V$DATAGUARD_STATS definition in Oracle Database 11.2
V$DATAGUARD_STATS
select
NAME, -- NAME VARCHAR2(32)
VALUE, -- VALUE VARCHAR2(64)
UNIT, -- UNIT VARCHAR2(30)
TIME_COMPUTED, -- TIME_COMPUTED VARCHAR2(30)
DATUM_TIME -- DATUM_TIME VARCHAR2(30)
FROM
GV$DATAGUARD_STATS
where
inst_id=USERENV('Instance')