V$SERVICEMETRIC definition in Oracle Database 11.2
V$SERVICEMETRIC
SELECT
begin_time, -- BEGIN_TIME DATE
end_time, -- END_TIME DATE
intsize_csec, -- INTSIZE_CSEC NUMBER
group_id, -- GROUP_ID NUMBER
service_name_hash, -- SERVICE_NAME_HASH NUMBER
service_name, -- SERVICE_NAME VARCHAR2(64)
ctmhash, -- CTMHASH NUMBER
elapsedpercall, -- ELAPSEDPERCALL NUMBER
cpupercall, -- CPUPERCALL NUMBER
dbtimepercall, -- DBTIMEPERCALL NUMBER
callspersec, -- CALLSPERSEC NUMBER
dbtimepersec, -- DBTIMEPERSEC NUMBER
goodness, -- GOODNESS NUMBER
delta, -- DELTA NUMBER
flags -- FLAGS NUMBER
FROM
gv$servicemetric
WHERE
inst_id = USERENV('INSTANCE')