$ heroku pg:info DATABASE_URL -a zundan-mastodon
=== DATABASE_URL, PG_HOBBY_BASIC_URL
Plan: Hobby-basic
Status: Available
Connections: 8/20
PG Version: 9.6.1
Created: 2017-04-20 18:31 UTC
Data Size: 103.1 MB
Tables: 30
Rows: 155319/10000000 (In compliance)