The actual time that a statistic was collected is not readily predictable.
The API does not enable you to determine the exact time that a statistic was collected. Furthermore, some statistics, such as those for storage metrics, might take seconds or minutes to collect, so that they are not available immediately at the time a request is made to the guest operating system.
However, because statistics are collected at regular intervals, and roll-up intervals for a request generally all have the same size, each data point in the response represents the same number of statistics as the others. See Statistics Interval Adjustment in vCenter Server for more information.
