After upgrading to 4.7 x86_64 on all our boxes (from 4.6), we have 3 VMware Server 1.0.5 hosts that are unstable. Sometimes they spontaneously reboot, other times they freeze and require a hard reset. Under 4.6, they were rock solid.

Failures tend to be associated with a guest start-up event, but are often at random times as well. There is no useful evidence in either the vmware or messages log files on the host.

The other thing that changed when we upgraded is that we upgraded our CentOS 4.6 (x86) guests to 4.7 and instead of recompiling a new kernel with HZ=100, we tested and implemented the newly available divider=10 kernel parameter. Initially, everything was fine with the divider option, but now I'm not so sure.

Probably not a coincidence is the fact that the 3 hosts that are affected do NOT have VT capable processors. Our quad-core Xeon boxes with VT have not been a problem.

I'm in the process of going back to an HZ=100 kernel. Of course, my first guest system reboot with the new kernel triggered a host reboot. Arrrggghhh.

Does anyone have similar experiences? Does anyone have a *stable* VMware Server 1.0.x host on 2.6.9-78.0.1 with non-VT processors? Is anyone else using divider=10 with VMware 1.0.x?