If we enable run in separate process in each MA in FIM , it increase memory usage and how about speed and SQL server max memory limit ?

We plan to introduce FIM for galsync.

We set max memory usage of SQL2008 to 4GB.

1

If we enable run in separate process in each MA in FIM ,and run Sync,

 each MA create each process and  increase memory usage rather than run in same process ?

2

how about speed to process synching and what is merit and demerit of run in separate process ?

3

If we enable run in separate process , those processes are out of SQL server max memory limit ?