limiting Buf memory

[Wojciech Puchar]

>> Mem: 529M Active, 209M Inact, 149M Wired, 38M Cache, 109M Buf, 1772K Free
>> 
>> while "Cache" is dynamic, Buf is not and never goes down.
>> 
>> how can i get it down to somehow like 40MB?
>
> I think "Buf" corresponds to what NetBSD's top calls "File", it's the amount 
> of memory that is bufferring raw blocks from the disk.  Your traditional VM 
> disk cache is the "Cache" entry.
>
possibly you don't understand my question which is - how to set limits to 
"Buf" because it's now always 110MB. i