From owner-freebsd-fs@FreeBSD.ORG Thu Apr 8 03:44:32 2010 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 C81621065677 for ; Thu, 8 Apr 2010 03:44:32 +0000 (UTC) (envelope-from rincebrain@gmail.com) Received: from mail-gx0-f211.google.com (mail-gx0-f211.google.com [209.85.217.211]) by mx1.freebsd.org (Postfix) with ESMTP id 7F20D8FC14 for ; Thu, 8 Apr 2010 03:44:32 +0000 (UTC) Received: by gxk3 with SMTP id 3so931131gxk.13 for ; Wed, 07 Apr 2010 20:44:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:received:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=VdvCyBiUEGCZGKd4u6oNAW5BKYHmFJmTfjMtjGP0eMI=; b=v8C9Pf3G1qzBNHSYw53NYnMF4WRC+lnTt1OQkzWLorJQlZhv8f0kjSwupG7Bsxt/yK FLyAp8fclrn4LCNxONYnVhrxqIkVlONpFfkDeYSEqN3UTzn4dtnTxhK0JqSORYvK0B4/ gQjckbCoFJ1GrJS7/ktOm7xFZpstXi9MV/dd8= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=ELOIJ/GfJVucWJEz0pVJ8qItiYkUM1aTVysq7HAPXLuLbif3Vauw5SS56IQoed3qq3 hf3fMaxOID6Dvu1GE3uedoXpDMEvJYPL6c1GcYsCQoDQ0gtLxsCK5GLLD6PVeXgV93sH R5YmCEx5aGWFdki7GS3NpujtpR8I/5dx6IT1w= MIME-Version: 1.0 Received: by 10.231.60.197 with HTTP; Wed, 7 Apr 2010 20:44:31 -0700 (PDT) In-Reply-To: <20100408033630.GA69748@icarus.home.lan> References: <4BBD15E7.5010006@xpam.de> <20100408033630.GA69748@icarus.home.lan> Date: Wed, 7 Apr 2010 23:44:31 -0400 Received: by 10.150.194.2 with SMTP id r2mr2103126ybf.92.1270698271712; Wed, 07 Apr 2010 20:44:31 -0700 (PDT) Message-ID: From: Rich To: Jeremy Chadwick Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-fs@freebsd.org Subject: Re: ZFS arc sizing (maybe related to kern/145229) 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: Thu, 08 Apr 2010 03:44:32 -0000 vm.kmem_size_scale: 3 vm.kmem_size_max: 329853485875 vm.kmem_size_min: 0 vm.kmem_size: 5033164800 - Rich On Wed, Apr 7, 2010 at 11:36 PM, Jeremy Chadwick wrote: > On Wed, Apr 07, 2010 at 11:25:57PM -0400, Rich wrote: >> kstat.zfs.misc.arcstats.memory_throttle_count: 673016 >> >> Since UFS has no files of any reasonable size on it (it's literally >> just rootFS)... >> >> ... >> >> > Rich wrote: >> >> >> >> =A0 =A0 =A0 =A0vfs.zfs.arc_meta_limit=3D1073741824 >> >> =A0 =A0 =A0 =A0vfs.zfs.arc_meta_used=3D548265792 >> >> =A0 =A0 =A0 =A0vfs.zfs.arc_min=3D536870912 >> >> =A0 =A0 =A0 =A0vfs.zfs.arc_max=3D3221225472 >> >> >> >> So it very clearly limits to near the minimum size, but whether this >> >> is design or accidental behavior, I'm unsure. > > I don't see a vm.kmem_size entry in there, so I can't see how you're > going to reach arc_max ever. > > -- > | Jeremy Chadwick =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 jdc@parodius.com | > | Parodius Networking =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 http://= www.parodius.com/ | > | UNIX Systems Administrator =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Mountain = View, CA, USA | > | Making life hard for others since 1977. =A0 =A0 =A0 =A0 =A0 =A0 =A0PGP:= 4BD6C0CB | > >