From owner-freebsd-net Sun Nov 5 17:23: 2 2000 Delivered-To: freebsd-net@freebsd.org Received: from citusc17.usc.edu (citusc17.usc.edu [128.125.38.177]) by hub.freebsd.org (Postfix) with ESMTP id 137E337B4E5 for ; Sun, 5 Nov 2000 17:22:57 -0800 (PST) Received: (from kris@localhost) by citusc17.usc.edu (8.11.1/8.11.1) id eA61O1308796; Sun, 5 Nov 2000 17:24:01 -0800 (PST) (envelope-from kris) Date: Sun, 5 Nov 2000 17:24:00 -0800 From: Kris Kennaway To: David Greenman Cc: freebsd-net@FreeBSD.ORG Subject: Re: tcp sendspace/recvspace Message-ID: <20001105172400.A8778@citusc17.usc.edu> References: <200011052202.OAA24207@implode.root.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-md5; protocol="application/pgp-signature"; boundary="EVF5PPMfhYS0aIcm" Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200011052202.OAA24207@implode.root.com>; from dg@root.com on Sun, Nov 05, 2000 at 02:02:44PM -0800 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org --EVF5PPMfhYS0aIcm Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Nov 05, 2000 at 02:02:44PM -0800, David Greenman wrote: > I've been messing around with the net.inet.tcp.sendspace and=20 > net.inet.tcp.recvspace parameters on ftp.freesoftware.com and have found > that there is a significant performance improvement when increasing these > to 32768 bytes. Apparantly there are enough systems out there with higher > window maxes that it really does make a difference. By significant=20 > improvement, I mean about a average of a 20% increase in Mbps per user, > and this was just the change over a 30 minute period with lots of connect= ions > still using the old 16K values. > Any objections to increasing the defaults in FreeBSD to 32K? Won't this impact the latency of multiple connections over a slow PPP link? Kris --EVF5PPMfhYS0aIcm Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (FreeBSD) Comment: For info see http://www.gnupg.org iEYEARECAAYFAjoGCC8ACgkQWry0BWjoQKVnywCgtho5cl8IN9GDSp4ZntINW4Gx /WUAoO1tiCGIaHRy65auWQMM6cmq0VZN =1a/M -----END PGP SIGNATURE----- --EVF5PPMfhYS0aIcm-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message