You can enable or disable Database In-Memory from the Details page of an Autonomous Database.

1. Go to the Details page of the database for which you want to enable or disable Database In-Memory. For instructions, see View Details of a Dedicated Autonomous Database

   Note:

   For databases that use Autonomous Data Guard, go to the Details page of the primary database.

2. On Oracle Public Cloud, click Edit in the Resource Allocation section. On Exadata Cloud@Customer, click Edit in the Resources section. The Manage scaling page opens.
3. To enable Database In-Memory, select Enable database In-memory. If this check box is pre-selected, deselecting it will disable Database In-Memory.

   Note:

   Alternatively, you can open Manage scaling page by clicking Manage resource allocation under More actions on Oracle Public Cloud or Manage scaling under Actions on Exadata Cloud@Customer.

4. When you enable Database In-Memory, adjust the slider to set a percentage of System Global Area (SGA) to the In-Memory area.
5. Submit the details and apply your changes.