From owner-freebsd-hackers Wed Jul 14 13:26:41 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from dingo.cdrom.com (dingo.cdrom.com [204.216.28.145]) by hub.freebsd.org (Postfix) with ESMTP id 8BA5D14E5F for ; Wed, 14 Jul 1999 13:26:39 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost.cdrom.com [127.0.0.1]) by dingo.cdrom.com (8.9.3/8.8.8) with ESMTP id NAA01388; Wed, 14 Jul 1999 13:21:55 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Message-Id: <199907142021.NAA01388@dingo.cdrom.com> X-Mailer: exmh version 2.0.2 2/24/98 To: "John W. DeBoskey" Cc: freebsd-hackers@freebsd.org Subject: Re: tcp windowsize query? In-reply-to: Your message of "Wed, 14 Jul 1999 16:08:14 EDT." <199907142008.QAA69071@bb01f39.unx.sas.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 14 Jul 1999 13:21:55 -0700 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > Hi, > > I'm trying to dynamically determine the tcp windowsize. Sysctl > has the following to say, but the name/value pairs are not > documented. > > net.inet.tcp.sendspace: 16384 > net.inet.tcp.recvspace: 16384 ... > send/recv space might be what I'm looking for... They're the default send/receive window sizes, yes. You can tweak them with socket ioctls on a per-socket basis. > delayed ack sounds interesting.... Turning that off disables TCP slow-start. It's a huge performance booster for things like SMB service, where you have lots of short-lived TCP connections on a local net. -- \\ The mind's the standard \\ Mike Smith \\ of the man. \\ msmith@freebsd.org \\ -- Joseph Merrick \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message