Find a session and processid with more memory

SELECT s.username, SUBSTR(s.sid,1,5) sid, p.spid, logon_time,
       SUBSTR(s.program,1,22) program , s.process pid_remote,
       s.status,
       ROUND(pga_used_mem/1024/1024) usme,
       ROUND(pga_alloc_mem/1024/1024) alme,
       ROUND(pga_freeable_mem/1024/1024) frme,
       ROUND(pga_max_mem/1024/1024) mame
FROM  v$session s,v$process p
WHERE p.addr=s.paddr
ORDER BY pga_max_mem,logon_time;