SGA_MAX_SIZE

SGA_MAX_SIZE specifies the maximum size of the SGA for the lifetime of the instance. This parameter sets the upper limit for SGA_TARGET. If Automatic Memory Management is enabled, the Oracle database cannot increase the total size of SGA components beyond SGA_MAX_SIZE.

Suggested setting: Use the default setting if Automatic Memory Management is enabled; otherwise refer to How to Determine Memory Settings for Oracle Database Release 11g.