Nagios Support Forum

Hi Support,

We have a Cisco USCB-B200-m4 Blade server equipped w/ Dual 2.3GHz CPU. How come we couldn't add more than 8 Logical Cores to the Nagios XI VM? However, we could add as many as up to 32 Cores on Hyper-V.
Also, we were able to add more Cores to others VM especially Windows 2012R2.

Thanks in advance!

This can depend on the version of VMWare you are running. Is it Workstation or ESXi, what version?

Generally, you can change the hardware compatibility of the VM, and newer versions will allow more Cores once converted.

Hi Scott,
We have VMware vSphere 6 installed. That's why I tried it on one of our Hyper-V servers and confirmed Nagios XI can be modified to add more Cores beyond 8. Just need the official confirmation the Virtual Appliance is not hard coded w/ a maximum number Physical or Logical Cores set to 8 or otherwise. Tks for the reply!

Hi Scott,
Finally found one vSphere 5.x with a single CPU but 12 Cores and able to duplicate the issue. On a Windows 2016 VM, I was able to add up to 12 Logical Cores but only 8 on a newly deployed OVF Nagios XI. What must be configured for CentOS? TIA

By default you shouldn't need to configure anything special for CentOS

Scott,
The root cause it's the OVA or the template. It must be using the default 8 vCPU cuz if I picked custom deployment, it detected all 12 Cores & let us create the Centos 64-bit w/ 12 Cores. We are still trying to find out why even initially set at 8 vCPUs but we still cannot add the additional 4 Cores cuz the setting only shows 8 instead of 12 available.

Scott,
I will open a support ticket for this one instead. Should I keep it open so I can update this thread if we ever find out the root cause? TX again!

It is the Hardware compatibility. On your ESX server, with the VM stopped, you can right click the VM and choose "Upgrade Hardware"
then yes

We start with a very old compatibility to allow the VM's to be used be people running older systems

Tks Scott! Already sent solution to client. Pls close this thread.

closing