Skip site navigation (1)Skip section navigation (2)
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>

next in thread | previous in thread | raw e-mail | index | archive | help
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--



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?505F2C2D.5050904>