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Date:      Tue, 19 Jan 2010 14:49:15 +0530
From:      Sherin George <>
Subject:   Setting "zfs_arc_max" value in FreeBSD 8.
Message-ID:  <>

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I am trying to tune ZFS file system by setting "zfs_arc_max" value in
FreeBSD 8.

In solaris, it is achieved like this

For example, if an application needs 5 GBytes of memory on a system with
36-GBytes of memory, you could set the arc maximum to 30 GBytes,
(0x780000000 or 32212254720 bytes). Set the zfs:zfs_arc_max parameter in the
/etc/system file:

set zfs:zfs_arc_max = 0x780000000


set zfs:zfs_arc_max = 32212254720

But, I couldn't find /etc/system file in FreeBSD.

Could some one please guide me to correctly configure "zfs_arc_max" in
FreeBSD 8.

Best Regards,

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