all, I got confused with user memory on HP-UX. when query by select v$sesstat.sid, v$sysstat.name, v$sesstat.value from v$sysstat , v$sesstat where v$sysstat.STATISTIC# = v$sesstat.STATISTIC# and v$sysstat.name in ('session pga memory','session uga memory') order by 1,2; each session only takes up to 4MB. but from GLANCE (UX monitor tool) it took 23MB. what is the problem??? from OS perfective , it seems the machine has very high utilization. -- regards ujang jakarta - indonesia http://ujang-id.blogspot.com -- //www.freelists.org/webpage/oracle-l