How much history is stored and how can we limit it?

[tom_l]

It is this setting in the recorder integration: https://www.home-assistant.io/integrations/recorder/#purge_keep_days it lists the default as 10 days.

You can also limit the amount of data stored by excluding entities you are not interested in the history of.

How to reduce your database size and extend the life of your SD card

Preamble: @tom_l is the original author of this community guide. He proposed an analytical approach to decide for each entity_id whether to include or exclude it from the underlying database. @mbuscher suggested to go after the entities most often updated in the database, and exclude only those. Both approaches are now included in this community guide. Target audience: anyone who uses an installation on flash memory like a Raspberry Pi with an SD card or an SSD drive, or anyone who wishes to re…