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From: Stefan Bethke <stb@lassitu.de>
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Subject: Re: TCP Reassembly Issues
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Am 24.11.2011 um 21:30 schrieb Kris Bauer:

> On Thu, Nov 24, 2011 at 1:20 PM, Raul <raul@turing.b2n.org> wrote:
>=20
> I am seeing the same sorts of things in netstat & vmstat:
>=20
> # netstat -s -p tcp |grep mem
> 742935 discarded due to memory problems
>=20
> # vmstat -z |grep tcpreass
> tcpreass: 40, 16464, 16340, 124, 131485,955443, 0

Same here:
root@diesel:~# netstat -s -p tcp |grep mem
		529211 discarded due to memory problems
root@diesel:~# vmstat -z |grep tcpreass
tcpreass:                40,   1680,    1679,       1,  118846,831450,   =
0
root@diesel:~# uname -a
FreeBSD diesel.lassitu.de 9.0-PRERELEASE FreeBSD 9.0-PRERELEASE #20: Fri =
Nov 18 21:57:59 CET 2011     =
root@diesel.lassitu.de:/usr/obj/usr/src/sys/DIESEL  amd64
root@diesel:~# uptime
11:01PM  up 5 days, 23:15, 1 user, load averages: 0.14, 0.04, 0.01
root@diesel:~# svn info /usr/src
Path: /usr/src
Working Copy Root Path: /usr/src
URL: http://mirror.hanse.de/svn/freebsd/base/stable/9
Repository Root: http://mirror.hanse.de/svn/freebsd/base
Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Revision: 227665
Node Kind: directory
Schedule: normal
Last Changed Author: fabient
Last Changed Rev: 227664
Last Changed Date: 2011-11-18 15:41:48 +0100 (Fri, 18 Nov 2011)

I regularly copy large files off my Tivo trans-atlantic (125ms RTT), and =
TCP connections currently stall after about 500 megs, never recovering.  =
I suspect this is connected, as it started immediately after upgrading =
the machine to 9-stable.

As far as I can tell, the problem does not exist with 8-stable.


Stefan

--=20
Stefan Bethke <stb@lassitu.de>   Fon +49 151 14070811