But the point is: If you use the objects frequently, they will already be in the cache. I might think you have more resources than you need (alhtough i might need to know other relevant details like # of concurrent users etc).
@sumit2906
doing alter table <Table Name> cache will not ensure will remain in cache; it just changes the way the blocks are aged out. Checkout:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:253415112676
for details.