Date: Tue, 16 Jun 2015 09:13:40 +0200 (CEST) From: Raimund Sacherer <rs@logitravel.com> To: "Chad Leigh Shire.Net LLC" <chad@shire.net> Cc: freebsd-questions@freebsd.org Subject: Re: ZFS in a VM? Message-ID: <485432824.11228956.1434438820497.JavaMail.zimbra@logitravel.com> In-Reply-To: <E8C14DEE-2BD2-4A6A-AE36-9A274FF59CAD@shire.net> References: <CA%2Bsg5RQgF7%2BAQu9P0Bt8USF8722QCi=qJ2XQ8RbNQ92cv9tNTg@mail.gmail.com> <9C96EB4B-A230-4A26-BDC3-067367A61E34@shire.net> <378461483.10441535.1434361136704.JavaMail.zimbra@logitravel.com> <E8C14DEE-2BD2-4A6A-AE36-9A274FF59CAD@shire.net>
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> Good morning. You don’t want to go start mucking with sysctl level things > until you have identified issues. Each installation is different, especially > 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 what > issues you run up against. Good morning to you to :-) Yeah, I thought there may be some recommended tuneables for ZFS in a virtualised setting. I read about problems with ARC cache size on low memory / low 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. Thank you, Best Ray
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