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Amazon CloudWatch not only aggregates the raw data coming in, it also computes several statistics on the data. The following table lists the statistics that you can request:
| Statistic | Description | |||
|---|---|---|---|---|
| Minimum |
The lowest value observed during the specified period. This can be used to determine low volumes of activity for your application. | |||
| Maximum |
The highest value observed during the specified period. You can use this to determine high volumes of activity for your application. | |||
| Sum |
The sum of all values received. This statistic can be useful for determining the total volume of a metric. | |||
| Average |
The Average of all values received during the specified period. By comparing this statistic with the minimum and maximum statistics, you can determine the full scope of a metric and how close the average use is to the minimum and the maximum. This will allow you to increase or decrease your resources as needed. | |||
| Samples |
The count (number) of measures used.
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Statistics are computed within the time period specified in the query. The maximum frequency with which statistics are gathered by Amazon CloudWatch is 1 minute.
CloudWatch data is generally available from the service within one minute from the end of the time period requested in the query (the aggregation period). In some cases, delays in data propagation might cause a delay in data becoming available to CloudWatch. In these instances, you should check the service’s Health Dashboard for any current operational issues with either Amazon CloudWatch or the service collecting the data.
![[Note]](images/note.png)
