Plex is installed in a jail. I installed it by hand and use the pms_updater.sh script to manage updates.
I've placed the transcoding in its own dataset and copied the permissions.
The jail is FreeBSD 10.3-RELEASE.
Plex version 1.9.2.4285
Hardware Specs:
Supermicro X9SRL-F Motherboard
Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz
16GB RAM
8x 3TB drives in a single RAID Z3