Date: Thu, 13 Jan 2022 10:30:10 -0800 From: Gleb Smirnoff <glebius@freebsd.org> To: Jamie Landeg-Jones <jamie@catflap.org> Cc: net@freebsd.org Subject: Re: compressed TIME-WAIT to be decomissioned Message-ID: <YeBvst%2BYHe108KSw@FreeBSD.org> In-Reply-To: <202201131825.20DIP6AT072280@donotpassgo.dyslexicfish.net> References: <Yd8im/VkTU1zdvOi@FreeBSD.org> <202201131825.20DIP6AT072280@donotpassgo.dyslexicfish.net>
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On Thu, Jan 13, 2022 at 06:25:06PM +0000, Jamie Landeg-Jones wrote:
J> > modern HTTP server can be lowered 3 times more. Feel free to lower
J> > net.inet.tcp.msl and do your own measurements with
J> > 'netstat -sp tcp | grep TIME-WAIT'. I'd be glad to see your results.
J>
J> Without changing net.inet.tcp.msl I get:
J>
J> | 18:18 (46.0°C 1100) (2) "/tmp" jamie@thompson% do-all-hosts 'netstat -sp tcp | grep TIME_WAIT'
J> | _______________________________________________________
J> | jamie@catflap: netstat -sp tcp | grep TIME_WAIT
J> | catflap: 1506 connections in TIME_WAIT state
J> | _______________________________________________________
J> | jamie@catnip: netstat -sp tcp | grep TIME_WAIT
J> | catnip: 1666 connections in TIME_WAIT state
J> | _______________________________________________________
J> | jamie@catseye: netstat -sp tcp | grep TIME_WAIT
J> | catseye: 2334 connections in TIME_WAIT state
J> |
J> | .
J> | .
J>
J> Not primarily webservers, but running an application with (obviously) lots of
J> short-lived tcp connections...
Sorry, the stats I was talking about are present in CURRENT only:
netstat -sp tcp | grep TIME-WAIT
3 times connection in TIME-WAIT responded with ACK
0 times connection in TIME-WAIT was actively recycled
0 times connection in TIME-WAIT responded with RST
I will merge it to stable/13 today, so that those running 13 can check it out.
--
Gleb Smirnoff
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