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Update statistics-graph.markdown with retention information (#31442)

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Add information on hourly statistics and add retention information for both hourly and 5-minute statistics.
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Rick Auch 2024-02-16 03:49:34 -06:00 committed by GitHub
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@ -17,7 +17,7 @@ Screenshot of the statistics graph card with none metered entities and `chart_ty
Screenshot of the statistics graph card with a metered entity and `chart_type` `bar`.
</p>
Statistics are gathered every 5 minutes for sensors that support it. It will either keep the <abbr title="Minimum">`min`</abbr>, <abbr title="Maximum">`max`</abbr>, and <abbr title="Average">`mean`</abbr> of a sensor's value for a specific hour or the <abbr title="Total">`sum`</abbr> for a metered entity.
Statistics are gathered every 5 minutes and also hourly for sensors that support it. The 5-minute statistics will be retained for the duration set in the [recorder configuration](/integrations/recorder/#purge_keep_days), and hourly statistics will be retained indefinitely. It will either keep the <abbr title="Minimum">`min`</abbr>, <abbr title="Maximum">`max`</abbr>, and <abbr title="Average">`mean`</abbr> of a sensor's value for a specific hour or the <abbr title="Total">`sum`</abbr> for a metered entity.
If your sensor doesn't work with statistics, check [this](/more-info/statistics/).