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Add warning about a window size larger than one with many states (#26706)

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J. Nick Koston 2023-03-26 07:52:34 -10:00 committed by GitHub
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source/_integrations/filter.markdown
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@ -115,6 +115,12 @@ filters:
default: positive infinity
{% endconfiguration %}
<div class="note warning">
When configuring a `window_size` that is not a time and with a value larger than the default of `1`, the database must examine nearly every stored state for that entity during Home Assistant startup. If you have modified the [Recorder `purge_keep_days`](/integrations/recorder/#purge_keep_days) value or have many states stored in the database for the filtered entity, this can cause your Home Assistant instance can to respond poorly during startup.
</div>
## Filters
### Low-pass