Date: Sun, 23 Sep 2012 19:35:09 +0400 From: Andrey Zonov <zont@FreeBSD.org> To: "Eggert, Lars" <lars@netapp.com> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: [patch] sysctls for TCP timers Message-ID: <505F2C2D.5050904@FreeBSD.org> In-Reply-To: <D4D47BCFFE5A004F95D707546AC0D7E906888619@SACEXCMBX01-PRD.hq.netapp.com> References: <505AC500.6060903@FreeBSD.org> <D4D47BCFFE5A004F95D707546AC0D7E906888619@SACEXCMBX01-PRD.hq.netapp.com>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig820D10D9530C18AC3549AFD4 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 9/20/12 11:35 AM, Eggert, Lars wrote: > Hi, >=20 > On Sep 20, 2012, at 9:25, Andrey Zonov <zont@freebsd.org> wrote: >> Some of them may be read google's article about tuning TCP parameters >> [1]. I convert most of TCP timers to sysctls [2] and we are using thi= s >> patch for few months. We tuned net.inet.tcp.rtobase and >> net.inet.tcp.syncache.rexmttime and it gives good results (especially = in >> conjunction with cc_htcp(4)). >=20 > can you share some measurements that quantify the results? >=20 When we set net.inet.tcp.syncache.rexmttime=3D200 and net.inet.tcp.syncache.rexmtlimit=3D7 for our external web service, the number of duplicated SYN was reduced in four times. --=20 Andrey Zonov --------------enig820D10D9530C18AC3549AFD4 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.18 (Darwin) Comment: GPGTools - http://gpgtools.org iQEcBAEBAgAGBQJQXywwAAoJEBWLemxX/CvTuoQH/1b0a2TTuiQ+t/c65FBBcRG1 oQvAEf9T+aT1yxB603+itGu9iS+Rf775E4TwpkNEBOOfPY2qjzsH/L2UB+by2HL8 JwvVizXMfZgqmHR7U0HoXWN8isiYng1aA7SVSCVZdZz7ZeLXehNdGA0BGHj8ZO3M XUiI6Pq9wnH1wSIYBSPHsFCOqBX06390/yxJUS55Twq4pICamaVu8xDcrOLSl9hu kQw4bErBHyDm0x96H/GLPy5Fh5YMUlFSuLi/eZRCb8ytqeWFLEyLvRFT4lGWhhi8 k5qq9tTTGaobHQOtOpd+pVYLu3ZlR1Y/zQW9/KAvbpsHFlIQaiIztw36X2srV+M= =4g0B -----END PGP SIGNATURE----- --------------enig820D10D9530C18AC3549AFD4--
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