From nobody Thu Jan 13 18:30:10 2022 X-Original-To: net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id C39F41954097 for ; Thu, 13 Jan 2022 18:30:18 +0000 (UTC) (envelope-from glebius@freebsd.org) Received: from cell.glebi.us (glebi.us [162.251.186.162]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "cell.glebi.us", Issuer "cell.glebi.us" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4JZXzY4cDlz3Lb7 for ; Thu, 13 Jan 2022 18:30:17 +0000 (UTC) (envelope-from glebius@freebsd.org) Received: from cell.glebi.us (localhost [127.0.0.1]) by cell.glebi.us (8.16.1/8.16.1) with ESMTPS id 20DIUAfB072603 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Thu, 13 Jan 2022 10:30:11 -0800 (PST) (envelope-from glebius@freebsd.org) Received: (from glebius@localhost) by cell.glebi.us (8.16.1/8.16.1/Submit) id 20DIUArG072602; Thu, 13 Jan 2022 10:30:10 -0800 (PST) (envelope-from glebius@freebsd.org) X-Authentication-Warning: cell.glebi.us: glebius set sender to glebius@freebsd.org using -f Date: Thu, 13 Jan 2022 10:30:10 -0800 From: Gleb Smirnoff To: Jamie Landeg-Jones Cc: net@freebsd.org Subject: Re: compressed TIME-WAIT to be decomissioned Message-ID: References: <202201131825.20DIP6AT072280@donotpassgo.dyslexicfish.net> List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <202201131825.20DIP6AT072280@donotpassgo.dyslexicfish.net> X-Rspamd-Queue-Id: 4JZXzY4cDlz3Lb7 X-Spamd-Bar: ++ Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=softfail (mx1.freebsd.org: 162.251.186.162 is neither permitted nor denied by domain of glebius@freebsd.org) smtp.mailfrom=glebius@freebsd.org X-Spamd-Result: default: False [2.90 / 15.00]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; FREEFALL_USER(0.00)[glebius]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; NEURAL_SPAM_SHORT(1.00)[1.000]; MIME_GOOD(-0.10)[text/plain]; HAS_XAW(0.00)[]; DMARC_NA(0.00)[freebsd.org]; R_SPF_SOFTFAIL(0.00)[~all]; NEURAL_SPAM_MEDIUM(1.00)[1.000]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_SPAM_LONG(1.00)[1.000]; MLMMJ_DEST(0.00)[net]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:27348, ipnet:162.251.186.0/24, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-ThisMailContainsUnwantedMimeParts: N 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