From owner-freebsd-performance@FreeBSD.ORG Thu Jun 14 11:07:26 2007 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id DA12116A468 for ; Thu, 14 Jun 2007 11:07:26 +0000 (UTC) (envelope-from tec@mega.net.br) Received: from msrv.matik.com.br (msrv.matik.com.br [200.152.83.14]) by mx1.freebsd.org (Postfix) with ESMTP id 68BBC13C483 for ; Thu, 14 Jun 2007 11:07:26 +0000 (UTC) (envelope-from tec@mega.net.br) Received: from ap-h.matik.com.br (ap-h.matik.com.br [200.152.83.36]) by msrv.matik.com.br (8.14.1/8.13.1) with ESMTP id l5EB7QE4081106 for ; Thu, 14 Jun 2007 08:07:26 -0300 (BRT) (envelope-from tec@mega.net.br) From: NOC Meganet Organization: Prowip Telecom Ltda To: freebsd-performance@freebsd.org Date: Thu, 14 Jun 2007 08:06:05 -0300 User-Agent: KMail/1.9.6 References: <4671118D.1040404@bsdunix.ch> In-Reply-To: <4671118D.1040404@bsdunix.ch> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200706140806.05674.tec@mega.net.br> X-Virus-Scanned: ClamAV version 0.90.3, clamav-milter version 0.90.3 on msrv.matik.com.br X-Virus-Status: Clean Subject: Re: PAPI in the ports X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Jun 2007 11:07:26 -0000 On Thursday 14 June 2007 06:59:41 Thomas Vogt wrote: > Hi > > Thats sounds nice. You wrote "The goal of the PmcTools project is to > provide FreeBSD's developers and system administrators with > non-intrusive, low-overhead and innovative ways of measuring and > analysing system performance" your website. Have you ever measured the > performance impact of such tools? > > I'm interested to run such tool on production machines in the future but > only if the performance impact isn't that high. > Hi ... even if the tool (whatever it is) does not require much system resources it triggers processes in order to measure their or the system's performance. So long as you do not push the system to or over the edge you might not get valuable numbers. So I mean, any performance measuring does or must stress the system. That is at least my understanding. So probably running performance tests on a production server is not the very best idea. HM -- Prowip Telecom Ltda AS 22706 A mensagem foi scaneada pelo sistema de e-mail e pode ser considerada segura. Service fornecido pelo Datacenter Matik https://datacenter.matik.com.br