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Customers can use these procedures to obtain detailed statistics, including the popular request for Tunnels (loss, latency, jitter and so on), interface and flow statistics.

Note: The process for retrieving CPU and memory stats for each EdgeConnect follows a different process and is not file-based.

### Getting Statistics Time Range

Appliances generate statistics every minute. Each minute, appliances generate statistics of different types in different CSV files. These CSV files are zipped into a single file for convenience. Appliances are also configured to keep only a certain number of these files. Appliances also retain statistics for a specified time period only. The polling systems (Orchestrator or third-party systems) must get their data before these files age out. Most appliances are configured to keep this data for at least a few hours. You can configure the length of time appliances keep data in the Orchestrator.

A poller calls the following REST API to get a range of timestamps for which data is present on the appliance:

This will return the following output:

These two numbers are minute boundaries expressed in standard epoch seconds. This example indicates Tuesday, April 12, 2022, 3:49:00 PM to Monday, April 11, 2022, 3:45:00 PM.

### Polling for a Specific Minute

Once you obtain the time range, you can iterate over every minute (or start from the last minute not yet retrieved). For example:

The API for retrieving a zip file for a specific minute looks like this:

All the file names start with st2- and are followed by a minute timestamp in epoch seconds. The file extension is .tgz