From owner-freebsd-questions@FreeBSD.ORG Fri May 9 17:33:14 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A673C1065680 for ; Fri, 9 May 2008 17:33:14 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (gate6.infracaninophile.co.uk [IPv6:2001:8b0:151:1::1]) by mx1.freebsd.org (Postfix) with ESMTP id 20EB88FC0C for ; Fri, 9 May 2008 17:33:13 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from happy-idiot-talk.infracaninophile.co.uk (localhost [IPv6:::1]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.2/8.14.2) with ESMTP id m49HX2u3032616; Fri, 9 May 2008 18:33:08 +0100 (BST) (envelope-from m.seaman@infracaninophile.co.uk) X-DKIM: Sendmail DKIM Filter v2.5.5 smtp.infracaninophile.co.uk m49HX2u3032616 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=infracaninophile.co.uk; s=200708; t=1210354388; bh=1A7BJCARwuWMrT THiNxJtLu+hb5MrTSl+EzNLAjqtWc=; h=Message-ID:Date:From:MIME-Version: To:CC:Subject:References:In-Reply-To:Content-Type:Cc:Content-Type: Date:From:In-Reply-To:Message-ID:Mime-Version:References:To; z=Mes sage-ID:=20<48248AC9.5060507@infracaninophile.co.uk>|Date:=20Fri,=2 009=20May=202008=2018:32:57=20+0100|From:=20Matthew=20Seaman=20|Organization:=20Infracaninophile|User -Agent:=20Thunderbird=202.0.0.14=20(X11/20080503)|MIME-Version:=201 .0|To:=20DAve=20|CC:=20'User=20Questions '=20|Subject:=20Re:=20FBSD=206.2=20X eon=202.4ghz=20CPU=20and=20high=20load|References:=20<482473B7.7070 707@pixelhammer.com>|In-Reply-To:=20<482473B7.7070707@pixelhammer.c om>|X-Enigmail-Version:=200.95.6|Content-Type:=20multipart/signed=3 B=20micalg=3Dpgp-sha256=3B=0D=0A=20protocol=3D"application/pgp-sign ature"=3B=0D=0A=20boundary=3D"------------enigA4D207F10AB9297668CFB AE6"; b=Db6Tu9pFyEW3Db49k3UbLtVblaE4FFWLYEI6cO8TGS0eK4ZOiZkkaDDudkF 14pGPthlCthTgyEbMlSwmlkKp8aDJWDnrXqJWHdNNyiTu3k7SmtdH4f8UXzWH+FYLHi XPOvc9Cy8znl5o3WRAxMXKi5VYyvax8vIkZlx8YD7uDV8= Message-ID: <48248AC9.5060507@infracaninophile.co.uk> Date: Fri, 09 May 2008 18:32:57 +0100 From: Matthew Seaman Organization: Infracaninophile User-Agent: Thunderbird 2.0.0.14 (X11/20080503) MIME-Version: 1.0 To: DAve References: <482473B7.7070707@pixelhammer.com> In-Reply-To: <482473B7.7070707@pixelhammer.com> X-Enigmail-Version: 0.95.6 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enigA4D207F10AB9297668CFBAE6" X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0 (smtp.infracaninophile.co.uk [IPv6:::1]); Fri, 09 May 2008 18:33:08 +0100 (BST) X-Virus-Scanned: ClamAV version 0.93, clamav-milter version 0.93 on happy-idiot-talk.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-3.0 required=5.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VERIFIED,NO_RELAYS autolearn=ham version=3.2.4 X-Spam-Checker-Version: SpamAssassin 3.2.4 (2008-01-01) on happy-idiot-talk.infracaninophile.co.uk Cc: 'User Questions' Subject: Re: FBSD 6.2 Xeon 2.4ghz CPU and high load X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 May 2008 17:33:14 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigA4D207F10AB9297668CFBAE6 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable DAve wrote: > Good morning. >=20 > I recently upgraded our two email gateways from 4.8 to 6.2. The require= d=20 > software was upgraded as well which consists of MailScanner and=20 > Sendmail. Both had been keep up to date so it was not a jump in require= d=20 > resources. >=20 > The issue I am seeing is that my server load, under the same traffic=20 > load, has increased 4 times or more. Where previously we saw a high loa= d=20 > on the servers of 5 to 8, we are now seeing 14 to 17. Since the upgrade= =20 > Sendmail has begun to timeout connections. FreeBSD 6.2 is I believe slower than 4.11 for single processor systems and processes which pretty much run single threaded -- ie. exactly what you're trying to run. This would cause exactly the sort of symptoms you'= re seeing. Try 7.0 instead -- it has all of the speed at multi-threaded, multi-core type stuff but has also regained the sort of performance levels you could= get from 4.x at the sort of tasks 4.x is really good at. You should eval= uate SCHED_4BSD vs. SCHED_ULE for your workload. SCHED_4BSD is still the defa= ult in 7.0, but SCHED_ULE gives better numbers for many workloads, and it onl= y missed being the default in 7.0 because it hadn't had enough time to sett= le into the tree before the release. SCHED_ULE will be the default from 7.1= onwards. Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW --------------enigA4D207F10AB9297668CFBAE6 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEAREIAAYFAkgkis4ACgkQ8Mjk52CukIwdrACeKgm2pYmzkQ2N1I0oYMH41l1i CUIAn1u/Fm0uIsP9oy67/mqdPceqBcmI =XJIq -----END PGP SIGNATURE----- --------------enigA4D207F10AB9297668CFBAE6--