oracle cpu per session
SELECT ss.USERNAME, se.SID, se.VALUE / 100 CPU_USAGE_SECONDS FROM V$SESSION ss, V$SESSTAT se, V$STATNAME sn WHERE se.STATISTIC# = sn.STATISTIC# AND NAME LIKE '%CPU used by this session%' AND se.SID = ss.SID AND ss.STATUS = 'ACTIVE' AND ss.USERNAME IS NOT NULL ORDER BY VALUE DESC;