Subject: Re: no buffer space available
To: None <firstname.lastname@example.org>
From: Brad Spencer <email@example.com>
Date: 06/25/2001 10:28:59
I havent been really paying attention to this thread, but
maybe increasing the value of kern.mbuf.nmbclusters with sysctl -w might
fix the problem. Or you might want to recompile your kernel with a higher
value for NMBCLUSTERS.
On Sun, Jun 24, 2001 at 01:15:58PM -0400, Kevin P. Neal wrote:
> On Sat, Jun 23, 2001 at 08:30:59PM -0400, Brad Spencer wrote:
> > One potential reason for this is an overloaded ppp link. This plagued me
> > when a 28.8 async. ppp link was my only connection to the Net.
> > What I think occurs is that there is so much backed up traffic waiting to
> > go out the pipe that the system runs out of space. This effects UDP and
> > ICMP traffic the most.
> Which is totally unacceptable.
> It seems unreasonable for the link to become so backed up that nothing
> can ever be sent out of it again (until it is bounced).
> Why can't it drop data with 'no buffer space' errors while it tries to
> send what it does currently have in buffers?
> "A method for inducing cats to exercise consists of directing a beam of
> invisible light produced by a hand-held laser apparatus onto the floor ...
> in the vicinity of the cat, then moving the laser ... in an irregular way
> fascinating to cats,..." -- US patent 5443036, "Method of exercising a cat"
With the problem of a link being over loaded, that will help some, but it
will probably not make all instances go away. A reasonably fast computer
can still fill any amount of space that is provided, if the link is backed
I think I was up to 32k when all I had to the Net was a 28.8 link [which
was usually a bit less, as we had rather bad phone lines where I am at].
I would still get "no buffer space" messages from time to time.
Brad Spencer - firstname.lastname@example.org
http://anduin.eldar.org - & - http://anduin.ipv6.eldar.org [IPv6 only]
[finger email@example.com for PGP public key]