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Date: Tue, 28 Feb 2012 23:23:52 -0800
From: Doug Barton <dougb@FreeBSD.org>
Organization: http://SupersetSolutions.com/
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To: Florian Smeets <flo@FreeBSD.org>
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Cc: stable@FreeBSD.org, current@FreeBSD.org, Steve Wills <swills@FreeBSD.org>,
	=?UTF-8?B?eiBXxIVzaWtvd3NraQ==?= <lukasz@wasikowski.net>,
	Arnaud Lacombe <lacombar@gmail.com>,
	Alexander Leidinger <Alexander@leidinger.net>,
	"Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, =?UTF-8?B?xYF1a2Fz?=
Subject: Re: flowtable usable or not
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On 02/28/2012 15:08, Florian Smeets wrote:

> I talked to Kip Macy, who implemented flowtable, about this. He
> thinks that the problem was caused by inappropriate default setting
> of net.inet.ip.output_flowtable_size. This should have been fixed
> by r205488 which was MFC'd to 8 and should be part of 8.2 and of
> course 9.0. However nobody who experienced the problem wanted to
> try any of these releases with flowtable enabled, so we still don't
> know if it's fixed or not.
> 
> Should anyone try this it could certainly be the case that 
> net.inet.ip.output_flowtable_size needs to be tuned even more.

I tried it, on both FreeBSD routers, web systems, and database
servers; all on 8.2+. It still causes massive instability. Disabling
the sysctl, and/or removing it from the kernel solved the problems.


Doug

- -- 

	It's always a long day; 86400 doesn't fit into a short.

	Breadth of IT experience, and depth of knowledge in the DNS.
	Yours for the right price.  :)  http://SupersetSolutions.com/

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