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May 5, 2025
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Update history-graph.markdown #38858

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Update history-graph.markdown
jackjourneyman May 3, 2025
4f01170
tiny tweak
c0ffeeca7 May 5, 2025
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6 changes: 6 additions & 0 deletions source/_dashboards/history-graph.markdown
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Expand Up @@ -93,6 +93,12 @@ name:
type: string
{% endconfiguration %}

### Long term statistics

Home Assistant saves long-term statistics for a sensor if the entity has a state_class of measurement, total, or total_increasing. For short-term statistics, a snapshot is taken every 5 minutes. For long-term statistics, an hourly aggregate is stored of the short-term statistics. Short-term statistics are automatically purged after a predefined period (default is 10 days). Long-term statistics are never purged.

In the history graph card, if the hours to show variable is set to a figure higher than the purge_keep period, long-term statistics will be used, with short term statistics shown in bold.

### Examples

```yaml
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