From owner-freebsd-fs@FreeBSD.ORG Mon Jun 8 07:46:40 2009 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B6F9C106564A for ; Mon, 8 Jun 2009 07:46:40 +0000 (UTC) (envelope-from mat.macy@gmail.com) Received: from an-out-0708.google.com (an-out-0708.google.com [209.85.132.251]) by mx1.freebsd.org (Postfix) with ESMTP id 702878FC16 for ; Mon, 8 Jun 2009 07:46:40 +0000 (UTC) (envelope-from mat.macy@gmail.com) Received: by an-out-0708.google.com with SMTP id c3so1743936ana.13 for ; Mon, 08 Jun 2009 00:46:39 -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:date:x-google-sender-auth:message-id:subject:from:to:cc :content-type:content-transfer-encoding; bh=2HwtSS4BtBuXh6KK+yi8ifntJY78GyalQNwseS8aaaw=; b=PSLdslubxaGWILQ+fW/9CGYbpF1UMdEqscHPAPHdeM+a4EmQ5FQWq9603Ompwzvu3R 1GaHnu0Fk/Gw5R8qAKpUJZugOv3yBxbHNzV8se8uF6tTy02+yUnzt1zvoM1U8bNThYwf OFQHbnMFJC2dH94n5cYiKDwPYH77axB3kFwmc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=Wn9EHnFAbxuF+51/yTTGIJA7nslG/iMg+o6h5pqV2QggWaMOIa7qhSU//Rg6lXjg93 hrmAinpXWm05RASnAbmYBbqzBaCDyvrLaWvKmblvfl2YatdxXREReh8Lrr4wBK0fPLjp OEz0kvz/UmcJpXWO24FDjjA5xF29flTN4hGmk= MIME-Version: 1.0 Sender: mat.macy@gmail.com Received: by 10.100.38.5 with SMTP id l5mr5672916anl.119.1244447192291; Mon, 08 Jun 2009 00:46:32 -0700 (PDT) In-Reply-To: <20090608090123.13c21d5f@boiler.free.de> References: <4A2AA48B.20803@free.de> <20090608090123.13c21d5f@boiler.free.de> Date: Mon, 8 Jun 2009 00:46:31 -0700 X-Google-Sender-Auth: 24de28c7b6faf439 Message-ID: <3c1674c90906080046q1bdcafci7dc1b30df7a4a169@mail.gmail.com> From: Kip Macy To: Kai Gallasch Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-fs@freebsd.org Subject: Re: ZFS v13 performance drops with low memory on FreeBSD-7 STABLE X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jun 2009 07:46:41 -0000 The inactive queue can cause the ARC to be shrunk down to almost nothing. This is in need of fixing. Cheers, Kip On Mon, Jun 8, 2009 at 12:01 AM, Kai Gallasch wrote: > On Mon, 08 Jun 2009 02:55:22 +0200 > wrote Ivan Voras : > >> Kai Gallasch wrote: >> > Hi. >> > >> > So for me this looks like when running applications and ZFS compete >> > for free RAM, ZFS looses. Is that so? >> >> Yes, that was the point of recent work in stabilizing ZFS - without it >> you would probably panic. With it, ZFS's memory is shrunk down. Unless >> there are other factors (like swapping; are you swapping on ZFS?), >> this is the probable reason for what you're seeing. > > No. Swapspace is on a standard swap partition outside the zpool. > # swapinfo > Device =A0 =A0 =A0 =A0 =A01K-blocks =A0 =A0 Used =A0 =A0Avail Capacity > /dev/da0s3b =A0 =A0 =A0 8388608 =A0 =A011636 =A08376972 =A0 =A0 0% > > There's barely swapping taking place on the server. > > --Kai. > > > --=20 When bad men combine, the good must associate; else they will fall one by one, an unpitied sacrifice in a contemptible struggle. Edmund Burke