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Als je een virtuele machine op een ESX host installeert dan loopt die na een tijdje steevast achter. Een server waarvan de tijd ouf of sync is, dat is vragen om problemen. Installeer dus zeker steeds vmware tools en vink “time synchronization between the virtual machine and ESX server” aan.
De technische uitleg
This happens because the guest OS assumes that there is a constant period of time between instructions - ie, it has all of the processor’s attention. The system clock is a high-precision clock maintained by this fact. When you put a guest OS into a virtual environment this goes out the window - the guest no longer has a consistent period of time between instructions, in general this time is longer than expected. Therefore means that individual ticks of the system clock take longer than the fixed (outside) time periods they should, and the system clock runs slow.
