Mbuff on freebsd 4.x

[Volker Lieder]

Hello list,
i have a problem on several freebsd-servers with the mbufs shown by 
netstat -m
I have already compiled the kernel to switch the allocated size to 
128MB mbufs
and 32MB mbufs clusters, but some systems take the hole memory by time.
First the system only needs 8MB. Has someone the same problems?
My issue is that the system has problems to free the memory.
Anybody an idea?

Volker Lieder