First there is no requirement difference between the virtual and hardware appliance.
The needed resource are based on the amount of services, active checks and types of hosts. If you have a lot of snmp hosts you will need more cpu cores for executing the walk.
The one and only overview we have is as you already found this page: https://checkmk.com/product/appliances
We always recommend customers to orientate on the specifications for the HW Appliance.
When importing the virtual appliance, we have some default values preconfigured. Please check out this page: https://docs.checkmk.com/latest/en/introduction_virt1.html#_import_the_appliance
As this is a virtual machine, you can adjust these values at any time.
To configure the right resources, we recommend checking the following graphs:
- OMD <SITENAME> Performance
- activate the "Core statistics" snapin
Let's give you some example:
With this snapin you will be able to check the load of the fetcher and helper. At 70% we recommend increasing these values in the global settings. While you're increasing these values the CPU load and Memory consumption will grow.
That's why also recommend checking these graphs:
You will find here more information about the fetcher and checker architecture:
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