OMG WTF VMWARE!
So..Transparent Page Sharing (TPS) is turned off after the most current ESXi 5.5 update 2. And a KB article is available for it but why? Why?
It is quite easy to bring it back the way it used to be but will need an extra reboot.
After patching, using your trusty vMA, issue the following command on each host.
esxcfg-advcfg --vihost HOSTNAME -set 0 Mem.ShareForceSalting
Then start another reboot.
You can check to make sure this is correctly set:
esxcfg-advcfg --vihost HOSTNAME -get Mem.ShareForceSalting
and you should get the value of zero (0) as such:
Value of Share force salting is 0