Forum Discussion
Query loads bigger file then saved on the disk
Hi, jacek_k
It will depend on the number of times a source file (query) is duplicated or referenced and also the number of query transformations. The same file can be loaded multiple times.Usually PQ would load the source data twice: First while retrieving the metadata to generate the evaluation plan and then to fetch the data itself.
You might considering using the M function Table.Buffer Table.Buffer - PowerQuery M | Microsoft Docs This can reduce the number of re-reading the base file.
You can find more performance tips on this blog here: Speed/Performance aspects – The BIccountant
Refer:
Why does Power BI "Load" much more data (volume) than what's in my source file?
XLSX file 10MB, but Power Query loads 100MB into Power Query
Best Regards,
Community Support Team _ Zeon Zheng
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Hi, jacek_k
It will depend on the number of times a source file (query) is duplicated or referenced and also the number of query transformations. The same file can be loaded multiple times.
Usually PQ would load the source data twice: First while retrieving the metadata to generate the evaluation plan and then to fetch the data itself.
You might considering using the M function Table.Buffer Table.Buffer - PowerQuery M | Microsoft Docs This can reduce the number of re-reading the base file.
You can find more performance tips on this blog here: Speed/Performance aspects – The BIccountant
Refer:
Why does Power BI "Load" much more data (volume) than what's in my source file?
XLSX file 10MB, but Power Query loads 100MB into Power Query
Best Regards,
Community Support Team _ Zeon Zheng
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
this is excactly what i needed 🙂
