From owner-freebsd-questions@FreeBSD.ORG Mon Jun 9 22:11:17 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 DA1EB106567C for ; Mon, 9 Jun 2008 22:11:17 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from mail-out3.apple.com (mail-out3.apple.com [17.254.13.22]) by mx1.freebsd.org (Postfix) with ESMTP id C22768FC1C for ; Mon, 9 Jun 2008 22:11:17 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from relay12.apple.com (relay12.apple.com [17.128.113.53]) by mail-out3.apple.com (Postfix) with ESMTP id A00BE2E99C09; Mon, 9 Jun 2008 15:11:17 -0700 (PDT) Received: from relay12.apple.com (unknown [127.0.0.1]) by relay12.apple.com (Symantec Mail Security) with ESMTP id 8B0FA464002; Mon, 9 Jun 2008 15:11:17 -0700 (PDT) X-AuditID: 11807135-a91babb000000d04-15-484daa859e81 Received: from cswiger1.apple.com (cswiger1.apple.com [17.227.140.124]) by relay12.apple.com (Apple SCV relay) with ESMTP id 6D21D420005; Mon, 9 Jun 2008 15:11:17 -0700 (PDT) Message-Id: <740A26DF-8B8A-4FC7-A019-21EC12C38DDE@mac.com> From: Chuck Swiger To: Adam Bayless In-Reply-To: <484DAA11.1070909@baylessfamily.org> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v924) Date: Mon, 9 Jun 2008 15:11:17 -0700 References: <484D9C13.9090607@baylessfamily.org> <484DAA11.1070909@baylessfamily.org> X-Mailer: Apple Mail (2.924) X-Brightmail-Tracker: AAAAAA== Cc: Free BSD Questions list Subject: Re: Troubleshooting a 3Ware 9550SX under 6.3 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: Mon, 09 Jun 2008 22:11:18 -0000 On Jun 9, 2008, at 3:09 PM, Adam Bayless wrote: >> Caching is off; that will kill performance especially for small >> transactions. If you've got battery backup for this system, >> consider enabling the onboard cache...? > > Chuck, that made an immediate and huge difference: > > # tw_cli set cache c0 u0 on > # dd if=/dev/zero of=testfile > 5649235+0 records in > 5649234+0 records out > 2892407808 bytes transferred in 40.800142 secs (70892102 bytes/sec) > > I had no idea having the cache on would be such a night and day > difference. > > I'm off to order the battery backup card. > > Thanks!!! Excellent! I'm glad that resolved your performance issue, and you're most welcome.... -- -Chuck