Skip site navigation (1)Skip section navigation (2)
Date:      Wed, 11 Aug 2010 06:09:10 +0000
From:      Marco van Tol <marco@tols.org>
To:        freebsd-fs@freebsd.org
Subject:   Re: zfs arc - just take it all and be good to me
Message-ID:  <20100811060910.GA34883@tolstoy.tols.org>
In-Reply-To: <AANLkTi=BMXOnmT2CWBn62ysnQrAKcDq5EkAh-zYpM=9Q@mail.gmail.com>
References:  <20100810214418.GA28288@tolstoy.tols.org> <4C61F9CB.1010506@ukr.net> <AANLkTi=BMXOnmT2CWBn62ysnQrAKcDq5EkAh-zYpM=9Q@mail.gmail.com>

next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Aug 11, 2010 at 07:43:24AM +0200, Matthias Gamsjager wrote:
> > Please, insert into /boot/loader.conf only this options:
> > vm.kmem_size="999M"
> > vm.kmem_size_max="999M"
> > vfs.zfs.arc_max="160M"
> > vfs.zfs.prefetch_disable=1
> >
> > And after reboot, please run dd...
> 
> vfs.zfs.arc_max="160M" should be enough to limit the size of the arc.

But thats the point.  I don't want to limit its size, I want it to take
every available piece of memory it can find, while allowing applications
to temporarely use large slabs of that same memory during their runtime.
Just like I'm used to with UFS. :)

> and I'm not sure if that  ( vm.kmem_size="999M"
> ,vm.kmem_size_max="999M") is such a good idea.

Me neither.  I'm pretty sure I will hit the "kmem map too small"
scenario real quick.  What is it you are testing with those settings 
Vladislav?

Marco

-- 
Ik loop door het heden, naar de toekomst.
- Discovery Channel



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20100811060910.GA34883>