why the clock become very slow?

[Eugene Vilensky]

> I think that's normal then.
>
> You can do the following according to your linux version:
>
> 1.Synchronize your linux time using vmware-tools
>
> 2.Adjust your kernel parameters base on the following:
>
> http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006427

I'm surprised that after all those kernel parameters, the NTP
configuration section of KB 1006427 says this:

"NTP Recommendations
Note: In all cases use NTP instead of VMware Tools periodic time
synchronization. Also, you may need to open the firewall (UDP 123) to
allow NTP traffic."

Is this a flat-out recommendation to use NTP anywhere and everywhere
possible?  Because there is no such explicit recommendation in this:
http://www.vmware.com/pdf/vmware_timekeeping.pdf