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Date:      Sat, 20 Aug 2011 12:16:52 -0700
From:      Yuri <yuri@rawbw.com>
To:        Gary Gatten <Ggatten@waddell.com>
Cc:        "'freebsd-questions@freebsd.org'" <freebsd-questions@freebsd.org>
Subject:   Re: How much memory does ZFS use?
Message-ID:  <4E500824.5050107@rawbw.com>
In-Reply-To: <14599_1313865943_4E5000D7_14599_64_1_D9B37353831173459FDAA836D3B43499C5218872@WADPMBXV0.waddell.com>
References:  <14599_1313865943_4E5000D7_14599_64_1_D9B37353831173459FDAA836D3B43499C5218872@WADPMBXV0.waddell.com>

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On 08/20/2011 11:45, Gary Gatten wrote:
> Zfs isn't a typical daemon/process. That's like saying databased is a memory hog cause it needs a lot of ram for caching.

I know it's a kernel module.

>
> 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 you may need 4GB for optimum performance.

I meant mostly, for the same type of FS access, how does ZFS memory 
consumption compare with situation if I used UFS?

Also how can I see what memory consumption is for each kernel module?

Yuri



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