GV$METRICNAME definition in Oracle Database 11.2
GV$METRICNAME

SELECT
  d.inst_id,                               -- INST_ID NUMBER
  d.groupid,                               -- GROUP_ID NUMBER
  g.name,                                  -- GROUP_NAME VARCHAR2(64)
  d.metricid,                              -- METRIC_ID NUMBER
  d.name,                                  -- METRIC_NAME VARCHAR2(64)
  d.unit                                   -- METRIC_UNIT VARCHAR2(64)
FROM
  x$kewmdsm d,
  x$kewmgsm g
where
  d.groupid = g.groupid

home |  up