubhutani ,


Generally speaking, when the limit set by default is exceeded, some of the exceeded queries will fail and display "Partial query failed".



Your understanding is correct, you can change the size of the default limit by setting truncationmaxsize and truncationmaxrecords to solve the problem of error reporting.



Here is the reference document link: Query limits - Azure Data Explorer | Microsoft Docs

Best Regards,

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Super User
Super User

Hi @anubhutani 


It would appear that the issue was that the initial query was too large when initially running. When you changed your MaxSize, it then make the result set smaller.

Did I answer your question? Mark my post as a solution!

Proud to be a Super User!

Power BI Blog

Helpful resources

July 2024 Power BI Update

Power BI Monthly Update - July 2024

Check out the July 2024 Power BI update to learn about new features.


Fabric Community Update - June 2024

Get the latest Fabric updates from Build 2024, key Skills Challenge voucher deadlines, top blogs, forum posts, and product ideas.