hi tamil,
can u tell why the sga size should be in that ratio to my RAM.
I read in some books that I can give more to SGA and little memory is needed for NT BG processes,I will really appreciate any help.

this is what i read-

for optimal performance,u want to make sure that u'r machine has enough memory to accomodate the entire sga and still have some memory left for OS to perform well.pl reply back asap.it will be a great help.