automatic memory management

Hi all,

we set initialization parameter (MEMORY_TARGET) and a maximum memory size initialization parameter (MEMORY_MAX_TARGET) to have Automatic memory management.

Do we need also to set the <a name="sthref358"></a>SGA_TARGET initialization parameter to a nonzero value to use Automatic Shared Memory Management ?

Or

just the first (MEMORY_TARGET) is enough to have Automatic Shared Memory Management ?

Thank you.