COPA reports - how to improve performance

Hi all,
in our system KE30 reports are running more then 1 hour and the performance is getting worse and worse with the increasing of the database.
What are the possibilities to improve it? Do you have similar problems? Is it normal that one report is running more then 1 and 1/2 hours?
I read about summarization levels and may be it is good to use it. Will the use of summarization levels change anything in the reports?
Thank you,
Maria

HI,
You can define summarization levels based on your requirements by transaction code KEDV,
Define all the Char here at KEDV to improve the performance.
It is always easier to let the system propose the summarization level
and then fine-tune it. Once it is defined, you need to update the new summarization level with program RKETRERU (option Build new levels). Periodically, you also need to update summarization levels
with program RKETRERU (option Update).
With regardss
krishna

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