Subject: Re: vnode usage and reclaimation - feels like deadlocking
To: Stephen M. Jones <>
From: David Brownlee <>
List: tech-net
Date: 01/16/2004 20:37:30
On Fri, 16 Jan 2004, Stephen M. Jones wrote:

> What would be a good value for kern.maxvnodes?  Is that even an issue?
> Can it go beyond 65536? (should I even be setting it?)  Does it have a max
> value?  I realise a vnode represents all sorts of objects (files, sockets,
> symlinks .. fifos) so it will vary if a machine is totally pigged out and
> in that case, should you have your kern.maxvnodes set to take care of
> all your potential resources? Is reclaimation done any differently on
> an NFS client or vnodes that map to NFS objects?

	On all but very low memory machines I tend to set NVNODE to
	131072 or 262144. It does consume quite a bit of memory, but
	it does help dealing with large directory structures (pkgsrc,
	large websites, rsyncing).

	The way thinsg are handled has be reworked significantly in -current
	leading to (as I understand) less effective memory cost per vnode.

	As a data point I'd definitely try it very high on one of
	the problem machines. You also might want to try dropping in
	a -current kernel and keeping everything else the same on one

		David/absolute          -- No hype required --