Date: Mon, 8 Oct 2007 09:12:52 +1000 From: Peter Jeremy <peterjeremy@optushome.com.au> To: Rolf Witt <fbsd-st@donut.de> Cc: freebsd-current@freebsd.org Subject: Re: Question about netstat -s output (xx discarded due to memory problems) Message-ID: <20071007231252.GI74080@turion.vk2pj.dyndns.org> In-Reply-To: <47090D1F.2090502@donut.de> References: <47090D1F.2090502@donut.de>
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--6c2NcOVqGQ03X4Wi Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2007-Oct-07 18:45:19 +0200, Rolf Witt <fbsd-st@donut.de> wrote: >which is the exact cause of: "46 discarded due to memory problems" >(section tcp) in a netstat -s output? Looking at the source, this is tcps_rcvmemdrop - which is incremented in sys/netinet/tcp_reass.c:tcp_reass() when either: - A segment is dropped to prevent the TCP reassembly queue getting too large (this will also increment net.inet.tcp.reass.overflows) - A new queue entry can't be allocated because tcp_reass_zone is full. >Since the Sourcen of in the middle of Septembers see I there values >greater than zero. This implies you are receiving excessive out-of-order packets - which is undesirable but not under your control. --=20 Peter Jeremy --6c2NcOVqGQ03X4Wi Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFHCWf0/opHv/APuIcRAuL7AJ4kczSplTxug+e1fdmm2EkWqBL0XwCguGu4 41CJaoYnaMwhhnReveffu10= =+NHp -----END PGP SIGNATURE----- --6c2NcOVqGQ03X4Wi--
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