> top output on Red Hat 9 (limited to relevant lines) > PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND > 7002 marco 15 0 24504 21M 8976 S 6.3 17.4 0:44 0 mozilla-bin > 898 root 15 0 45240 11M 976 S 2.3 9.4 72:47 0 X > 8529 marco 16 0 1116 1116 820 R 0.7 0.8 0:00 0 top > 901 marco 15 0 1344 1184 640 S 0.3 0.9 0:46 0 fluxbox > 7510 marco 15 0 20748 19M 11716 S 0.3 15.6 0:51 0 soffice.bin > 995 marco 15 0 3416 2840 580 S 0.1 2.2 0:54 0 xterm > 1 root 15 0 112 84 56 S 0.0 0.0 0:05 0 init I'm not sure thats the correct way to check. try typing cat /proc/<PID HERE>/status VmSize: 5020 kB <-- think thats what you're looking for VmLck: 0 kB VmRSS: 1144 kB VmData: 436 kB VmStk: 36 kB VmExe: 616 kB VmLib: 3800 kB ps/top is only giving a percentage of total ram I think. Here is my ps output 3351 0.0 1.8 5020 1116 tty1 S Jun11 0:09 fluxbox If I'm wrong let me know.