Hi Aparna

Are you asking about the size of the database that BRMS uses or the server instance itself? And are you talking about the memory (RAM) or storage space required? I don't think we have any standard information, every set up is different so I would suggest opening up a support case for this query as more than likely we will need some particulars from yourself regarding your specific environment.

The only thing I was able to find after a quick search on the docs was [1].

Regards

Mustafa

[1] https://access.redhat.com/site/documentation/en-US/JBoss_Enterprise_BRMS_Platform/5/html-single/BRMS_Administrator_Guide/index.html#chap-Data_Management