# Configure the Retention Period for an Unlimited Storage Database

> **📝 Note**: Unlimited storage databases are not available in all editions of SingleStore. For more information, see [SingleStore Editions](https://docs.singlestore.com/db/v9.1/introduction/singlestore-editions.md).

The engine variable `bottomless_gc_retention_period_minutes` specifies how long historical information used to enable point-in-time recovery (PITR) is retained. The default value of is 1440 minutes. To override the default value, set the engine variable. For example, to set to the value to 3000 minutes:

```sql
SET GLOBAL bottomless_gc_retention_period_minutes = 3000;
```

Once a milestone reaches the retention period set by `bottomless_gc_retention_period_minutes`, it will no longer be available and will not appear in the `MV_MILESTONES` information schema table.

You cannot attach an unlimited storage database at a milestone or time that is not within the retention period. For example, suppose `bottomless_gc_retention_period_minutes` is 1440 minutes (1 day). On June 1 you create a milestone for a database `d`. On June 3, you would not be able to attach `d` at the milestone created on June 1 or at a point in time that occurred on June 1.

***

Modified at: May 5, 2023

Source: [/db/v9.1/manage-data/unlimited-data-storage/configure-the-retention-period-for-an-unlimited-storage-database/](https://docs.singlestore.com/db/v9.1/manage-data/unlimited-data-storage/configure-the-retention-period-for-an-unlimited-storage-database/)

(An index of the documentation is available at /llms.txt)