From owner-freebsd-hackers Wed Oct 8 23:22:01 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id XAA11815 for hackers-outgoing; Wed, 8 Oct 1997 23:22:01 -0700 (PDT) (envelope-from owner-freebsd-hackers) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id XAA11810 for ; Wed, 8 Oct 1997 23:21:57 -0700 (PDT) (envelope-from j@uriah.heep.sax.de) Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id IAA09472; Thu, 9 Oct 1997 08:21:25 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.8.7/8.8.5) id IAA18628; Thu, 9 Oct 1997 08:11:09 +0200 (MET DST) Message-ID: <19971009081109.NI17492@uriah.heep.sax.de> Date: Thu, 9 Oct 1997 08:11:09 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: hackers@FreeBSD.ORG Cc: jonny@coppe.ufrj.br (Joao Carlos Mendes Luis) Subject: Re: TCP problem References: <199710082259.PAA24090@implode.root.com> <199710090213.AAA28099@gaia.coppe.ufrj.br> X-Mailer: Mutt 0.60_p2-3,5,8-9 Mime-Version: 1.0 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk As Joao Carlos Mendes Luis wrote: > // >/usr/sbin/sysctl -w net.inet.tcp.sendspace=65536 > // >/usr/sbin/sysctl -w net.inet.tcp.recvspace=65536 > // This is the cause of the problem. You really don't want to change > these, anyway. You'll see the best performance at the default of > 16KB. > So, what's the good thing about RFC1323 ? Both, RFC 1323 and the socket buffer space size, are not related at all. Btw., read the other threads about TCP problems in -hackers that took place within the last four or five days. Also read the commit message for tcp_output.c revision 1.27 to learn what the actual problem has been (and why it is related to your bumping the send buffer space). -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)