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# Interval

After HPE Controller has collected new statistics, it compresses old data for each compression level by taking all intervals of the length specified by the `Interval` configuration parameter, and replacing them with an average or sample value.

HPE Controller begins compression at the point where statistics have a timestamp that is divisible by the value of the `Interval` configuration parameter. An average value is used for compression of numerical statistics. For other statistics, HPE Controller uses the most frequent value in the statistics for compression.

If you set `Interval` to `0`, HPE Controller removes statistics that are older than the value of `MinAge`, rather than compressing them.

For clarity, HPE recommends that you specify the name of the level that deletes statistics as `ThrowAway`, rather than `CompressLevelN`.

Type: | Long
Default: | None
Required: | Yes
Configuration Section: | CompressLevelN
Example: | `Interval=120`
See Also: | Levels MinAge

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