Data model - need to improve app. performance - Qlik Community

Anonymous · ‎2016-05-27

Hi All,

I have large volumes of data in my application and need to improve the performance, response time.
In my data model I have a lot of situations like in point 1. attached file. What do you think about duplicating keys and alliasing to achive situation in point 2. Is there a chance to achive a better response time on my app. ?

santiago_respane · ‎2016-05-30

Hi Sylwester,

it would be easier for us to help you if you can elaborate more or share your app with dummy data.

I think the solution for your problem can be more than one depending on your model, data, etc.

You can start from here, there are some good performance tips:

*** 6 Weeks in to QV Development, 30 Million Records QV Document and Help Needed!!! ****

Let me know if this helps.

Kind regards,

Anonymous · ‎2016-05-31

Hi Santiago,

I know that there are more solutions but I would like to know what you think about simple change like below:

I have a big link table:

Link_Table:

LOAD

KEY_A,

KEY_B,

KEY_C,

..

     Field1,
     Field2,
     Field3,
     ..

RESIDENT Link_Table_Tmp;

And few fact tables like:

Fact_Table1

LOAD

KEY_A,

     Field20,
     Field21,
     ..

RESIDENT Fact_Table1_Tmp;

Fact_Table2

LOAD

KEY_A,

     Field30,
     Field31,
     ..

RESIDENT Fact_Table2_Tmp;

Fact_Table3

LOAD

KEY_A,

     Field40,
     Field41,
     ..

RESIDENT Fact_Table3_Tmp;

And I want to change that into:

Link_Table:

LOAD

KEY_A as KEY_A1,

KEY_A as KEY_A2,

KEY_A as KEY_A3,

KEY_B,

KEY_C,

..

     Field1,
     Field2,
     Field3,
     ..

RESIDENT Link_Table_Tmp;

Fact_Table1

LOAD

KEY_A as KEY_A1,

     Field20,
     Field21,
      ..

RESIDENT Fact_Table1_Tmp;

Fact_Table2

LOAD

KEY_A as KEY_A2,

     Field30,
     Field31,
     ..

RESIDENT Fact_Table2_Tmp;

Fact_Table3

LOAD

KEY_A as KEY_A3,

     Field40,
     Field41,
     ..

RESIDENT Fact_Table3_Tmp;

This is just a simple example of what I want to do.

Thanks

Sylwester

sasiparupudi1 · ‎2016-05-31

If you are using a concatenated key in your table, try changing them to numeric keys using autonumber function.

numeric keys work better on large volumes of data

hth

Sasi

Anonymous · ‎2016-05-31

Yes, I use autonumber() function.

Sylwester

Anonymous · ‎2016-06-02

Any opinion ?