I have 2 vCenter 5.5 Servers. They running Windows 2012 R2 VM's. And they are in Linked-Mode. Everythin runs fine - but after a while, vCenter 1 uses much more CPU and Memory than vCenter 2 and when i login with the webclient, on vcenter 1 the inventory is incorrect and if i power on a vm, the webclient is running the circle of death und tries to refresh the view - in the backgroud (with the old vsphere client) i see, de VM is running - but in de webclient nothing happens. when i do the same on vcenter 2 - everything runs fast and works fine.
vcenter servers
4 vCPUs
32 GB Memory
Windows 2012 R2
About 10 Hosts and 10 VMs per vCenter....