From owner-freebsd-net  Thu Jun 27  9:12: 9 2002
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Date: Thu, 27 Jun 2002 09:08:11 -0700 (PDT)
From: Patrick Thomas <root@utility.clubscholarship.com>
To: Alfred Perlstein <bright@mu.org>
Cc: Mike Silbersack <silby@silby.com>, <freebsd-net@freebsd.org>
Subject: Re: tune down recvspace for this ?
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two followups:

1) is the tcp.recvspace an immediate tunable, or to get best results
should I set it in rc.local ?

2) when you say raise nmbclusters "in his config", may I assume you men my
kernel config - mine is at the default - do you have a suggestion for the
new setting ?

thanks,

PT

On Thu, 27 Jun 2002, Alfred Perlstein wrote:

> * Mike Silbersack <silby@silby.com> [020627 05:10] wrote:
> >
> > On Thu, 27 Jun 2002, Patrick Thomas wrote:
> >
> > > 99/10208/34816 mbufs in use (current/peak/max):
> > >
> > > Would changing net.inet.tcp.recvspace down to 32768 (default is 65536) be
> > > a wise thing to do ?
> > >
> > > Or are there other better suggestions ?
> > >
> > > thanks,
> > >
> > > PT
> >
> > Actually, you usually use most of your mbuf (clusters) for sending, not
> > receiving.  Hence, sendspace is what you may wish to kick down in order to
> > reduce usage.
>
> True, but it looks like he could raise nmbclusters in his config intead
> of throttling.
>
> --
> -Alfred Perlstein [alfred@freebsd.org]
> 'Instead of asking why a piece of software is using "1970s technology,"
>  start asking why software is ignoring 30 years of accumulated wisdom.'
> Tax deductible donations for FreeBSD: http://www.freebsdfoundation.org/
>


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