From owner-freebsd-questions@FreeBSD.ORG Thu Feb 5 05:55:02 2009 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 1E4A0106566B for ; Thu, 5 Feb 2009 05:55:02 +0000 (UTC) (envelope-from tajudd@gmail.com) Received: from rn-out-0910.google.com (rn-out-0910.google.com [64.233.170.190]) by mx1.freebsd.org (Postfix) with ESMTP id C5B2A8FC13 for ; Thu, 5 Feb 2009 05:55:01 +0000 (UTC) (envelope-from tajudd@gmail.com) Received: by rn-out-0910.google.com with SMTP id k32so49301rnd.12 for ; Wed, 04 Feb 2009 21:55:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from :user-agent:mime-version:to:cc:subject:references:in-reply-to :content-type:content-transfer-encoding; bh=01I1wa2wnYtd/x/6QXh3pb2xETI5X7vS3LbF3/BSK/A=; b=N1JTh9qKd7w7X+7U4WSighSTFVj71XR8jOz3nmBXbp50Oe/lz1dkh7sESkSW9Bq6iL 1zLg32tYUWkmZCViLgQahLGJ3lIeIPm7UfzuBuTX9SmFzY8bYX1ELjqm4q11E0z2TRYF EGme/lcZo4VZKccpsuL9Koig6trJYM83mNSKU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=tFet8AGJWSzNg6KY3YRMCUUgc0E8cVEYR0ZYRrBbe8pNGoEHAI0MykSoKpLK+Wc+Ys dXQ/fkkjC5S8ia7fY6miV6AYOiTyC9FgVlPYlRAGgZgUDKYqHyVbQyuxyd7yXXQOz1vc BtKpJXIH2JO8FluHCDPKrZfY85EBPqa2+rjZM= Received: by 10.65.135.19 with SMTP id m19mr99121qbn.77.1233813300947; Wed, 04 Feb 2009 21:55:00 -0800 (PST) Received: from ?192.168.4.70? ([72.14.241.160]) by mx.google.com with ESMTPS id p9sm475317qbp.4.2009.02.04.21.54.59 (version=SSLv3 cipher=RC4-MD5); Wed, 04 Feb 2009 21:55:00 -0800 (PST) Message-ID: <498A7F31.30206@gmail.com> Date: Wed, 04 Feb 2009 22:54:57 -0700 From: Tim Judd User-Agent: Thunderbird 2.0.0.19 (Windows/20081209) MIME-Version: 1.0 To: Yavuz References: <1E37AE87F15C4E34B6EB1002AADEB87A@desktop2002> In-Reply-To: <1E37AE87F15C4E34B6EB1002AADEB87A@desktop2002> Content-Type: text/plain; charset=ISO-8859-9; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: is there any way to increase disk performance ? 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: Thu, 05 Feb 2009 05:55:02 -0000 Yavuz wrote: > I have freebsd7 (amd64 bit) and sata2 disk 7200 rpm. > > it's running mail server which has services like pop3,imap,smtp and > webmail on this machine. > > When I type systat 1 -vmstat on command line, even I rarely see that > disk usage hits 100%. > I have no problem as ram and cpu. they is enough. > > is there any way to increase disk performance without causing any problem ? > So in one second, the disk hits 100% utilization, weather it's reading or writing data to disk. You said above that "I rarely see" -- so even though, as a server, you're running slow spindles, you are doing pretty good. I've no real experience with a site that's (for example) been slashdotted, to test what is tolerable, and what's not. But as I currently guess, an OVERALL average between 25% to 33% is about as much as I would ever tax a server for CONSISTENT averages. So if you're seeing it rarely, such as when somebody hits webmail and takes 1 second of constant disk read to serve the content, I'd be happy there... I don't think you have a problem, when you put your concern into the broader scope of 1 minute, 1 hour, 1 day or 1 week. It'll be very difficult to never see 100% in 1 second no matter how powerful the machine is. HTH --Tim