The value of tmnxVdoGrpSrcVqmStatsTime is effectively based on the
value of 'tmnxVdoGrpSrcVqmStatsPeriod'. If
'tmnxVdoGrpSrcVqmStatsPeriod' has a value of 'current', then this
object has no functionality and gets assigned a numerical value of '0'.
If 'tmnxVdoGrpSrcVqmStatsPeriod' has a value of 'interval', then this
object specifies the duration of the time-interval in minutes for
which the statistics will be displayed to the user.