We recently got in trouble with two Gentoo machines that where running under VMware ESX & ESXi.
The hosts froze randomly (Even the console in vmware froze). Especially when putting a little load on the machines. After hours of testing we found that removing virtual CPU’s from the host solved the problem. More that one CPU got the machine to freeze after some time.
!! Unsatisfied solution !! So after a couple of more hours we found a working solution….