by Chris Webb | Jul 5, 2026 | Chris Webb
A few months ago I wrote about a rare error – the “Maximum allowable memory allocation” error – that may occur when the physical machine, or node, that a semantic model is running on in the Power BI Service comes under memory pressure. Recently, someone I was working...
by Chris Webb | Jun 28, 2026 | Chris Webb
For as long as I’ve been using Power BI – which has been from the beginning – the advice about which storage mode to choose has been the same: use Import mode unless you have a really, really good reason to use DirectQuery mode and even then you’re probably wrong and...
by Chris Webb | Jun 21, 2026 | Chris Webb
“Extreme DAX” by Michiel Rozema, Madzy Stikkelorum and Henk Vlootman Continuing my series of not-reviews of the latest Power BI-related books (and there are fewer and fewer of them being published) that I receive free copies of, here’s the second edition of a book...
by Chris Webb | Jun 14, 2026 | Chris Webb
Quite a few new Dataflows Gen2 features were released recently without much fanfare, but that doesn’t mean they aren’t important. I will take a look at them all in my next few posts; in this first post I’ll look at the ability to disable V-Order on staged data. As the...
by Chris Webb | Jun 7, 2026 | Chris Webb
To finish off my series of posts on concurrent evaluation in Fabric Dataflows Gen2 (see part 1 and part 2) I decided to do some more realistic tests to see how much parallelism I could get. To do this I uploaded 244 identical Excel files containing almost 542000 rows...
by Chris Webb | May 31, 2026 | Chris Webb
In the first part of this series I showed how the Concurrency setting in a Fabric Dataflows Gen2 can affect refresh performance when there are multiple queries inside the dataflow. In this post I will show how, with Partitioned Compute, this setting can also affect...
