OLAPTIME

Question

Hi Gurus,
I am doing performance and tuning of a production query in the production using RSRT tcode. The query contains 24 characterstics in rows and 2 key figures in columns. No user exit , no CKG, RKF. No complex calculations. This query is using 110 seconds OLAPTIME and 11 seconds DBTIME, 64 seconds to read masterdata. I think no need to create aggregate and index because DBTIME is very less. I need to reduce OLAPTIME, what should I do ?.
Thanks
Liza

Answer 1

Yes, an aggregate won't help much if the DB time is the relatively small portion you mention.  OLAP time will be primarily a function of the number of cells need to be populated/accessed after the SQL query sends the data to the OLAP processor.
You can look to see if you really need all the KFs (including hidden KFs) that you have and reduce any Chars in the rows that are not needed.  
I would also look at the Master Data access times, they seem high to me, but perhaps you have lots of rows in the result with many characteristics for which the Text descriptions are needed (which is what this is measuring).  Your OLAP query generates a query(s) against the cubes, and then there are separate SQL queries generated to get the text descriptions for the rows that have been returned.