高いデータベースだと問題かもしれないことも教えてもらえる!! (実際にはもっと詳しいけど文字数)
$ heroku pg:diagnose
RED: Hit Rate
Name Ratio
────────────────────── ──────────────────
overall cache hit rate 0.8664598056658124
YELLOW: Indexes
Reason Index
────────────────────── ─────────────────────────────────────────────
Low Scans, High Writes index_statuses_on_reblog_of_id_and_account_id
Low Scans, High Writes index_statuses_on_in_reply_to_id
Low Scans, High Writes index_statuses_on_in_reply_to_account_id
Low Scans, High Writes index_statuses_20180106
: