> For the complete documentation index, see [llms.txt](https://circleci.com/docs/llms.txt)

# CircleCI Server 4.9 FAQ

## Does server 4.9 have a data retention policy?

Data retention for MongoDB and PostgreSQL can be configured by following our guide [Data Retention in Server](https://circleci.com/docs/server-admin/server-4.9/operator/data-retention/).

## What control is granted over Nomad certificates?

Full control of the certificates, all the way down to mTLS for Nomad.

## Is it possible to change or disable the polling time which checks for health status?

No, this is not customizable.