ManageIQ high RAM and CPU utilization

Hello Guys, i deployed the manageiq appliance under RHEV. All is fine except that VM consumes all RAM and CPU resources or most of the time is above 90%.
RAM is 16GB and CPU 6 cores.

I was trying to run cleanup_duplicate_host_guest_devices.rb because a thread that report posible duplicate gust_devices, but i cant because the following error

Traceback (most recent call last):
1: from ./tools/cleanup_duplicate_host_guest_devices.rb:28:in <main>' /usr/local/lib/ruby/gems/2.5.0/gems/activemodel-5.1.7/lib/active_model/attribute_methods.rb:432:in method_missing’: undefined method `host_hardwares’ for #ManageIQ::Providers::EmbeddedAnsible::AutomationManager:0x0000000002ca3a80 (NoMethodError)