cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
New Member

Incremental Refresh for Dataflow calling Source API Multiple TImes

We have Dataflows that utilize API Sources that we would like to incrementally refresh. These are working as expected since the source filters the data to the latest snapshot data which has a Data Through Date that allows us to detect the period we want to refresh. We are using incremental to support reporting on current and prior period data.

 

The issue we are seeing is that each time the incremental refresh runs, Power BI makes multiple calls to the source API.  While this doesn't present a problem for most of our sources, we have a couple that provide larger result sets and are memory intensive.  Making multiple calls to the source (5-8x within 30 seconds of the refresh starting) uses too much memory and ultimately brings down that API.  

 

When we run full refreshes, the Power BI Service only calls the source once.  

 

A couple of things to note:

  1. The Dataflow has one Entity (The API Source)
  2. There are multiple transformation steps (e.g. taking the JSON Doc, converting it to a table, applying data types, etc.)

 

Any idea why the Source API would be called so many times in rapid succession?

1 REPLY 1
Super User III
Super User III

When you say Incremental Refresh are you referring to the Power BI version (including RangeStart and RangeEnd datetime filters for the data source, and Power BI's partition management), or something that you have created manually in your query?

Helpful resources

Announcements
secondImage

Congratulations!

We are excited to announce the Power BI Super Users!

Wave Release 2

Check out the updates in Power BI.

Overview of Power BI 2020 release wave 2!

Microsoft Ignite

Microsoft Ignite

Join digitally, March 2–4, 2021 to explore new tech that's ready to implement. Experience the keynote in mixed reality through AltspaceVR!

secondImage

The largest Power BI virtual conference

100+ sessions, 100+ speakers, Product managers, MVPs, and experts. All about Power BI. Attend online or watch the recordings.

Top Solution Authors
Top Kudoed Authors