SELECT /* use_hash(sess,proc,undo,tmp) use_nl(s)*/ distinct
        sess.inst_id,
        sess.sid,
        sess.serial#,
        sess.username,
        substr(osuser,1,10) osuser,
        status,
        sess.process,
        proc.spid,
        sess.machine,
        sess.program,
        regexp_substr(NUMTODSINTERVAL(nvl((SYSDATE-SQL_EXEC_START)*24*60*60,last_call_et), 'SECOND'),'+\d{2} \d{2}:\d{2}:\d{2}') running_sec,
        TEMP_MB, UNDO_MB,
        s.sql_id ,
        TSPS.NAME TSPS,
        decode(sess.action,null,'',sess.action||', ')||replace(s.sql_text,chr(13),' ') sql
FROM
        gv$session sess,
        gv$process proc,
        gv$sql s,
        (select ses_addr as saddr,sum(used_ublk/128) UNDO_MB from v$transaction group by ses_addr) undo,
        (select session_addr as saddr, SESSION_NUM serial#, sum((blocks/128)) TEMP_MB from gv$sort_usage group by  session_addr, SESSION_NUM) tmp,
        (select inst_id,sid,serial#,event,t.name from gv$session ls, sys.file$ f, sys.ts$ t where status='ACTIVE' and ls.p1text in ('file number','file#') and ls.p1=f.file#  and f.ts#=t.ts#) tsps
WHERE sess.inst_id=proc.inst_id (+)  
and   sess.saddr=tmp.saddr (+) and sess.serial#=tmp.serial# (+)
AND   sess.status='ACTIVE' and sess.username is not null
and   sess.sid=tsps.sid (+) and sess.inst_id=tsps.inst_id(+) and sess.serial#=tsps.serial#(+)
AND   sess.paddr=proc.addr (+)
and   sess.sql_id = s.sql_id (+)
and   sess.saddr=undo.saddr (+)
ORDER BY running_sec desc,4,1,2,3
;