From owner-freebsd-stable@FreeBSD.ORG Sat Mar 5 16:58:09 2005 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6417816A4CE for ; Sat, 5 Mar 2005 16:58:09 +0000 (GMT) Received: from wproxy.gmail.com (wproxy.gmail.com [64.233.184.205]) by mx1.FreeBSD.org (Postfix) with ESMTP id D6C9F43D3F for ; Sat, 5 Mar 2005 16:58:08 +0000 (GMT) (envelope-from marchenko@gmail.com) Received: by wproxy.gmail.com with SMTP id 69so916979wri for ; Sat, 05 Mar 2005 08:58:08 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:references; b=cPxS89/BB1r9oEh+mQytQX4pHF+uCsF+Xzxuh2yeOvCAN6MhDxMgLyc8HTvyROjMvc5+cEGdGW6NOcO1UBek3Ef6CbrV8smBZ7dMSNlR3Sh3SOaRvsWGxYuWy1ohilEbQTdlQmrJBRRn494D2gK4lT/fVpU8aYutsHsVe9Jmiuo= Received: by 10.54.49.31 with SMTP id w31mr62800wrw; Sat, 05 Mar 2005 08:58:08 -0800 (PST) Received: by 10.54.45.39 with HTTP; Sat, 5 Mar 2005 08:58:08 -0800 (PST) Message-ID: Date: Sat, 5 Mar 2005 11:58:08 -0500 From: Vlad To: Phil Brennan In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit References: cc: freebsd-stable@freebsd.org Subject: Re: performance under heavy load X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Vlad List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 05 Mar 2005 16:58:09 -0000 > On a highly linux machine, you lose all control of the machine past a load of about 6 - 10. to be fair, I should note that as admin / user of few tens of servers running both systems, I can assure you that if your linux "loses control" with LA ~ 10, then something is seriously wrong with that server and it's not because of the linux (rather it's hardware or wrong kernel configuration). I had cases of LA climbing over 150 on linux machine - it was extremely slow but I could get it back to life w/o need for reboot. On Sat, 5 Mar 2005 16:28:09 +0000, Phil Brennan wrote: > Hi, I'd just like to give some credit to the freebsd developers for a > job well done. > A user on our system ( freebsd 5.2.1 smp ) managed with a runaway > script to start up 500 intensive processes, raising the load average > to about 200. > We managed to remotely, over ssh get a somewhat responsive session and > kill the offending processes. Yes, I know we shouldn't have let it > happen in the first place, by putting in proper user limits and all > that, but it was amazing that the machine still worked. We thought > we'd have to reboot. Even with a load of nearly 200, the machine was > still able to serve web pages :) > Once the load came down past 60, the system feltl fully responsive again. > On linux, we would have had to reboot in this situation. On a highly > linux machine, you lose all control of the machine past a load of > about 6 - 10. This just further vindicates my decision to use freebsd > for this service. ( Its a shell server with about 100 active users, > apache, nfs, mysql, ldap ). Just wanted to share a success story :) > Regards, > > Philip Brennan > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > -- Vlad