Subject: Re: default vnodes in the system
To: Chuck Silvers <>
From: David Brownlee <>
List: tech-kern
Date: 06/02/2003 16:26:44
	It would be nice to have an option to use a specific percentage of
	RAM (similar to BUFCACHE).

On Mon, 2 Jun 2003, Chuck Silvers wrote:

> this is a fine short-term change, I bump it up to about 1.5% myself
> (which is really 3.8% if you count the FFS inode with each vnode).
> we should check that this doesn't cause trouble for really small-memory
> configurations, but otherwise it should be fine.
> in the longer term I think we want to move to a scheme where the
> number of vnodes can grow and shrink with usage (within some bounds),
> generally making vnodes compete for memory more dynamically than they
> do right now.  this will probably be tricky to get right, though.
> -Chuck
> On Mon, Jun 02, 2003 at 06:34:18PM +1000, matthew green wrote:
> > i think 0.5% is too few.  (was this before UBC?  0.5% probably
> > made more sense back then...)  i'd pick something between 1% and
> > 2% probably...
> >
> > what do people think?  perhaps as a first step raising it to 1%
> > would alleviate most of the problem[*]

		David/absolute          -- No hype required --