Date: Fri, 1 Jun 2001 12:38:01 -0600 (MDT) From: Mike Holling <myke@ees.com> To: Matt Dillon <dillon@earth.backplane.com>, Juha Saarinen <juha@saarinen.org>, Blaz Zupan <blaz@si.FreeBSD.org> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: poor performance with FreeBSD and Windows ICS Message-ID: <Pine.BSF.4.21.0106011231490.11009-100000@av.fks.lan> In-Reply-To: <200106010136.f511aUZ79086@earth.backplane.com>
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> 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
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