FreeBSD 11.1 Beta 2 ZFS performance degradation on SSDs

[Caza, Aaron]

With regards to this issue, it's a case of the old FreeBSD 9.0 settings not working the same as in FreeBSD 10 & 11: the ZFS ARC min & max settings I was utilizing were too aggressive.

On a separate server with 18 days of uptime, bumping vfs.zfs.arc_min and vfs.zfs.arc_max up to something more reasonable sans reboot restored performance.

Apologies for the noise and thanks for the suggestions.

--
Aaron
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