From owner-freebsd-stable@FreeBSD.ORG Wed Oct 5 22:49:07 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 24B1F106564A for ; Wed, 5 Oct 2011 22:49:07 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta08.emeryville.ca.mail.comcast.net (qmta08.emeryville.ca.mail.comcast.net [76.96.30.80]) by mx1.freebsd.org (Postfix) with ESMTP id 0AC868FC17 for ; Wed, 5 Oct 2011 22:49:06 +0000 (UTC) Received: from omta21.emeryville.ca.mail.comcast.net ([76.96.30.88]) by qmta08.emeryville.ca.mail.comcast.net with comcast id h8nb1h0041u4NiLA8Ap0tl; Wed, 05 Oct 2011 22:49:00 +0000 Received: from koitsu.dyndns.org ([67.180.84.87]) by omta21.emeryville.ca.mail.comcast.net with comcast id hAtG1h00T1t3BNj8hAtH2z; Wed, 05 Oct 2011 22:53:17 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id C600B102C1C; Wed, 5 Oct 2011 15:49:05 -0700 (PDT) Date: Wed, 5 Oct 2011 15:49:05 -0700 From: Jeremy Chadwick To: Steven Hartland Message-ID: <20111005224905.GA49954@icarus.home.lan> References: <2740DA0E7C0F495BA00E6D4BC0FE8F37@multiplay.co.uk> <41092663DF7A417D8A934A2840033412@multiplay.co.uk> <20111005004722.GA27935@icarus.home.lan> <19FA908AC3DD4788A4F8E50E45F06636@multiplay.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <19FA908AC3DD4788A4F8E50E45F06636@multiplay.co.uk> User-Agent: Mutt/1.5.21 (2010-09-15) Cc: liv3d@multiplay.co.uk, freebsd-stable@freebsd.org Subject: Re: serious packet routing issue causing ntpd high load? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 05 Oct 2011 22:49:07 -0000 On Wed, Oct 05, 2011 at 11:45:52PM +0100, Steven Hartland wrote: > ----- Original Message ----- From: "Jeremy Chadwick" > > > >1428 root 1 44 0 11900K 2860K select 0 0:17 0.00% /usr/sbin/ntpd -c /conf/ME/ntp.conf -p /var/run/ntpd.pid -f > > > >And "route -n monitor" shows no anomalies here. > > > >Maybe you should tcpdump to find out if there is a client or peer which > >is constantly pounding ntpd for some reason, or if ntpd is constantly > >nagging some peer? Not sure. > > Yep already checked this it seems we're seeing a MISS per packet sent > to mysql clients :( Can you explain what "MISS per packet" means, and what MySQL has to do with ntpd? Two confusing statements in one! :-) -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB |