Hi Hoa,
Please check this link:
https://help.sap.com/saphelp_nw04/helpdata/en/bf/220c40ac368f5ce10000000a155106/content.htm
"Precalculating and Distributing Queries and Web Templates
You can define broadcast settings for the precalculation and distribution of queries or Web templates. You can also define broadcast settings for the generation of online links for these objects and their distribution. For more information, see Precalculating and Distributing Queries and Web Templates."
Filling the OLAP Cache - Information Broadcasting - SAP Library
When you fill the OLAP cache, you can schedule or even add this job inside a process chain so that after the data load, the cache is filled.
In the following days I will try to add a document on this subject Hoa 
It is something to do with performance Janardhan Sudhir Kumar Chanda.
Regards
Yasemin...