This is more of a VMware specific question for timekeeping and Virtual Machines.  No need to reinvent the wheel here, so check the following link from VMware regarding this topic.  [URL]
it takes days to see the lose of synchrony in seconds, then the lose of synchrony reflect minutes, big problem  is it a hardware esx server problem? is it a service console time definition that i missed? where the time of esx is coming from? thank you  Maynor.
in esx 4.1 after setting ntp in a linux vm server, coming from ovf, it lose 
synchrony