From owner-freebsd-questions@FreeBSD.ORG Wed Dec 28 09:29:07 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F37EC16A41F for ; Wed, 28 Dec 2005 09:29:06 +0000 (GMT) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (smtp.infracaninophile.co.uk [81.187.76.162]) by mx1.FreeBSD.org (Postfix) with ESMTP id C13A643D5A for ; Wed, 28 Dec 2005 09:29:04 +0000 (GMT) (envelope-from m.seaman@infracaninophile.co.uk) Received: from [IPv6:::1] (localhost [IPv6:::1]) by smtp.infracaninophile.co.uk (8.13.4/8.13.4) with ESMTP id jBS9SnXh018643; Wed, 28 Dec 2005 09:28:50 GMT (envelope-from m.seaman@infracaninophile.co.uk) Message-ID: <43B25ACB.8010209@infracaninophile.co.uk> Date: Wed, 28 Dec 2005 09:28:43 +0000 From: Matthew Seaman Organization: Infracaninophile User-Agent: Mozilla Thunderbird 1.0.7 (X11/20051221) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Chuck Swiger References: <20051227211433.J1087@ganymede.hub.org> <43B2069B.2000302@mac.com> In-Reply-To: <43B2069B.2000302@mac.com> X-Enigmail-Version: 0.93.0.0 Content-Type: multipart/signed; micalg=pgp-ripemd160; protocol="application/pgp-signature"; boundary="------------enig8B6881266714BDB20380B9FE" X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.0.2 (smtp.infracaninophile.co.uk [IPv6:::1]); Wed, 28 Dec 2005 09:28:50 +0000 (GMT) X-Virus-Scanned: ClamAV 0.87.1/1218/Mon Dec 26 13:46:59 2005 on happy-idiot-talk.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,NO_RELAYS autolearn=ham version=3.1.0 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on happy-idiot-talk.infracaninophile.co.uk Cc: "Marc G. Fournier" , freebsd-questions@freebsd.org Subject: Re: "Load Balancing": How Busy are the servers? 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: Wed, 28 Dec 2005 09:29:07 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig8B6881266714BDB20380B9FE Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Chuck Swiger wrote: > Marc G. Fournier wrote: >> Basically, I'd like to keep track of multiple servers and be able to >> say "this server is running >75% of capacity, time to upgrade or move >> things off of it" ... if its possible ... ? > Take a look at Big Brother, www.bb4.org?, it will at least give warnings > for high load average, disk space, and so forth. Yep -- BB, or for my preference, Nagios is good, but by their nature they alert you to abnormal conditions -- peaks in load or traffic, failure of connectivity etc. That's important, but it doesn't really help with getting an overview of how hard a server is running over time. For that purpose I find that programs like Cacti or Cricket do much better. Essentially anything you can express as a number and that you can get a SNMP daemon to present as an OID can be graphed. Cacti comes with pre-canned queries on system load, disk space, memory usage, swap usage, number of processes, as well as graphing all of the network traffic. Adding extensions to do stuff like monitor how much work MySQL is doing is not too difficult. Not only that, it produces graphs pretty enough to convince even the pointiest-haired management. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW --------------enig8B6881266714BDB20380B9FE Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDslrR8Mjk52CukIwRA4KuAJ4rZXaGEoFxp46DuAAX03B8NPmrOgCeOqxK fgcmAH5E4g71sFC/Fz/HpdM= =+wud -----END PGP SIGNATURE----- --------------enig8B6881266714BDB20380B9FE--