select
  group_number,                            -- GROUP_NUMBER NUMBER
  user_number,                             -- USER_NUMBER NUMBER
  compound_index,                          -- COMPOUND_INDEX NUMBER
  incarnation,                             -- INCARNATION NUMBER
  os_id,                                   -- OS_ID VARCHAR2(128)
  os_name                                  -- OS_NAME VARCHAR2(64)
from
  gv$asm_user
where
  inst_id = USERENV('Instance')