When you Perform Initial Configuration of the Panorama Virtual Appliance, you specify the memory and number of CPUs based on whether the appliance is in Panorama mode or Management Only mode and based on the log storage capacity or number of managed firewalls. If you later add storage capacity or managed firewalls, you must also increase the memory and CPUs. A Panorama virtual appliance in Log Collector mode must meet the system requirements, and does not need to have the CPU and memory increased beyond the minimum requirement. Review the Setup Prerequisites for the Panorama Virtual Appliance for the CPU and memory requirements for each Panorama mode.