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residentx
Helper IV
Helper IV

PowerBI Performance Management Best Practices?

I have some peformance questions about PowerBI. These questions related to the global settings:

 

Q1: Why the 4096 limit? Even Excel 32 bit can go higher than this...

Q2: Privacy Level? Does fast combine still exist and is there a way to measure the performance impact?

Q3: Why allow parameterization in data source and transformations dialogs? Will this hurt performance?

Q4: Parallel loading of tables? I've stopped using this because I want each table job to finish before I move on to another.

Has anyone else disabled this? I've disabled this because large datasets would not import completely.

Q5: What restrictions are there now for measures now in directquery mode now? I have not been a huge fan of directquery in practice.

 

1 ACCEPTED SOLUTION
Greg_Deckler
Super User
Super User

A1: To what 4096 limit are you referring, visuals, data cache limit?

 

A2: Fast Combine ignores privacy level: https://powerbi.microsoft.com/en-us/documentation/powerbi-refresh-enable-fast-combine/

 

A3: Because users requested that feature in Ideas, I think their reasoning says it best:

https://ideas.powerbi.com/forums/265200-power-bi-ideas/suggestions/7141377-allow-runtime-parameters-...

https://ideas.powerbi.com/forums/265200-power-bi-ideas/search?oauth_consumer_key=plilavrIh84mco2CxZU...

 

You can turn this off.

 

A4: I have not disabled it and have not seen any issue but it does clearly state that parallel loading can "occasionally degrade performance or reliability"

 

A5: You can turn on unrestricted measures for DirectQuery now.


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3 REPLIES 3
Greg_Deckler
Super User
Super User

A1: To what 4096 limit are you referring, visuals, data cache limit?

 

A2: Fast Combine ignores privacy level: https://powerbi.microsoft.com/en-us/documentation/powerbi-refresh-enable-fast-combine/

 

A3: Because users requested that feature in Ideas, I think their reasoning says it best:

https://ideas.powerbi.com/forums/265200-power-bi-ideas/suggestions/7141377-allow-runtime-parameters-...

https://ideas.powerbi.com/forums/265200-power-bi-ideas/search?oauth_consumer_key=plilavrIh84mco2CxZU...

 

You can turn this off.

 

A4: I have not disabled it and have not seen any issue but it does clearly state that parallel loading can "occasionally degrade performance or reliability"

 

A5: You can turn on unrestricted measures for DirectQuery now.


Follow on LinkedIn
@ 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!:
The Definitive Guide to Power Query (M)

DAX is easy, CALCULATE makes DAX hard...

A1: To what 4096 limit are you referring, visuals, data cache limit? Data Cache

 

A5: You can turn on unrestricted measures for DirectQuery now. I'm not really a fan of tabular or directquery.

 

Thanks for the reply smoupre

Smoupre,

 

Can we talk about this further. The September update is out and I have more questions.

 

  1. Data Load/Data Cache Management -> I thought PowerBI was 64bit why the 32 bit limit(4GB)?

    PowerBI25.png

2. Query Editor/Parameters -> Why always allow parameterization in data source and transformation dialogs?

PowerBI26.png

3. DirectQuery/What is DirectQuery? How can I test/confirm if I have access to this? Should I allow “unrestricted” measure?Security/What is the difference between a new database query and a new native database query?

PowerBI18.png-

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