Statistics Interval
Adjustment in the
When you make a
request for statistics, the monitoring service might adjust the specified
roll-up interval times to improve the appearance of statistics graphs in a
graphical interface.
The monitoring service adjusts
the start time of a data collection request when it is not an exact multiple of
the interval length. In these instances, the start time is rounded downward to
the previous UTC time that is a multiple of the interval. All subsequent
intervals of the data collection are also adjusted to align with the new start
time.
For example, if the start time
is 10:31 and the interval length is 1 hour, the monitoring service adjusts the
start time to 10:00 and the roll-up intervals have the following continuous
pattern.
- 10:00 to 10:59:59.999
- 11:00 to 11:59:59.999
- 12:00 to 12:59:59.999
The monitoring service does not
adjust the end time of a data collection. Consequently, the response to a
statistics query might contain one more data value than expected, or an
incomplete final interval might be lengthened.