From owner-freebsd-performance@FreeBSD.ORG Sun Aug 31 20:09:06 2003 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D732516A4BF for ; Sun, 31 Aug 2003 20:09:06 -0700 (PDT) Received: from giskard.ag0ny.com (flets-tokyo-1-141.dsn.jp [61.213.134.141]) by mx1.FreeBSD.org (Postfix) with SMTP id 8E6AB43F3F for ; Sun, 31 Aug 2003 20:09:05 -0700 (PDT) (envelope-from ag0ny@ag0ny.com) Received: (qmail 72799 invoked from network); 1 Sep 2003 03:09:02 -0000 Received: from flets-tokyo-1-141.dsn.jp (HELO www.ag0ny.com) (61.213.134.141) by 0 with SMTP; 1 Sep 2003 03:09:02 -0000 Received: from nat.isr.co.jp ([210.251.64.163]) (SquirrelMail authenticated user ag0ny1) by www.ag0ny.com with HTTP; Mon, 1 Sep 2003 12:09:02 +0900 (JST) Message-ID: <33399.210.251.64.163.1062385742.squirrel@www.ag0ny.com> Date: Mon, 1 Sep 2003 12:09:02 +0900 (JST) From: "Javi Lavandeira" To: freebsd-performance@freebsd.org User-Agent: SquirrelMail/1.4.0 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-2022-jp X-Priority: 3 Importance: Normal Subject: PPP performance X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: ag0ny@ag0ny.com List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 01 Sep 2003 03:09:07 -0000 Hi, I'm running a 4.6.2-RELEASE system on a PPPoE link, using user-ppp. Since saturday, we're running a new service on this host, and we're getting around 160 DNS requests/second, using tinydns, serving several zones. One of them containing several hundred thousand records. Bandwidth usage is low: around 25KBytes in and 80-100KBytes out average. The problem is that now user-ppp seems to be eating up 25% of the CPU: PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND 76 root 30 0 3976K 2364K RUN 727:32 22.17% 22.17% ppp This system has been running for more than a year, and there have been transfer peaks of more than 20MBits/s, without impacting the ppp daemon in this way. Any ideas about why ppp is causing this load, and how to solve the problem? I've been googling about this, and read something about kernel-ppp being faster, but couldn't find anything about kernel-ppp in the handbook. Thanks in advance,