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Moving the clock forward has no impact on Uptime Infrastructure Monitor monitoring, but does cause a gap in performance data when running historical reports. It may appear that data is missing for the period of time represented by the time change but it's really just a logical gap in the timestamps for newly collected data. For example, if you moved the clock from 12 PM to 2 PM, you would appear to have a 2-hour gap in data collection when in reality, it' s only the clock changing.

Moving the clock backward causes a gap in data collection and service monitoring. Each UIM monitor logs a timestamp of the last time it ran to determine if (or when) it needs to run again. For example, if a monitor ran at 2 PM and you change clock back to 12 PM, the monitor does not run again until the clock once again reaches 2 PM. This gap is deliberately created to avoid the undesirable alternate result of creating duplicate historical data, which would occur if the monitors were forced to start running immediately after the time change.