flowtable usable or not
dougb at FreeBSD.org
Wed Feb 29 07:23:55 UTC 2012
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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.
It's always a long day; 86400 doesn't fit into a short.
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