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Date:      Tue, 8 Jul 2008 18:27:21 -0500 (CDT)
From:      Kevin Monceaux <Kevin@RawFedDogs.net>
To:        FreeBSD Questions E-Mail List <FreeBSD-Questions@FreeBSD.org>
Subject:   Re: "New" user with a possible ZFS problem
Message-ID:  <alpine.BSF.1.10.0807081817490.1175@Blaidd-Drwg.RawFedDogs.net>
In-Reply-To: <4873D449.2040503@FreeBSD.org>
References:  <alpine.BSF.1.10.0807021643150.19153@Blaidd-Drwg.RawFedDogs.net> <alpine.BSF.1.10.0807021906460.19153@Blaidd-Drwg.RawFedDogs.net> <4873D449.2040503@FreeBSD.org>

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Kris,

On Tue, 8 Jul 2008, Kris Kennaway wrote:

> You may be running out of memory.  Increase kmem_size until it goes 
> away.  I use 1500M on my systems, which are stable.  Yes, ZFS is a 
> memory hog.

Boy, ZFS sure does sound like it's earned the title of memory hog.  Oddly 
I'd been running for about a week without problems, and shuffled some 
large files around during that week, and right before I got your e-mail I 
had another hang.  I tried increasing the kmem_size setting and was 
rewarded with a panic on reboot.  I already had it set at 512M.  A little 
Googling tells me I'm going to have to compile a custom kernel to increase 
it beyond that.  Oh well, it's about time I learned how to do that anyway. 
I've compiled many a custom Linux kernel.  I started using Linux in the 
1.xx kernel days before there were loadable kernel modules so almost 
everything involved a kernel recompile.  I've read over the FreeBSD kernel 
compile docs quite a while back but will need to go over them again. 
Anyway, thanks for the tip.  I'll give it a try after a little research 
and a little, or a lot of, compiling.



Kevin
http://www.RawFedDogs.net
http://www.WacoAgilityGroup.org
Bruceville, TX

Si hoc legere scis nimium eruditionis habes.
Longum iter est per praecepta, breve et efficax per exempla!!!




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