# Enable the Permission cache

To enable the Group cache:

1. If you have not already done so, in the Change Center of the Administration Console, click Lock & Edit (see Use the Change Center).
2. Expand Compatibility Security > Caching Realms and click the name of the Caching realm.
3. Expand Configuration > Permissions and check Enable Permission Cache.
4. Set the size and duration attributes for the Permission cache.
5. Click Save to save your changes.
6. To activate these changes, in the Change Center of the Administration Console, click Activate Changes.
   Not all changes take effect immediately—some require a restart (see Use the Change Center).