Question about enabling Automatic Shared Memory Management

Platform is Oracle 10.
 
I thought that  ASMM was enabled by setting sga_target to a non-zero
value.
 
But I recently read the notes below, which confused me.
 
Do I really need to set shared_pool_size to a non-zero value? I thought
the whole point of ASMM was that oracle calculated shared_pool_size?
 
 
Oracle Automatic Shared Memory Management is enabled by setting:

*       You must use an spfile for the init.ora values

*       sga_target parameter is set to a non-zero value

*       statistics_level parameter set to to TYPICAL (the default) or
ALL

*       shared_pool_size must be set to a non-zero value

 
John Dunn

Product Consultant

Sefas Innovation Limited

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