The recorder integration is responsible for storing details in a database, which then are handled by the history integration.

This integration constantly saves data. If you use the default configuration, the data will be saved on the media Home Assistant is installed on. In case of Raspberry Pi with an SD card, it might affect your system’s reaction time and life expectancy of the storage medium (the SD card). It is therefore recommended to store the data elsewhere (e.g., another system) or limit the amount of stored data (e.g., by excluding devices).

Home Assistant uses SQLAlchemy, which is an Object Relational Mapper (ORM). This means that you can use any SQL backend for the recorder that is supported by SQLAlchemy, like MySQL, MariaDB, PostgreSQL, or MS SQL Server.

The default database engine is SQLite which does not require any configuration. The database is stored in your Home Assistant configuration directory (’/config/’) and is named home-assistant_v2.db.

To change the defaults for the recorder integration in your installation, add the following to your configuration.yaml file:

# Example configuration.yaml entry

Configuration Variables



Enables the recorder integration. Only allowed once.



The URL that points to your database.



The max amount of times, the recorder retries to connect to the database.

Default value:




The time in seconds, that the recorder sleeps when trying to connect to the database.

Default value:




Automatically purge the database every night at 04:12 local time. Purging keeps the database from growing indefinitely, which takes up disk space and can make Home Assistant slow. If you disable auto_purge it is recommended that you create an automation to call the recorder.purge periodically.

Default value:




Specify the number of history days to keep in recorder database after a purge.

Default value:




How often (in seconds) the events and state changes are committed to the database. The default of 1 allows events to be committed almost right away without trashing the disk when an event storm happens. Increasing this will reduce disk I/O and may prolong disk (SD card) lifetime with the trade-off being that the logbook and history will lag. If this is set to 0 (zero), commit are made as soon as possible after an event is processed.

Default value:




Configure which integrations should be excluded from recordings.



The list of domains to be excluded from recordings.



The list of entity ids to be excluded from recordings.



The list of event types to be excluded from recordings.



Configure which integrations should be included in recordings. If set, all other entities will not be recorded.



The list of domains to be included in the recordings.



The list of entity ids to be included in the recordings.

Defining domains and entities to exclude (i.e. blacklist) is convenient when you are basically happy with the information recorded, but just want to remove some entities or domains.

# Example configuration.yaml entry with exclude
  purge_keep_days: 5
  db_url: sqlite:////home/user/.homeassistant/test
      - automation
      - updater
      - sun.sun # Don't record sun data
      - sensor.last_boot # Comes from 'systemmonitor' sensor platform
      - call_service # Don't record service calls

Defining domains and entities to record by using the include configuration (i.e. whitelist) is convenient if you have a lot of entities in your system and your exclude lists possibly get very large, so it might be better just to define the entities or domains to record.

# Example configuration.yaml entry with include
      - sensor
      - switch
      - media_player

You can also use the include list to define the domains/entities to record, and exclude some of those within the exclude list. This makes sense if you, for instance, include the sensor domain, but want to exclude some specific sensors. Instead of adding every sensor entity to the include entities list just include the sensor domain and exclude the sensor entities you are not interested in.

# Example configuration.yaml entry with include and exclude
      - sensor
      - switch
      - media_player
      - sensor.last_boot

If you only want to hide events from your history, take a look at the history integration. The same goes for the logbook. But if you have privacy concerns about certain events or want them in neither the history or logbook, you should use the exclude/include options of the recorder integration. That way they aren’t even in your database, you can reduce storage and keep the database small by excluding certain often-logged events (like sensor.last_boot).

Service purge

Call the service recorder.purge to start a purge task which deletes events and states older than x days, according to keep_days service data. Note that purging will not immediately decrease disk space usage but it will significantly slow down further growth.

Service data attribute Optional Description
keep_days yes The number of history days to keep in recorder database (defaults to the integration purge_keep_days configuration)
repack yes Rewrite the entire database, possibly saving some disk space. This is a heavy operation that can cause slowdowns and increased disk space usage while it runs. Only supported for SQLite and PostgreSQL.

Custom database engines

Database engine db_url
SQLite sqlite:////PATH/TO/DB_NAME
MariaDB mysql+pymysql://SERVER_IP/DB_NAME?charset=utf8
MariaDB mysql+pymysql://user:[email protected]_IP/DB_NAME?charset=utf8
MariaDB (omit pymysql) mysql://user:[email protected]_IP/DB_NAME?charset=utf8
MySQL mysql://SERVER_IP/DB_NAME?charset=utf8
MySQL mysql://user:[email protected]_IP/DB_NAME?charset=utf8
PostgreSQL postgresql://SERVER_IP/DB_NAME
PostgreSQL postgresql://user:[email protected]_IP/DB_NAME
PostgreSQL (Socket) postgresql://@/DB_NAME
PostgreSQL (Custom socket dir) postgresql://@/DB_NAME?host=/path/to/dir
MS SQL Server mssql+pyodbc://username:[email protected]_IP/DB_NAME?charset=utf8;DRIVER={DRIVER};Port=1433;

Some installations of MariaDB/MySQL may require an ALTERNATE_PORT (3rd-party hosting providers or parallel installations) to be added to the SERVER_IP, e.g., mysql://user:[email protected]_IP:ALTERNATE_PORT/DB_NAME?charset=utf8.

If using an external MariaDB backend (e.g., running on a separate NAS) with Home Assistant, you should omit pymysql from the URL. pymysql is not included in the base Docker image, and is not necessary for this to work.

Unix Socket connections always bring performance advantages over TCP, if the database is on the same host as the recorder instance (i.e., localhost).

If you want to use Unix Sockets for PostgreSQL you need to modify the pg_hba.conf. See PostgreSQL

If you are using the default FULL recovery model for MS SQL Server you will need to manually backup your log file to prevent your transaction log from growing too large. It is recommended you change the recovery model to SIMPLE unless you are worried about data loss between backups.

Database startup

If you are running a database server instance on the same server as Home Assistant then you must ensure that this service starts before Home Assistant. For a Linux instance running Systemd (Raspberry Pi, Debian, Ubuntu and others) you should edit the service file. To help facilitate this, db_max_retry and db_retry_wait variables have been added to ensure the recorder retries the connection to your database enough times, for your database to start up.

sudo nano /etc/systemd/system/[email protected]

and add the service for the database, for example, PostgreSQL:

Description=Home Assistant postgresql.service

Save the file then reload systemctl:

sudo systemctl daemon-reload

Installation notes

Not all Python bindings for the chosen database engine can be installed directly. This section contains additional details that should help you to get it working.

MariaDB and MySQL

If you are in a virtual environment, don’t forget to activate it before installing the mysqlclient Python package described below.

[email protected]:~ $ sudo -u homeassistant -H -s
[email protected]:~$ source /srv/homeassistant/bin/activate
(homeassistant) [email protected]:~$ pip3 install mysqlclient

For MariaDB you may have to install a few dependencies. If you’re using MariaDB version 10.2, libmariadbclient-dev was renamed to libmariadb-dev. If you’re using MariaDB 10.3, the package libmariadb-dev-compat must also be installed. For MariaDB v10.0.34 only libmariadb-dev-compat is needed. Please install the correct packages based on your MariaDB version.

On the Python side we use the mysqlclient:

sudo apt-get install libmariadbclient-dev libssl-dev
pip3 install mysqlclient

For MySQL you may have to install a few dependencies. You can choose between pymysql and mysqlclient:

sudo apt-get install default-libmysqlclient-dev libssl-dev
pip3 install mysqlclient

After installing the dependencies, it is required to create the database manually. During the startup, Home Assistant will look for the database specified in the db_url. If the database doesn’t exist, it will not automatically create it for you.

Once Home Assistant finds the database, with the right level of permissions, all the required tables will then be automatically created and the data will be populated accordingly.


For PostgreSQL you may have to install a few dependencies:

sudo apt-get install postgresql-server-dev-X.Y
pip3 install psycopg2

For using Unix Sockets, add the following line to your pg_hba.conf:

local DB_NAME USER_NAME peer

Where DB_NAME is the name of your database and USER_NAME is the name of the user running the Home Assistant instance (see securing your installation).

Reload the PostgreSQL configuration after that:

$ sudo -i -u postgres psql -c "SELECT pg_reload_conf();"
(1 row)

A service restart will work as well.

MS SQL Server

For MS SQL Server you will have to install a few dependencies:

sudo apt-get install unixodbc-dev
pip3 install pyodbc

If you are in a virtual environment, don’t forget to activate it before installing the pyodbc package.

sudo -u homeassistant -H -s
source /srv/homeassistant/bin/activate
pip3 install pyodbc

You will also need to install an ODBC Driver. Microsoft ODBC drivers are recommended, however FreeTDS is available for systems that are not supported by Microsoft. Instructions for installing the Microsoft ODBC drivers can be found here.

If you are using, FreeTDS is already installed for you. The db_url you need to use is mssql+pyodbc://username:[email protected]_IP/DB_NAME?charset=utf8;DRIVER={FreeTDS};Port=1433;.