Forum Discussion
Helper IIIApply Query Changes : Taking too long , like hours or so
Hi Everyone,
My "Apply query changes' is taking far too long. This wasn't the case when I was working on the same dataset (2m rows) of data.
Recently I did some changes and removed some of the steps within the query that required Merged.
And now when I apply changes to it, is taking forever and seem like is stuck at loading a particular query and it wont move beyond it.
Additional Information
I import all my data into PowerBI via Excel and did all the query within PowerBI.
21 Replies
Hi,
If Power BI is taking too long time to load file, follow below steps:
1. Open the excel or any other source of data and remove all empty cells apart from your data.
2. Open Power BI --->File--->Options and Settings--->Options--->Data Load---> Uncheck autodetect new relationships after data is loaded
These two steps helped me a lot to reduce time while loading data.
I am also having problems with the time taken to refresh my queries.
There are 14 queries in my report, and most of them run in a reasonable amount of time. On 4 of the queries I have used the List.RemoveLastN function, and as I go through each of these queries it is on this line of code that the query is taken so long to run.
Has anybody noticed whether it is specific functions that are causing there queries to run slowly.
RookarumbaHi Everyone,
My "Apply query changes' is taking far too long(more than 2 hours). This wasn't the case when I was working on the same dataset (2m rows) of data.
Recently I did some changes and removed some of the steps within the query that required Merged.
And now when I apply changes to it, is taking forever and seem like is stuck at loading a particular query and it wont move beyond it.
Is there anyway to improve the performance of my query?
Additional Information
I import all my data into PowerBI via Excel and did all the query within PowerBI.
v-yuta-msftCommunity Support
Hi Rookarumba,
Query in power query is slower than database. It is not recommended to implement queries on big data frequently in power bi. As a workaround, you can do these operations in database.(e.g.: merge(join), append(union all)).
Regards,
Jimmy Tao
- Rookarumba
Unfortunately, i don't have the luxury of having a database since the files are data dump by another source.
Thus I'm using PQ to work on those data on a Quarterly basis.
The weird thing is, i work on a previous copy and it seem fine, just not sure why this copy doesn't work after i edited some of the M codes
Hi everyone,
In my case, I have a very simple SQL query which should return around 60k rows of data. But it took hours for me to get over the "Apply query changes" page.
I'm connecting to a database via ODBC. I have tried to uncheck the "Auto Date/Time" in the Options > Data Load settings. But it doesn't help that much. Any advice on how to make it faster? Maybe some setup/configuration that I might have missed?
Thanks!
I'm in the same boat.
Trying to pull data out of Filemaker 16 Server via ODBC. A refresh on 1 table of 50k rows takes 2-3 hours ... not acceptable for my client/solution.
Anyone have any suggestions?
melissdMicrosoft Employee
Same thing here. I have a joined query that is taking toolong (>1hr) to retrrive 6.6M.
The same thing here. I confirm the bug exist as of 28-Sep-2018.
We have <10 non live data sources each extracting just ~20 rows from Tabular models my means of DAX. Extracts themselves happens in ~1 minutes in parallel, but union them into common dataset takes 12-15 minutes, while should be few seconds.
Do you know whether bug request was raised for this?
- Rookarumba
laggerok19 , I'm not too sure if this is a bug but is more on how PowerQuery is refreshing the query when some changes are done on it.
As of today, I'm using a method suggested by Ken Puls (I can't remember what is the name now but i can search for it and post it here again) so the queries won't evaluate everytime.Also, I've upgraded my RAMs to 32GB and that reduces the queries timing from hours to 15 mins Max.
If you can, I suggest you update your RAM too :)
- Rookarumba, this happens when you refresh data at the point of time when combined data set is refreshed. Data extracts are quick, but not union operarion. Im not even saying about data transformations.
We have 8 gb RAM to union ～120-150 rows. Completely not applicable performance for application that cost that money.
What is the way suggested? If that it to publish pbx to pbi reporting service and do scheduled refresh, its not our case. SLA mins are 10 min.
asalcedo29Did this got resolved? I'm having a similar situation where I want to reduce the number of rows in a 4M row Dim table using a Fact table (to get only applicable cases). After loading the data, power query takes 2-3 hours to do an inner join!
Any advise appreciated.
Rookarumba
Try the solution in this post: https://community.powerbi.com/t5/Desktop/quot-Apply-Query-Changes-quot-takes-long-time/td-p/247419Paul Zheng _ Community Support Team
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
