I'm trying to set up a CentOS installation on my ESXi host using VMware VSphere client, and despite my efforts, I continually receive an error. After creating the VM and attempting to start it for the first time, the startup bar fails at 20% and throws an error which states only "Insufficient resources" and checking the event log, the error is noted as a "General System Error." I have worked through several online troubleshooting guides, the most relevant seeming to be (http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006232), however to no avail. Any help or tips would be greatly appreciated.
Hope this one will give you a hint
"It happens because a VM is given a reservation that is larger than the free resources currently available"
here's the link
This one bugged me for a long time. A lot of research, a call to VMware..eventually I found something (don't remember where) and kept bugging the VMware phone support until they escalated it and got some questions answered.
I blogged about it in detail here. Hope it helps
"VMWARE cpu and ram reservations fixing insufficient resources error"