GV$SGA_DYNAMIC_COMPONENTS definition in Oracle Database 11.2
GV$SGA_DYNAMIC_COMPONENTS
select
st.inst_id, -- INST_ID NUMBER
st.component, -- COMPONENT VARCHAR2(64)
st.cursize * st.gransize, -- CURRENT_SIZE NUMBER
st.minsize * st.gransize, -- MIN_SIZE NUMBER
st.maxsize * st.gransize, -- MAX_SIZE NUMBER
st.usersize * st.gransize, -- USER_SPECIFIED_SIZE NUMBER
st.opercnt, -- OPER_COUNT NUMBER
decode( -- LAST_OPER_TYPE VARCHAR2(13)
st.lastoper, 0, 'STATIC', 1, 'INITIALIZING', 2, 'DISABLED', 3, 'GROW', 4, 'SHRINK', 5, 'SHRINK_CANCEL', NULL),
decode( -- LAST_OPER_MODE VARCHAR2(9)
st.lastmode, 1, 'MANUAL', 2, 'DEFERRED', 3, 'IMMEDIATE', NULL),
st.lasttime, -- LAST_OPER_TIME DATE
st.gransize -- GRANULE_SIZE NUMBER
from
x$kmgsct st
where
(st.component != 'SGA Target') and (st.component != 'PGA Target')