select
  CLIENT,                                  -- CLIENT VARCHAR2(32)
  READS#,                                  -- READS# NUMBER
  WRITES#,                                 -- WRITES# NUMBER
  KBYTES_READ,                             -- KBYTES_READ NUMBER
  KBYTES_WRITTEN,                          -- KBYTES_WRITTEN NUMBER
  READ_LATENCY,                            -- READ_LATENCY NUMBER
  WRITE_LATENCY                            -- WRITE_LATENCY NUMBER
from
  GV$IOSTAT_NETWORK
where
  inst_id=USERENV('Instance')