From owner-freebsd-stable@FreeBSD.ORG Fri Nov 6 20:08:28 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7A10D106568B for ; Fri, 6 Nov 2009 20:08:28 +0000 (UTC) (envelope-from mloftis@wgops.com) Received: from juggler.wgops.com (juggler.wgops.com [204.11.247.41]) by mx1.freebsd.org (Postfix) with ESMTP id 51EE78FC1D for ; Fri, 6 Nov 2009 20:08:28 +0000 (UTC) Received: by juggler.wgops.com (Postfix, from userid 65534) id F02A0A810F; Fri, 6 Nov 2009 12:51:52 -0700 (MST) X-Spam-ASN: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on juggler.wgops.com X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=ALL_TRUSTED, SARE_SUB_OBFU_OTHER autolearn=no version=3.2.5 Received: from [192.168.1.44] (host-72-174-39-176.msl-mt.client.bresnan.net [72.174.39.176]) by juggler.wgops.com (Postfix) with ESMTPSA id 2ABA9A8070 for ; Fri, 6 Nov 2009 12:51:51 -0700 (MST) Date: Fri, 06 Nov 2009 12:51:56 -0700 From: Michael Loftis To: freebsd-stable@freebsd.org Message-ID: In-Reply-To: <4AEEBD4B.1050407@quip.cz> References: <772532900-1257123963-cardhu_decombobulator_blackberry.rim.net-1402739480-@bda715.bisx.prod.on.blackberry> <4AEEBD4B.1050407@quip.cz> X-Mailer: Mulberry/4.0.8 (Win32) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Virus-Scanned: clamav-milter 0.95.2 at juggler X-Virus-Status: Clean Subject: Re: Performance issues with 8.0 ZFS and sendfile/lighttpd X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Nov 2009 20:08:28 -0000 --On Monday, November 02, 2009 12:06 PM +0100 Miroslav Lachman <000.fbsd@quip.cz> wrote: > I have more strange issue with Lighttpd in jail on top of ZFS. Lighttpd > is serving static content (mp3 downloads thru flash player). Is runs fine > for relatively small number of parallel clients with bandwidth about 30 > Mbps, but after some number of clients is reached (about 50-60 parallel > clients) the throughput drops down to 6 Mbps. > > I can server hundereds of clients on same HW using Lighttpd not in jail > and UFS2 with gjournal instead of ZFS reaching 100 Mbps (maybe more). > > I don't know if it is ZFS or Jail issue. Check iostat 5 or zpool iostat 5 -- I bet you're disk thrashing when you start to slow down.