From owner-freebsd-questions@FreeBSD.ORG Mon May 4 00:07:56 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 A9A33106566C for ; Mon, 4 May 2009 00:07:56 +0000 (UTC) (envelope-from andrewdg@gmail.com) Received: from wf-out-1314.google.com (wf-out-1314.google.com [209.85.200.175]) by mx1.freebsd.org (Postfix) with ESMTP id 7B88E8FC12 for ; Mon, 4 May 2009 00:07:56 +0000 (UTC) (envelope-from andrewdg@gmail.com) Received: by wf-out-1314.google.com with SMTP id 24so2398439wfg.7 for ; Sun, 03 May 2009 17:07:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:from:date:x-google-sender-auth:message-id:subject:to:cc :content-type:content-transfer-encoding; bh=zvg1imddx6ohQ52GC8Qk0/Yp3GYvWeh4/HMK3Lw+H6E=; b=QUfX1ZSrp7jmdhwDAunAvqypbsFiCecnLgsxsvGFV9jA9lc1+Np9M8ZRcQ32gBC+NO smNrxp0Mk58zvnd2RiL9KBrGyjQf7d8Wh0ZSV7bKFP2rYuNnRuxgn1ktjrw2tYjHvF/A g6kV/6j8ku1huTlY7PoMbGQg57W9qjzOK8aKs= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:cc:content-type :content-transfer-encoding; b=Y55RdfIChnBxGCXMbF/d138jznMIcabAFhLBN5lm+pTLNa576NPNgKWYVRa9YTeaf+ TcWJudr1l0JEcwOEz9PS49WcBbslr4fIR22hwOdnQwGY0A9rVL4lzlIrKGbo9MmxJz2/ XAhj1Ki2TknCfHh/1NPrERkVhVYUva0XeU+28= MIME-Version: 1.0 Sender: andrewdg@gmail.com Received: by 10.142.100.1 with SMTP id x1mr1851440wfb.256.1241395676063; Sun, 03 May 2009 17:07:56 -0700 (PDT) In-Reply-To: <49FC10DE.9000401@isafeelin.org> References: <49FC10DE.9000401@isafeelin.org> From: nf Date: Mon, 4 May 2009 10:07:41 +1000 X-Google-Sender-Auth: 7bf11e7bb19a22dc Message-ID: To: Frederique Rijsdijk Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: Poor ZFS 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: Mon, 04 May 2009 00:07:56 -0000 On Sat, May 2, 2009 at 7:22 PM, Frederique Rijsdijk wrote: > nf wrote: >> >> 733843456 bytes transferred in 61.124812 secs (12005656 bytes/sec) > > That is very low. I get about 60MB/sec in this way. Adding bs=1m it'll go up > to 240MB/sec even (raidz1 with 4*1TB). > > Could you show top -S ? I will, the next time I experience the issue. I had already rebooted the box, which immediately alleviated the issue. I can only presume, at this point, that it seems to have been related to the 2gb of allocated/active memory shown by top. I had no memory intensive apps running, merely an idle lighttpd, mysqld, and rtorrent (which only occupied about 90mb). Thanks, Andrew