For Rails teams running Postgres in production
Know why your queries got slow
after Friday's deploy.
See which deploy broke your queries. Monitor cache ratios, bloat, and vacuum health in one dashboard. Get a daily health score instead of guessing if Postgres is misconfigured. One gem. Five minutes to install. Free to start — launch pricing from $9/mo.
Free tier: 1 database, 3-day history. Upgrade anytime.
See it in action
90 seconds. Health score, deploy correlation, query trends.
Up and running in 5 minutes
Add the gem
One line in your Gemfile. The Lantern collector runs inside your Rails app — no separate agent or infrastructure.
gem "lantern-rails"
Deploy your app
Lantern starts collecting Postgres stats automatically. Add a CI webhook to tag each snapshot with the deploy that was live.
See what changed
Open your dashboard. Health score, query trends, and deploy markers — all correlated so you know exactly which deploy changed performance.
Catch regressions before your users do
Every snapshot is tied to a deploy. See the exact commit that changed your query performance.
Sound familiar?
Deploy → mystery slowdown
You shipped Friday afternoon. By Saturday queries were 3× slower. Without deploy-correlated monitoring you're running git bisect on instinct.
N+1s in production, not dev
Bullet finds them in development. Production has different data volumes and real traffic patterns — the N+1s that actually hurt only show up there.
Postgres is quietly misconfigured
work_mem at the default. random_page_cost tuned for spinning disks. These silent misconfigs silently cost 10–50% of your query performance.
What Lantern gives you
No infrastructure to manage.
Health score
A single 0–100 score across cache hit ratio, unused indexes, bloat, autovacuum health, and connection saturation. Check it like a dashboard instead of running 6 different queries.
Query trends
See how every query's mean time evolves across snapshots. Catch degradation early — before it hits your response times or your on-call rotation.
Deploy correlation
A single webhook from your CI or platform. Every snapshot is tagged to the commit that was live when it ran. See the exact deploy that changed your query performance.
Simple pricing
Ready to try it?
Free tier: 1 database, 3-day history. Five minutes to install.
Create your free account