Aggregates in Production System and Change Run Hierarchy

Hi All,
Can anybody tell me, Why should we create Aggregates in Production System nd How?
What is Change Run Hierarchy nd How to perform this?
Reply back me to [email protected]
Regards,
Kiran

Hi Kiran,
Aggregates are nothing but a subset of your Infocube... when a query is executed, it firstl looks for the presence of the data in your aggregates and if found then it fetches the reocrds from there itself.. Else not, it'll search teh entire infocube and then fetch the records which is at a high risk of time consumption and the performance of the Query execution slows down or becomes worse significantly.. for this purpose, you build aggregates.. how do you decide whether you should go for aggregates or not is based on the following criteria...
if the %Data Base time is > 30% and if the KPI ratio (selected to transferred records) is > 10, then you go for the aggregates... you can get these details in the ST03N transaction by choosing Expert mode and selecting BI Workload... you can find all the statistics related to the Query execution starting from the front end time to db time/...
thats all about your aggregates...
Attribute or Hierarchy change run is done so that any changes to your Master data Attributes will have to get effected in terms of your reporting...
say for eg.. ur name is XYZ and loc is in India.. this is how it'll be reflected in your reporting also.. but at a later point in time, if you have changed your location from India to Europe, then for that to be reflected in your reporting, you'll have to perform an Attribute change run for that Characteristic...
Hope it solves your issue..
Regards
Manick

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