Pando,

I've checked one of our big DB's and if I use the following algoritm for the SGA
SGA = shared_pool_size + large_pool_size + log_buffers + (db_block_size * db_block_buffers) + java_pool_size.

I find 342 Mb of SGA-size. Now I think that this is not all physically needed, but still we have probably 2 of these and the rest of them are smaller.

For me I'ld like to purchase another GB, but offcourse I don't rule the budget... ;-)