Where is the memory

[scuba at centroin.com.br]

Hi,

	How can I track where/who is using the system memory?

	I have a 2GB (RAM) system running Freebsd 5.4, basically as a mail
gateway.

	After a few hours up, TOP shows me about 300MB of free memory. No
swap yet.

	But the sum of RSS column of "ps axum", gives me about 600MB used.
	I know that kernel allocated memory doesn´t show in ps, but I
think it´s not using 1.4GB.

	The head of top is like this:

last pid:  7323;  load averages:  1.49,  1.11,  1.30  up 4+05:57:30  19:01:05
184 processes: 1 running, 183 sleeping
CPU states: 16.7% user,  0.0% nice,  3.5% system,  0.6% interrupt, 79.3% idle
Mem: 333M Active, 1218M Inact, 157M Wired, 42M Cache, 112M Buf, 256M Free
Swap: 8192M Total, 8192M Free

	Also, why there is a difference between free memory reported by
top and vmstat?

	Could it have some memory leak? Is there any report of it in
freebsd 5.x?

Thank you,

- Marcelo