From owner-freebsd-stable Fri Jun 1 11:35:20 2001 Delivered-To: freebsd-stable@freebsd.org Received: from av.fks.lan (hh1101066.direcpc.com [206.71.101.66]) by hub.freebsd.org (Postfix) with ESMTP id E6A8A37B423 for ; Fri, 1 Jun 2001 11:35:14 -0700 (PDT) (envelope-from myke@ees.com) Received: from localhost (myke@localhost) by av.fks.lan (8.11.3/8.11.1) with ESMTP id f51Ic2R11640; Fri, 1 Jun 2001 12:38:03 -0600 (MDT) (envelope-from myke@ees.com) X-Authentication-Warning: av.fks.lan: myke owned process doing -bs Date: Fri, 1 Jun 2001 12:38:01 -0600 (MDT) From: Mike Holling X-Sender: myke@av.fks.lan To: Matt Dillon , Juha Saarinen , Blaz Zupan Cc: freebsd-stable@FreeBSD.ORG Subject: Re: poor performance with FreeBSD and Windows ICS In-Reply-To: <200106010136.f511aUZ79086@earth.backplane.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG > Try increasing the TCP buffer sizes. That's the net.inet.tcp.sendspace > and net.inet.tcp.recvspace sysctl's. Satellite links have huge > latencies and can easily fill the 16K default tcp stream buffer size. > Try bumping them up to 60000 and if that works you can try going even > larger... e.g. 262144. Try 60000 first, if that works well stick with > it because values >= 65536 require tcp window sizing to be supported > and not all platforms implement it properly. Upping sendspace and recvspace fixed the problem, I was able to get a file at 67Kbyte/sec which only came down at 25 before changing the values. 65535 seems to be a good value for both parameters. Enabling RFC 1323 extensions had a bad effect, after enabling extensions all my transfers would hang. Is there a place to put this in the FAQ? - Mike To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message