Feedback: ALTER DATABASE

Page: https://cockroachlabs.com/docs/v25.4/alter-database.html

## What is the reason for your feedback?

[X] Missing the information I need

[ ] Too complicated

[ ] Out of date

[ ] Something is broken

[ ] Other

## Additional details

Per Zendesk ticket #30349 the customer has requested we improve messaging/documentation around ALTER DATABASE … DROP REGION

We should surface an explicit estimate (or at least warnings) about:

- Temporary RF increases
- Expected extra disk usage
- Suggest to remove manual CONFIGURE ZONE state before region removal

We should also make it clear in docs that if your logical data is all in one region, you probably don’t want a region‑survival / RF=5 profile while decommissioning other regions.

Jira issue: DOC-15977