> # Caching Realm: ACL

> Configuration Options Related Tasks Related Topics

> Use this page to configure and enable the ACL cache for the Caching realm. To use the Caching realm, you need to use Compatibility security. The use of the Caching realm is deprecated in this release of WebLogic Server.

> #### Configuration Options

> Name | Description
> --- | ---
> Enable ACL Cache | Specifies whether the ACL cache should be enabled. By default,the ACL cache is enabled.
> ACL Cache Size | The maximum number of ACL lookups (between 17 and 65537) that should be cached. This attribute should be a prime number for best lookup performance.
> ACL Cache Positive TTL | The number of seconds (between 1 and a positive 32-bit integer) to retain the results of a successful ACL lookup.
> ACL Cache Negative TTL | The number of seconds (between 1 and a positive 32-bit integer) to retain the results of an unsuccessful ACL lookup.

> Related Tasks

> - Configure Caching realms
> - Enable the ACL cache
> - Enable the Authentication cache
> - Enable the User cache
> - Enable the Permission cache

> Related Topics

> - Using Compatibility Security