Wall Clocks Lie

Lonny Niederstadt digs into some strange behavior on one of his VMs:

Rats.  That was a really good idea, too.  Nothin’.  Or….
(I want to call attention to the change in maximum axis value for CPU utilization.  I nearly *always* use 100% as the maximum value, In these last two graphs I’ve used a maximum value of 24% because utilization of each of the 4 vcpus is really low and I felt it made the graphs slightly more readable.)
Hey!! Perfmon was collecting 30 second samples.  But two intervals after 2:06:22 is 2:07:52 rather than 2:07:22.  The system lost 30 seconds in the span of a minute.  And two intervals past 2:07:52 is 2:11:22 – the system lost 150 seconds in a minute?

It would appear that there are a couple of issues with this box, one of which is a lack of appreciation of the current time.

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