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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=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



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