---
layout: documentation
title: Settings - Persistence
---

# Settings - Persistence

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**Persistence** stores data over time.
The data may be retrieved at a later time, for example to restore your system after startup, or to prepare graphs for display on the UI.

openHAB ships with the [RRD4J persistence service](/addons/persistence/rrd4j/) installed by default, which persists every Item on every state change and at least once a minute.
Additionally, it restores the last stored value at system startup.

Learn more about persistence in the [persistence docs]({{base}}/configuration/persistence.html).

To change this behaviour, this is the page you are looking for!

Here you can:

![persistence-settings](../images/persistence-settings.png)

- Set the **default persistence service**.
- **Configure Persistence Policies**<br>
  For each installed persistence service, a list entry is added.
  Clicking on a persistence service from that list opens a page to create a new one or edit the existing persistence configuration of that persistence service.
- **Install more persistence add-ons**<br>
  Click on the <!--F7:green plus_circle_fill --> plus button to switch to the add-ons store and install more persistence services.
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