From owner-freebsd-questions@FreeBSD.ORG Sun Sep 28 14:21:38 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 DFE111065695 for ; Sun, 28 Sep 2008 14:21:38 +0000 (UTC) (envelope-from dak.col@gmail.com) Received: from wf-out-1314.google.com (wf-out-1314.google.com [209.85.200.168]) by mx1.freebsd.org (Postfix) with ESMTP id B29048FC2B for ; Sun, 28 Sep 2008 14:21:38 +0000 (UTC) (envelope-from dak.col@gmail.com) Received: by wf-out-1314.google.com with SMTP id 24so1668651wfg.7 for ; Sun, 28 Sep 2008 07:21:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=3VEgXlCvuMISi6mnS1onLh9lfBbZhZ7+Xi29dNSOq0M=; b=o70OQSFnWkO7B87FpRLH0Nd/ZaMbaRYm+E2RvMr41BdtriDuzHPnzaQsJFLznqioOn h0SEHINyXc4nx4sHUs9wlXAH/M+dPNisn02mxq8MRveaewTMAmZBFIgR2Ei/nMQzNhat AiJ11Q6Ze+UTpBj2qgWJHX7RyoQxVSf+/Tf24= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=g2v5qXjU4BfOrQZFz3u4fSg3NUQguUBj9TaytZRODPXfeSponn2Mpuqj00Dswbq7fR j4bUyoZRKC8+eJE69V/Q5bIwZBJakUwk/yTWy+cfFMbzhw+6dY8/rmt4xhdlD5UfbSAr UnXMlJ3+6pF0zM6OKb3MiG3tchPNs0eUGBbzk= Received: by 10.142.70.11 with SMTP id s11mr1670094wfa.293.1222611698435; Sun, 28 Sep 2008 07:21:38 -0700 (PDT) Received: by 10.142.240.12 with HTTP; Sun, 28 Sep 2008 07:21:38 -0700 (PDT) Message-ID: <3b93bd110809280721g7c4a27afkc39649996c1a3cf8@mail.gmail.com> Date: Sun, 28 Sep 2008 09:21:38 -0500 From: "Diego F. Arias R." To: "Bill Moran" In-Reply-To: <20080928095436.3c9783c2.wmoran@potentialtech.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <00d101c92154$691f53c0$3b5dfb40$@com> <20080928095436.3c9783c2.wmoran@potentialtech.com> Cc: freebsd-questions@freebsd.org, Danny Do Subject: Re: Hard disk bottle neck. 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: Sun, 28 Sep 2008 14:21:39 -0000 First be shure your bottleneck are the hard drives. On Sun, Sep 28, 2008 at 8:54 AM, Bill Moran wrote: > "Danny Do" wrote: >> >> Hi guys, >> >> I have this problem for years but couldn't find a way to solve it. >> >> I have a file server handling large files from 1MByte to 1GByte. >> >> Server Info: >> FreeBSD 6.2 >> Apache 2.2.9 >> >> DELL PowerEdge 1850 >> 2GB RAM (only 184MB is active) >> 6x300MB SCSI 10K RPM RAID5 >> Gigabit Ethernet Connection >> >> My server can output NO MORE than 60Mbps (read only). >> >> The bottle neck is the hard disk. > > What evidence do you have that the bottleneck is disk IO? I've seen no > evidence, only speculation. > > In addition to the advice of others, you may be able to just beef up the > RAM. 2G isn't much these days. If you've got 200M active, you've got > about 1.8G available to cache files. If you have repeated access of the > same file, the OS can cache that file data and not even use the disk, but > it can only do that if it has enough RAM to work with. You need to get > your facts straight, though. According to the specs you've got above, > you've only got 1.5G of disk. I expect you meant 300G disks. > > You could also add disks in a RAID 10, which is generally faster than > RAID 5, or move to 15,000 RPM disks. I think you might be surprised how > much adding some RAM will help, though, unless your access patterns are > very random, RAM should speed up the access of popular data significantly. > > -- > Bill Moran > http://www.potentialtech.com > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" > -- mmm, interesante.....