From owner-freebsd-questions Sun Mar 16 6:51:46 2003 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BC4DB37B401 for ; Sun, 16 Mar 2003 06:51:44 -0800 (PST) Received: from naboo.blacktrap.net (212.68.218.22.brutele.be [212.68.218.22]) by mx1.FreeBSD.org (Postfix) with ESMTP id 64CBE43F75 for ; Sun, 16 Mar 2003 06:51:32 -0800 (PST) (envelope-from odony@student.info.ucl.ac.be) Received: from arkania (olinether@arkania [192.168.2.21]) by naboo.blacktrap.net (8.12.3/8.12.3) with SMTP id h2GEsdLc005022; Sun, 16 Mar 2003 15:54:44 +0100 (CET) (envelope-from odony@student.info.ucl.ac.be) Message-ID: <005d01c2ebcb$82b343b0$1502a8c0@blacktrap.net> Reply-To: "Olivier Dony" From: "Olivier Dony" To: Subject: Too many collisions on network? Date: Sun, 16 Mar 2003 15:51:16 +0100 Organization: UCL MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hello, I have a webserver serving a lot of requests (almost filling up 4 Mbits/s of http at peak time everyday). It's running Apache 1.3.27 on FreeBSD 4.7-RELEASE, and there are usually about 200-250 http processes running. Today I was looking at the various *stat tools to monitor it, and noticed a high number of network collisions ie : root@charon:/root# netstat 5 input (Total) output packets errs bytes packets errs bytes colls 1598 0 190789 2035 0 2326238 659 1722 0 220532 2298 0 2958770 981 2547 0 347703 3078 0 2701052 1211 1937 0 274644 2461 0 3332772 1117 1619 0 235935 2169 0 2795248 725 1739 0 262005 2257 0 2076768 885 1461 0 255291 1781 0 2120986 537 1685 0 273239 1941 0 2144180 699 and so on... Earlier today there has been a time where the webserver was unreachable, with 1 out of 200 packets reaching it only, then everything went back to normal. Nothing unusual in the logs. Is there a way for me to see if the problem was the webserver itself or the network? And is this amount of collisions suspicious, given that the ISP is of course running a switched network? Thanks in advance for any ideas :-) Olivier PS: Lately I have been unable to post anything on the freebsd mailing-lists from my blacktrap.net e-mail address, the mails are accepted by the MX but seem to be discarded. I mailed postmaster@freebsd.org but did not receive any answer, maybe the mail was discarded too. What can I do about this? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message