List Session Waits for RAC

SET PAGESIZE 300
SET LINESIZE 300

COLUMN inst_id FORMAT 99
COLUMN username FORMAT A20
COLUMN sid FORMAT 9999
COLUMN serial# FORMAT 99999
COLUMN event FORMAT A48
COLUMN wait_class FORMAT A15

SELECT s.inst_id,
       NVL(s.username, '(oracle)') AS username,
       s.sid,
       s.serial#,
       sw.event,
       sw.wait_class,
       sw.wait_time,
       sw.seconds_in_wait,
       sw.state
FROM   gv$session_wait sw,
       gv$session s
WHERE  s.sid     = sw.sid
AND    s.inst_id = sw.inst_id
ORDER BY sw.seconds_in_wait DESC;