EvaluationWindow
The evaluation window that an alarm uses to select the range of metric data that it
evaluates each time it runs. This is a union type. Set exactly one of its members,
SlidingWindow or WallClockWindow. If you don't set
EvaluationWindow, the alarm uses a SlidingWindow by
default.
For more information, see Alarm evaluation windows in the CloudWatch User Guide.
Contents
Important
This data type is a UNION, so only one of the following members can be specified when used or returned.
- SlidingWindow
-
A sliding window, which advances each time the alarm is evaluated, forming a rolling time window. This is the default evaluation window.
Type: SlidingWindow object
Required: No
- WallClockWindow
-
A wall clock window, which aligns the evaluated range to fixed clock boundaries that match the alarm's period, such as the top of the hour, midnight, or the start of the calendar week.
Type: WallClockWindow object
Required: No
See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following: