[PATCH] Simple ARC stats in top

[John Baldwin]

On Tuesday, June 26, 2012 12:02:36 am J. Hellenthal wrote:
> 
> On Mon, Jun 25, 2012 at 02:43:41PM -0400, John Baldwin wrote:
> > I have some patches based on a script I got from avg@ that add some 
simplistic 
> > ARC stats to top so that one can see how much of wired memory is set aside 
for 
> > ARC, and how that memory is split up.  The patch is against 8-stable:
> > http://www.FreeBSD.org/~jhb/patches/top_arc.patch
> > 
> > Sample output:
> > 
> > Mem: 1245M Active, 1393M Inact, 21G Wired, 309M Buf, 23G Free
> > ARC: 19G Total, 1381M MRU, 17G MFU, 272K Anon, 232M Header, 442M Other
> > Swap: 8192M Total, 8192M Free
> > 
> > Comments, etc.?
> > 
> 
> Run with it!
> 
> Only question I can come up with throughout this patch is how would it
> act on a system that was built WITHOUT_ZFS ?
> 
> I just tested it out on a machine where there is no ZFS and one where
> there is and its golden. I don't have the resources to test for
> WITHOUT_ZFS though.

It should be fine.  It just determines if the sysctl's are present at
runtime.  It doesn't use any ZFS libraries, etc. so WITHOUT_ZFS shouldn't
matter.

-- 
John Baldwin