Date: Sat, 2 Jun 2001 01:31:06 +0200 From: Jesper Skriver <jesper@skriver.dk> To: Mike Holling <myke@ees.com> Cc: Matt Dillon <dillon@earth.backplane.com>, Juha Saarinen <juha@saarinen.org>, Blaz Zupan <blaz@si.FreeBSD.org>, freebsd-stable@FreeBSD.ORG Subject: Re: poor performance with FreeBSD and Windows ICS Message-ID: <20010602013105.B30539@skriver.dk> In-Reply-To: <Pine.BSF.4.21.0106011231490.11009-100000@av.fks.lan>; from myke@ees.com on Fri, Jun 01, 2001 at 12:38:01PM -0600 References: <200106010136.f511aUZ79086@earth.backplane.com> <Pine.BSF.4.21.0106011231490.11009-100000@av.fks.lan>
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On Fri, Jun 01, 2001 at 12:38:01PM -0600, Mike Holling wrote: > > 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? Could you give examples of what you did with rfc1323 extensions, just enabled it in /etc/rc.conf, without touching the send/recieve buffers, or ? Could you also please give a example of a site that you would get hanging connections to ? What do you mean with hanging connections ? /Jesper -- Jesper Skriver, jesper(at)skriver(dot)dk - CCIE #5456 Work: Network manager @ AS3292 (Tele Danmark DataNetworks) Private: FreeBSD committer @ AS2109 (A much smaller network ;-) One Unix to rule them all, One Resolver to find them, One IP to bring them all and in the zone to bind them. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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