SELECT
  TXNS_ENQUEUED,                           -- TXNS_ENQUEUED NUMBER
  CALLS_ENQUEUED,                          -- CALLS_ENQUEUED NUMBER
  TXNS_PURGED,                             -- TXNS_PURGED NUMBER
  LAST_ENQUEUE_TIME,                       -- LAST_ENQUEUE_TIME DATE
  LAST_PURGE_TIME                          -- LAST_PURGE_TIME DATE
FROM
  GV$REPLQUEUE
WHERE
  INST_ID = USERENV('Instance')