It seems I can't power on more than 30 VMs (15 machines per ESX host).
I do not understand why this is happening:
- with the 30 VMs powered on, both cluster nodes have the memory at around 50% while the CPU is at around 3%; plenty of resources available
- DRS and HA are enabled, but Admission Control is disabled
- vCenter has 4GB of RAM; I've increased it to 6GB but nothing changed (one hypothesis was that vCenter's JVM needs more memory to work with many VMs)
What could be the problem? Am I missing something? Can anyone help?