From owner-freebsd-net Mon Nov 6 2:33:52 2000 Delivered-To: freebsd-net@freebsd.org Received: from bart.esiee.fr (bart.esiee.fr [147.215.1.20]) by hub.freebsd.org (Postfix) with ESMTP id 2CBA537B479 for ; Mon, 6 Nov 2000 02:33:49 -0800 (PST) Received: (from bonnetf@localhost) by bart.esiee.fr (8.11.1/8.11.1) id eA6AXb804873; Mon, 6 Nov 2000 11:33:38 +0100 (MET) From: Frank Bonnet Message-Id: <200011061033.eA6AXb804873@bart.esiee.fr> Subject: Re: tcp sendspace/recvspace To: blaz@amis.net Date: Mon, 06 Nov 2000 11:33:37 MET Cc: dg@root.com, freebsd-net@FreeBSD.ORG In-Reply-To: ; from "Blaz Zupan" at Nov 5, 2000 11:11 pm X-Mailer: Elm [revision: 212.5] Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > > > I've been messing around with the net.inet.tcp.sendspace and > > 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 > > 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 connections > > still using the old 16K values. > > Any objections to increasing the defaults in FreeBSD to 32K? > > I actually wanted to suggest the same some time ago. Some time ago I was > trying to find out why a certain Linux box can download at much higher speed > over a satellite link than a FreeBSD box. Well, the default TCP window size in > Linux is higher. Increasing it on FreeBSD, more than doubled the transfer > speed. I've applied THIS modification on our proxy/cache server running FreeBSD 4.1.1 and Squid, it seems performances are much better for web access and downloads ( sorry for my bad english ...) Any help from FreeBSD-Net gurus to "tune" a web proxy-cache machine would be very much appreciated , any web pointers too. The machine hasn't any ppp link only LAN access ( ethernet ) Thanks a lot -- Frank Bonnet Groupe ESIEE Paris To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message