VMWare ESXi4 with 2 VM's (FreeBSD-amd64). When doing a reboot on one of the VM's, the reboot is done in normal speed, but after that, the interactive response time on the other gets very slow: pressing return at the command prompt, takes serveral seconds to be exectuted. SSH-ing to the VM machine takes a long time before you are logged in. Only after 20 minutes or so, the situation is normalized.
What's the reason and how to remedy?