# Database Migration Checklist

## Completed Tasks

- Schema dump captured from production.
- Read replicas drained and promoted.
- Application config switched to the new DSN.
- Old connection pool retired.

## Resolved Issues

- Connection storm during cut-over fixed by raising the pool ceiling.
- Stale prepared statements cleared after the failover.
- Replication lag alarm tuned to the new baseline.

## Done

- Post-migration verification suite passed.
- Runbook archived and linked from the on-call wiki.
