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IBM Cognos 8 Platform => COGNOS 8 => Analysis Studio => Topic started by: daniele2076 on 20 Apr 2010 11:26:25 AM

Title: Cognos Analysis Studio vs SSAS2005
Post by: daniele2076 on 20 Apr 2010 11:26:25 AM
Hello everybody,
has anyone ever experienced performance degradation using suppress options?

My analysis are ok but, when i suppress Zero/Null on rows/columns my i have to wait several minutes.

thank u,
gm

env:
Cognos Analysis Studio 8.4
MS Analysis Server 2005
Title: Re: Cognos Analysis Studio vs SSAS2005
Post by: CognosPaul on 20 Apr 2010 01:53:33 PM
I've seen this behaviour. I believe Cognos null/zero suppression pulls all of the members of each level, nests them appropriately and then removes the rows. This is inefficient, try instead to filter each level > 0. This will remove the rows before the suppression, thus making it faster.

Also, in order for AS to work they used a lot of crazy expressions. In my experience it's both easier and faster to simply build the report in RS.
Title: Re: Cognos Analysis Studio vs SSAS2005
Post by: daniele2076 on 21 Apr 2010 05:10:24 AM
It seems faster but...
is there a way to put a "general filter"? When i do analysis i have to edit e reapply my filter anytime to match the current layout (rows/columns)

thank u,
gm