# Enable Coherence cache sharing at the partition level

Note: WebLogic Server Multitenant domain partitions are deprecated in WebLogic Server 12.2.1.4.0. The related Console and help pages will be removed in the next release.

Cache sharing allows a single cache instance to be used by multiple domain partitions. Each tenant has access to the same cache. Cache sharing is enabled at the partition level and must be set for each domain partition that accesses the cache. Cache sharing is transparent to the application.

Cache sharing must be explicitly set for each partition where the cache is deployed. Enabling cache sharing on a cache in one partition does not automatically share the cache for all partitions.

To enable cache sharing:

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. In the left pane of the Console, select Domain Partitions.
3. Select the partition where the Coherence cache is defined.
4. Select the Coherence Caches page.
5. From the Coherence Caches table, select a Coherence cache entry to modify its settings. The Settings for stores-shared-cache page displays.
6. Select Shared to enable cache sharing across multiple partitions.
7. Click Save.
8. 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).