From owner-freebsd-current@FreeBSD.ORG Fri Jan 9 02:59:16 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 74D9B16A4CE; Fri, 9 Jan 2004 02:59:16 -0800 (PST) Received: from gate1.psi.de (gate1.psi.de [194.115.214.187]) by mx1.FreeBSD.org (Postfix) with ESMTP id 899BD43D45; Fri, 9 Jan 2004 02:59:12 -0800 (PST) (envelope-from thorsten@tgreiner.net) Received: from INFRA-BLN-EX2K.psi.de (host-138.194.115.213.psi.de [194.115.213.138]) by gate1.psi.de (8.11.3/8.11.3) with ESMTP id i09AxBE24275; Fri, 9 Jan 2004 11:59:11 +0100 Received: from infra-nev-exf.psi.de ([194.115.215.7]) by INFRA-BLN-EX2K.psi.de with Microsoft SMTPSVC(5.0.2195.6713); Fri, 9 Jan 2004 11:59:24 +0100 Received: from comm-nev1.nev.psi.de ([194.115.215.40]) by infra-nev-exf.psi.de with Microsoft SMTPSVC(5.0.2195.6713); Fri, 9 Jan 2004 11:59:23 +0100 Received: from localhost. (dhcp245.nev.psi.de [192.168.142.245]) by comm-nev1.nev.psi.de (8.8.8+Sun/8.8.8) with ESMTP id LAA04102; Fri, 9 Jan 2004 11:58:50 +0100 (MET) Received: from localhost. (localhost [127.0.0.1]) by localhost. (8.12.10/8.12.10) with ESMTP id i09Awo7B001842; Fri, 9 Jan 2004 11:58:50 +0100 (CET) (envelope-from thorsten@tgreiner.net) Received: (from thorsten@localhost) by localhost. (8.12.10/8.12.10/Submit) id i09AwoCK001841; Fri, 9 Jan 2004 11:58:50 +0100 (CET) (envelope-from thorsten@tgreiner.net) X-Authentication-Warning: localhost.: thorsten set sender to thorsten@tgreiner.net using -f Date: Fri, 9 Jan 2004 11:58:50 +0100 From: Thorsten Greiner To: Andre Oppermann Message-ID: <20040109105850.GA1803@tybalt.nev.psi.de> References: <20040109085522.GB4246@tybalt.nev.psi.de> <3FFE8232.730F70B8@freebsd.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="pf9I7BMVVzbSWLtt" Content-Disposition: inline In-Reply-To: <3FFE8232.730F70B8@freebsd.org> X-GPG-Fingerprint: ED45 DF41 BE30 6FF5 DC4F 15C3 4538 6598 E865 F66A User-Agent: Mutt/1.5.5.1i X-OriginalArrivalTime: 09 Jan 2004 10:59:23.0460 (UTC) FILETIME=[A3E8E840:01C3D69F] cc: current@freebsd.org Subject: Re: the TCP MSS resource exhaustion commit X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Jan 2004 10:59:16 -0000 --pf9I7BMVVzbSWLtt Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * Andre Oppermann [2004-01-09 11:34]: > You can simply increase net.inet.tcp.minmssoverload to any > higher value. I suggest 2,000 as next step. If set it to > 0 the check will be disabled entirely. >=20 > This makes we wonder why the Oracle database server is sending > so many small packets. Is your JBoss application doing connection > pooling (eg. multiplexing multiple SQL sessions over one tcp > session)? >=20 > The documentation for these sysctl's is on its way. Thanks for your response, I will try your suggestion soon. In the meantime I have found another problem: remote login via ssh, do a 'tar tvf largefile.tar' and you are out: Jan 9 11:54:41 tybalt kernel: too many small tcp packets from XX.XX.XX.XX:5632, av. 215byte/packet, dropping connection The destination machine is the same SUN database server I mentioned above and I have not applied the sysctl changes you suggested. Regards -Thorsten --=20 Any fool can paint a picture, but it takes a wise person to be able to sell it. This message is digitally signed. To verify its integrity, download a copy of GnuPG for your operating system from http://www.gnupg.org . --pf9I7BMVVzbSWLtt Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQE//olqRThlmOhl9moRAonXAKCSs9fpiEeWg+lsR7d/AxdGyQMSoQCfbTCw /MgzIiUGoKPfzY7EqgIuTRM= =jNcn -----END PGP SIGNATURE----- --pf9I7BMVVzbSWLtt--