From owner-freebsd-questions@FreeBSD.ORG Tue Jun 16 07:13:43 2015 Return-Path: Delivered-To: freebsd-questions@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id DA023B74 for ; Tue, 16 Jun 2015 07:13:43 +0000 (UTC) (envelope-from raimund.sacherer@logitravel.com) Received: from formentor.toolfactory.net (pina.toolfactory.net [213.97.158.39]) by mx1.freebsd.org (Postfix) with ESMTP id 812E11C0 for ; Tue, 16 Jun 2015 07:13:43 +0000 (UTC) (envelope-from raimund.sacherer@logitravel.com) Received: from localhost (localhost.localdomain [127.0.0.1]) by formentor.toolfactory.net (Postfix) with ESMTP id D38A6177A46; Tue, 16 Jun 2015 09:13:41 +0200 (CEST) Received: from formentor.toolfactory.net ([127.0.0.1]) by localhost (formentor.toolfactory.net [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id XwTQsXbNm_4T; Tue, 16 Jun 2015 09:13:41 +0200 (CEST) Received: from localhost (localhost.localdomain [127.0.0.1]) by formentor.toolfactory.net (Postfix) with ESMTP id 834A31778D1; Tue, 16 Jun 2015 09:13:41 +0200 (CEST) X-Virus-Scanned: amavisd-new at logpmzimmta01v.toolfactory.net Received: from formentor.toolfactory.net ([127.0.0.1]) by localhost (formentor.toolfactory.net [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id e-dP8wbyYFLr; Tue, 16 Jun 2015 09:13:41 +0200 (CEST) Received: from xorrigo.toolfactory.net (xorrigo.toolfactory.net [192.168.2.210]) by formentor.toolfactory.net (Postfix) with ESMTP id 65C3517798B; Tue, 16 Jun 2015 09:13:41 +0200 (CEST) Date: Tue, 16 Jun 2015 09:13:40 +0200 (CEST) From: Raimund Sacherer Reply-To: Raimund Sacherer To: "Chad Leigh Shire.Net LLC" Cc: freebsd-questions@freebsd.org Message-ID: <485432824.11228956.1434438820497.JavaMail.zimbra@logitravel.com> In-Reply-To: References: <9C96EB4B-A230-4A26-BDC3-067367A61E34@shire.net> <378461483.10441535.1434361136704.JavaMail.zimbra@logitravel.com> Subject: Re: ZFS in a VM? MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [192.168.2.213] X-Mailer: Zimbra 8.0.8_GA_6184 (ZimbraWebClient - SAF7 (Mac)/8.0.8_GA_6184) Thread-Topic: ZFS in a VM? Thread-Index: CIw1WvQi1sdr/lCk3la4b1jy7briVw== X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Jun 2015 07:13:43 -0000 > Good morning. You don=E2=80=99t want to go start mucking with sysctl leve= l things > until you have identified issues. Each installation is different, especia= lly > inside a VM. For example, ours are not VMWare based and probably perform > totally differently at the level ZFS uses. Try a stock install and see wh= at > issues you run up against. Good morning to you to :-) Yeah, I thought there may be some recommended tuneables for ZFS in a virtua= lised setting. I read about problems with ARC cache size on low memory / lo= w free memory systems which could lead to a panic if the ARC size grows to = some kernel memory limit, so restricting the ARC cache size may be needed. = But you are right, it seems I just have to throw myself in to the water and= find out if I can swim.=20 Thank you, Best Ray