Recalculation of Data

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ParisHilton
Posts: 73
Joined: Fri Apr 23, 2010 11:35 am
OLAP Product: Tm1
Version: 9.5
Excel Version: 2007 2010

Recalculation of Data

Post by ParisHilton »

Hi forum,
we use our cubes for BI reporting, typically loaded with data overnight and queried through the day, with no new data going in.

What I am finding (looking at process monitor) is that if I run a query (Via BI report) there is a lot of processor usage. This I can understand the first time I run a report. But if I run the same report again (no parameter changes), I'd expect my cube to get it's results from RAM and barely touch the CPU.

Might I have set up something by accident that is forcing recalculation? I've got skipcheck and feeders in there, not that I suspect that would cause a problem

Cheers
ps - I doubt it makes any difference, but I recently reorderd dimensions, putting my measures dimension first, which cut the cube to about a quarter of it's size and drastically improved performance. Fairly sure this is unrelated, but possibly points to corruption or something nasty!
“The way I see it, you should live everyday like its your birthday”


TM1 9.5 Cognos BI 8.4 Excel 2007. 128GB Ram. E7450@2.40Ghz -24 core. Fluffy white dog.
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stephen waters
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Joined: Mon Jun 30, 2008 12:59 pm
OLAP Product: TM1
Version: 10_2_2
Excel Version: Excel 2010

Re: Recalculation of Data

Post by stephen waters »

ParisHilton wrote: typically loaded with data overnight and queried through the day, with no new data going in.
Couple fo questions,
- You say "typically" loaded overnight. Do you have ANY changes going on during the day because this will cause the complete calculation cache of input and dependent cubes to be flushed
- When you say you are running the same BI report, is it accessing the same data within TM1 or is it the same format BI report ( eg P&L) but looking at different costs centres\regions?
ParisHilton
Posts: 73
Joined: Fri Apr 23, 2010 11:35 am
OLAP Product: Tm1
Version: 9.5
Excel Version: 2007 2010

Re: Recalculation of Data

Post by ParisHilton »

Poorly written post, there are two loads that happen during the day. But my testing occurs after both these loads have happened, so data is consistent.
It's EXACTLY the same BI report returning the same data.

I like your troubleshooting style.
“The way I see it, you should live everyday like its your birthday”


TM1 9.5 Cognos BI 8.4 Excel 2007. 128GB Ram. E7450@2.40Ghz -24 core. Fluffy white dog.
Catherine
Posts: 110
Joined: Wed May 20, 2009 7:30 am
OLAP Product: TM1
Version: 10.2.2 - PA
Excel Version: 2010
Location: Rennes, France

Re: Recalculation of Data

Post by Catherine »

Try to play with VMM parameter in the }CubeProperties cube.
I once had the same problem as you and it solved it.
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