Mariadb is too big

Hello,
I have a problem with the size of mariadb database. It grows exponentially like 1.5 Gb/h. In config.yaml I included ~70 entities like automations, 7/8 lights, 3 temperature/humidity sensor, persons, openweather temperature, speedtest, 2 motion sensor, cellphone stats like battery and geolocated, switches.

I don’t know if it stops growing because I ran out of space but it seems too big for what it saves.
(Sorry for my English)

Take a look at what is filling it. Mysql/mariadb is incredibly well documented on the internet. By the way exponential is not the right word.