高いHeroku Postgresはメンテナンスウインドウを指定できたりうれしいんだけど行数は数えてもらえないのよね
$ heroku pg:info DATABASE_URL -a zundan-mastodon
=== DATABASE_URL, HEROKU_POSTGRESQL_ROSE_URL
Plan: Standard 0
Status: Available
Data Size: 3.15 GB
Tables: 58
PG Version: 10.7
Connections: 13/120
Connection Pooling: Available
Credentials: 1
Fork/Follow: Available
Rollback: earliest from 2019-02-15 19:51 UTC
Created: 2019-02-15 19:46 UTC
Region: us
Data Encryption: In Use
Continuous Protection: On
Maintenance: not required
Maintenance window: Mondays 17:30 to 21:30 UTC