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Date:      Sat, 20 Aug 2011 13:45:42 -0500
From:      Gary Gatten <>
To:        "''" <>, "''" <>
Subject:   Re: How much memory does ZFS use?
Message-ID:  <>
In-Reply-To: <>

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Zfs isn't a typical daemon/process. That's like saying databased is a memor=
y hog cause it needs a lot of ram for caching.

Zfs ram requirements will depend on your file system i/o load, types/sizes =
of files, types and rates of file system ops, etc.  512MB may be fine, or y=
ou may need 4GB for optimum performance.

----- Original Message -----
From: Yuri []
Sent: Saturday, August 20, 2011 01:38 PM
To: FreeBSD Questions <>
Subject: How much memory does ZFS use?

Someone told me that ZFS is a memory hog and it should be avoided as such.
Is this true?
How can I understand how much memory particular kernel module consumes?
In Solaris there is mdb for that, what is an equivalent in FreeBSD?

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