V$MEMORY_DYNAMIC_COMPONENTS definition in Oracle Database 11.2
V$MEMORY_DYNAMIC_COMPONENTS
select
component, -- COMPONENT VARCHAR2(64)
current_size, -- CURRENT_SIZE NUMBER
min_size, -- MIN_SIZE NUMBER
max_size, -- MAX_SIZE NUMBER
user_specified_size, -- USER_SPECIFIED_SIZE NUMBER
oper_count, -- OPER_COUNT NUMBER
last_oper_type, -- LAST_OPER_TYPE VARCHAR2(13)
last_oper_mode, -- LAST_OPER_MODE VARCHAR2(9)
last_oper_time, -- LAST_OPER_TIME DATE
granule_size -- GRANULE_SIZE NUMBER
from
gv$memory_dynamic_components
where
inst_id = USERENV('Instance')