Date: Mon, 5 Jan 2009 13:13:24 +0000 (GMT) From: Robert Watson <rwatson@FreeBSD.org> To: Lin Jui-Nan Eric <ericlin@tamama.org> Cc: freebsd-net@freebsd.org, stable@freebsd.org Subject: Re: TCP packet out-of-order problem Message-ID: <alpine.BSF.2.00.0901051312370.98366@fledge.watson.org> In-Reply-To: <47713ee10901012249w65c659bbp3366e4d8ef25c59d@mail.gmail.com> References: <47713ee10812301206j12b35264o715976c154080a1b@mail.gmail.com> <47713ee10901012147k1f25c31bn512dd29b2b294ad5@mail.gmail.com> <47713ee10901012249w65c659bbp3366e4d8ef25c59d@mail.gmail.com>
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On Fri, 2 Jan 2009, Lin Jui-Nan Eric wrote: > After running "netstat -s -p tcp", we found that lots of packets are > discarded due to memory problems. We googled for it, and found that sysctl > oid "net.inet.tcp.reass.maxsegments" became 0, therefore packets never > reassembled. > > Then we checked our /boot/loader.conf and /etc/sysctl.conf, and found that > setting kern.ipc.nmbclusters="0" makes net.inet.tcp.reass.maxsegments=0. > After setting net.inet.tcp.reass.maxsegments="1600" in /boot/loader.conf, > the network works perfectly now. Was it set to 0 through a configuration error, or did the system auto-tune improperly? Robert N M Watson Computer Laboratory University of Cambridge > > Thank you all for the help! > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >
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