デシベルダイエットで思い出したよ
$ heroku pg:info
=== HEROKU_POSTGRESQL_CYAN_URL, DATABASE_URL
Plan: Standard 0
Status: Available
Data Size: 6.33 GB
Tables: 66
PG Version: 10.10
Connections: 15/120
Connection Pooling: Available
Credentials: 1
Fork/Follow: Available
Rollback: earliest from 2020-01-17 16:58 UTC
Created: 2019-10-30 19:56 UTC
Region: us
Data Encryption: In Use
Continuous Protection: On
Maintenance: not required
Maintenance window: Thursdays 19:30 to 23:30 UTC
Add-on: postgresql-clean-89871