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Date:      Mon, 07 Jan 2008 12:26:03 +0000
From:      Pete French <petefrench@ticketswitch.com>
To:        mharo@FreeBSD.org
Cc:        stable@freebsd.org
Subject:   Re: kmem_map too small under ZFS
Message-ID:  <E1JBr3L-0000Mf-JD@dilbert.ticketswitch.com>
In-Reply-To: <4cd036390801070409l4d8f1cf9te86772f188f89dfe@mail.gmail.com>

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> vm.kmem_size="512M"
> vm.kmem_size_max="512M"

I have similar to this in mine...

vm.kmem_size=629145600
vm.kmem_size_max=629145600

which is about 600 meg - the machine has 2 gig of RAM.

> vfs.zfs.prefetch_disable="1"
> vfs.zfs.arc_max="150M"
> kern.maxvnodes="400000"

now these I havent got - I did see a reference to disabling the intent log,
which is what I was about to try. I will give your settings a shot too.

> Most of these settings came from various mailing list postings.  It's
> possible that some don't do anything useful, but I haven't had a zfs
> related panic since.

Worth a try - might see if I can find a way tro reliably trigger the
opanic and then tyrn these bits back on one at a time too.

thanks,

-pete.



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