V$SGA_DYNAMIC_COMPONENTS

SGA resize operations since last startup.

Columns
   ___________________________
 
   COMPONENT
   CURRENT_SIZE
   MIN_SIZE
   MAX_SIZE
   OPER_COUNT
   LAST_OPER_TYPE
   LAST_OPER_MODE
   LAST_OPER_TIME
   GRANULE_SIZE

Related:

V$SGA