# Get statistics for metrics for your instances

You can get statistics for the CloudWatch metrics for your instances.

**Contents**

## Statistics overview

*Statistics* are metric data aggregations over
specified periods of time. CloudWatch provides statistics based on the metric data points provided
by your custom data or provided by other services in Amazon to CloudWatch. Aggregations are made
using the namespace, metric name, dimensions, and the data point unit of measure, within the
time period you specify. The following table describes the available statistics.

Statistic | Description |
---|---|

`Minimum` |
The lowest value observed during the specified period. You can use this value to determine low volumes of activity for your application. |

`Maximum` |
The highest value observed during the specified period. You can use this value to determine high volumes of activity for your application. |

`Sum` |
All values submitted for the matching metric added together. This statistic can be useful for determining the total volume of a metric. |

`Average` |
The value of |

`SampleCount` |
The count (number) of data points used for the statistical calculation. |

`pNN.NN` |
The value of the specified percentile. You can specify any percentile, using up to two decimal places (for example, p95.45). |