can i consider giving these values for DB size of >30GB and
5000 trans per day by >30 users (30 x 5000 trans) RAM size of 2-4GB

db_block_size=7000
shared_pool_size=209714200
java_pool_size= 10485600
log_buffer= 1637400
sort_area_size= 2047000
sort_area_retained_size= 1023000