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Denis_Slav
Helper III
Helper III

How to reduce heavy Index column size

Hello Comunity,

 

I add Index column, and when I analyzing performance with DAX Studio, I found that Index column cost 30% of table size, 

I need Index column, because I split all rows in my rawdata to several rows.

 

Is there any way to reduce this size to increase performance?

2 ACCEPTED SOLUTIONS
Fowmy
Super User
Super User

@Denis_Slav 

Having index columns in your model will create high cardinality, better if you could avoid it. One way you can boost your model and calculation performance is to create summary tables and base your measures on them. Also, try and use the aggregation functionality.

Refer to these articles as well: 
https://docs.microsoft.com/en-us/power-bi/guidance/power-bi-optimization
https://blog.pragmaticworks.com/power-bi-performance-tips-and-techniques

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View solution in original post

Greg_Deckler
Super User
Super User

@Denis_Slav - You can't really help it. Index columns are all unique row values, so column compression is almost useless. This is also why date tables tend to be large consumers of data model space as well.


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View solution in original post

3 REPLIES 3
Greg_Deckler
Super User
Super User

@Denis_Slav - You can't really help it. Index columns are all unique row values, so column compression is almost useless. This is also why date tables tend to be large consumers of data model space as well.


@ me in replies or I'll lose your thread!!!
Instead of a Kudo, please vote for this idea
Become an expert!: Enterprise DNA
External Tools: MSHGQM
YouTube Channel!: Microsoft Hates Greg
Latest book!:
Mastering Power BI 2nd Edition

DAX is easy, CALCULATE makes DAX hard...
Fowmy
Super User
Super User

@Denis_Slav 

Having index columns in your model will create high cardinality, better if you could avoid it. One way you can boost your model and calculation performance is to create summary tables and base your measures on them. Also, try and use the aggregation functionality.

Refer to these articles as well: 
https://docs.microsoft.com/en-us/power-bi/guidance/power-bi-optimization
https://blog.pragmaticworks.com/power-bi-performance-tips-and-techniques

________________________

Did I answer your question? Mark this post as a solution, this will help others!.

Click on the Thumbs-Up icon on the right if you like this reply 🙂

YouTube, LinkedIn

Did I answer your question? Mark my post as a solution! and hit thumbs up


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